Mustafa Koçak

Gedik Holding, İstanbul Gedik University

In this research, fillet welding was conducted on 8-mm thick Miilux OY Protection 600 (MIL-A-46100) armor steel using AWS A5.9 GeKa ER307 austenitic filler wire. The welding process involved robotic MIG/MAG with five different heat inputs ranging from 0.3 to 1.2 kJ/mm. The study focused on examining the influence of heat input on the microstructure...

Savunma sanayisinin zırhlı araçları için geliştirilen düşük alaşımlı yüksek mukavemetli zırh çeliklerinin ark kaynak teknolojisi uygulamaları metalurjik bilgi ve deneyim isteyen zor uygulamalardır. Bu çeliklerin yüksek karbon eşdeğeri ve yüksek mukavemeti sağlayan martenzitik mikroyapıları nedeniyle kaynak proseslerinde güçlüklerle karşılaşılmaktad...

Additive manufacturing (AM) has numerous advantages over traditional manufacturing methods, such as efficient material usage, production close to the final shape, development of new alloy components, and suitability for low-volume production. Among the AM methods, wire arc additive manufacturing (WAAM), also known as arc direct energy deposition (A...

Replacing the traditional casting method with wire arc additive manufacturing (WAAM) to produce complex shaped parts will lead to using cost-effective technology even for challenging engineering applications depending on their geometry and number of the parts to be produced. This work performed a comparative study on the stainless steel 316 parts m...

Bimetallic parts are used in many industrial fields, such as pressure vessels, shipbuilding, aerospace, and automotive industries. Conventional bimetallic part production involves a combination of two different metals that are joined using welding and brazing operations. Additive manufacturing technologies offer a cost-effective and innovative manu...

This study investigated the effect of powder-pack aluminizing treatment on the high-temperature oxidation of ER307 stainless steel components fabricated by wire arc additive manufacturing (WAAM) during isothermal oxidation at 1000 ◦C for 5 h, 25 h, and 50 h. Scanning electron microscopy (SEM), energy dispersion spectroscopy (EDS), X-ray diffraction...

Directed energy deposition (DED) technology is a cost-effective additive manufacturing method widely used in the production of complex-shaped parts made of various engineering alloys as well as superalloys due to its advantages such as high deposition efficiency, low-cost and flexible production possibilities. However, in addition to the low surfac...

Wire-arc additive manufacturing (WAAM) is a promising method to produce many functional components in different industries. In this method, the welding wires from the feedstock are melted by arc discharge and deposited layer by layer. Other welding wires having different chemical compositions can also be added to the top of the previously deposited...

Wire arc additive manufacturing (WAAM) has recently gained great attention in producing metallic parts due to significant cost savings, high deposition, and its convenience. However, there is still limited knowledge concerning testing for mechanical properties of the WAAM-produced steel parts using different welding wires. This paper presents the r...

In this study, the effect of the notch locations on the Charpy-V toughness values of the all-welded joint obtained using robotic flux-cored arc welding was investigated with respect to microstructures at the notch locations. Charpy impact tests were performed through the thickness with notch location at the centerline as well as off-set regions of...

In this study, AH36 steel plates which are commonly used in the hull of ships and in the construction of tanks in marine industry, were butt welded underwater by using shielded metal arc welding method and E6013 (GeKaTec UW E6013) rutile electrodes. Welding operations were carried out by expert industrial divers at a depth of 4 meters in a real sea...

In this study, a low-alloy steel component was manufactured using specially produced E70C-6M class of metal-cored welding wire according to AWS A5.18 standard for the WAAM process. The manufactured low-alloy steel component was first subjected to radiographic examination to detect any weld defect. Uniaxial tensile tests were conducted for the botto...

Bu çalışmada, rutil karakterli kaynak elektrodları ile düşük alaşımlı S355J2+N çelik plakaları kullanılarak su altı ve atmosferik ortam şartlarında saf kaynak metalinin metalürjik özellikleri incelenmiştir. Su altı kaynakları, Türkiye’de ilk defa AWS A5.35 standardına göre özel olarak geliştirilen parafin kaplı GeKaTec UW E7014 su altı elektrodları...

In this study, fillet welding processes were performed on high strength Miilux Protection 500 (MIL-A46100) steel, which is used as armour material in defence industry, using GMAW method with austenitic ER307 and ferritic ER110S-G filler metals. The characterization of welded structure was carried out by performing elemental mapping processes as wel...

Additive manufacturing technologies are applied in different industrial fields. It is possible to produce 3D parts in complex form at a lower cost with faster production capability using additive manufacturing compared to traditional subtractive manufacturing. Robotic welding-based wire arc additive manufacturing (WAAM) is a novel additive manufact...

The Protection 500 series (according to MIL-A-46100 standard) are widely used in the defence industry against a range of battlefield threats as armour material due to their high strength, weldability, and ballistic properties. However, the heat cycle during the welding process causes the softening in heat-affected zone and reveals a structure with...

For the reliability of many welded structures like pipelines or offshore wind parks, it is necessary to ensure high mechanical properties such as strength and toughness of the entire material. In order to improve quality of weld joints, flux cored rods and wires containing different nanoparticles (ZrO2, LaB6 and Al2O3) were manufactured and welded...

Mechanical characterization, fatigue performance and failure analysis of laser spot welds and resistance spot welds under tensile-shear loading have been investigated. Similar and dissimilar joints of dual phase advanced high-strength steel (DP780) and deep-drawing steel (DC04) of 2.0 mm thickness for application in the automotive industry were per...

Accuracy of indirect fatigue crack length measurement by potential drop method or by compliance technique may be affected at low load ratio due to fracture surface contact, crack closure or mixed mode fracture. As an alternative, the maximum value of crack opening displacement, CODmax, from a clip gauge was utilized. Middle crack tension M(T) speci...

Future metallic airframes may contain laser beam welded clips (to the skin) between two stringers to achieve lightweight integral airframes. In this study, an investigation involving stress analysis and fatigue testing of skin-clip laser welded T-joints in 6156 T4 aluminium alloy plates was carried out. The thickness of the base plate (skin) was lo...

In this article, the characterization of the interfacial structure of diffusion bonding a TiAl alloy is presented. The joining surfaces were modified by Ni/Al reactive multilayer deposition as an alternative approach to conventional diffusion bonding. TiAl substrates were coated with alternated Ni and Al nanolayers. The nanolayers were deposited by...

Controlling the amount of distortion and tensile residual stresses plays an important role during welding of high strength steels. The amount of distortion and residual stresses in high strength steel welds may be reduced and compressive residual stresses can be induced by lowering the transformation temperature with the use of low-transformation-t...

The welding of block joints in shipbuilding often requires much effort as the fabrication without margins sometimes leads to large gaps between them. The high constraint during the welding process can lead to unfavourable high residual stresses. For this reason, a project was undertaken to investigate whether butt joints welded with larger gaps ful...

The diffusion bonding of TiAl using reactive Ni/Al multilayer thin films with Ti and Ni foils was investigated. Bonding experiments were performed at 800 and 900°C, at a pressure of 5MPa and for bonding times of 30 and 60min. The bonding surfaces were modified by sputtering, by deposition of Ni and Al nanolayers to increase the diffusivity at the i...

An AZ31 HP magnesium alloy was laser beam welded in autogenous mode with AZ61 filler using Nd-YAG laser system. Microstructural examination revealed that the laser beam weld metals obtained with or without filler material had an average grain size of about 12 μm. The microhardness and the tensile strength of the weldments were similar to those of t...

The welding of block joints in shipbuilding often requires much effort because fabrication without margins sometimes leads to large gaps between blocks. The high stresses occurring due to constraints may be unfavourable. For this reason, a project was undertaken to investigate if butt joints welded with larger gaps fulfil the requirements. The obje...

This paper focuses on high power fiber laser welding of steel material for the field of pipe production. X65 and X70 steel plate material in thicknesses of 9.5 mm and 14 mm was welded with laser-GMA-hybrid welding processes with a maximum laser power of 8 kW. Two different filler wires and joint preparations were tested for their weldability. Relat...

Das Verschweißen der Stöße von Schiffssektionen ist im Hinblick auf den Luftspalt oft mit hohem Fertigungsaufwand verbunden, weil bei der zugabenfreien Genaufertigung fallweise größere Luftspalte auftreten. Aus diesem Grund wurde innerhalb eines Forschungs- und Entwicklungsvorhabens untersucht, ob Schweißstöße mit größeren Luflspalten den Anforderun...

Dissimilar welds of aluminium alloy AA6056 and titanium alloy Ti6Al4V were produced by a novel technique. AA6056 sheet was machined at one end to a U-slot shape, enabling the intake of the Ti6Al4V sheet. The Al-alloy U-slot was then butt welded by split laser beam without using a filling wire, thus making a weld by melting only the Al-alloy. Thereb...

With the stimulus of temperature and pressure Ni and Al can quickly react and produce the intermetallic compound NiAl. This reaction is highly exothermic and high temperatures can be attained in the surroundings. These characteristics make Ni/Al multilayers very attractive to technological applications as localised heat sources. In this study, Ni/A...

Extent of experiment-related variability in fatigue crack propagation is essential to be known while comparing the performance with other materials, for assessment of welds or damage tolerance analysis. Since such a variability can be dependent on material or parameter investigated, and may originate from the size effect, thin sheets of the relativ...

Introduction: To determine the relation of serum magnesium level with metabolic and clinical parameters in obese children. Materials and Methods: Children presenting with weight gain whose BMI was over 95th percentile (obese children) and children with BMI lower than 85th percentile (non-obese) were included to the study. Taking drugs or having a h...

This paper describes microstructure and microtexture development in dissimilar friction welded -TAB-Ti64 joints. The effect of friction welding parameters on microstructure and local properties are examined and discussed. It was found that the intermetallic -TiAl based alloy Ti-47Al-3.5(Mn+Cr+Nb)-0.8(B+Si) (denoted as -TAB) is more sensitive to...

GKSS is currently investing heavily into new beamlines at DESY in Hamburg, Germany. After the completed installation of the wiggler beamline HARWI II at DORIS III GKSS is now building two new undulator beamlines at the new PETRA III storage ring The High Energy Materials Science Beamline (HEMS) will allow high resolution diffraction experiments usi...

Excessive tensile residual stresses and distortion may develop in welding of steels depending on the phase transformation temperature as it plays an important role on their formation during welding. The development of distortion in the welded steel structures lead to time-energy consuming and environmentally detrimental correction operations wherea...

The welding of block joints in shipbuilding often creates much effort as the fabrication without margins leads sometimes to large gaps between them. Unfavourable may be the high stresses occurring due to constraints. For this reason a research project was performed to investigate whether butt joints welded with larger gaps fulfill the requirements....

The welding of block joints in shipbuilding often creates much effort as the fabrication without margins leads sometimes to large gaps between them. Unfavourable may be the high stresses occurring due to constraints. For this reason a project was performed to investigate if butt joints welded with larger gaps fulfil the requirements. The objective...

Das Verschweißen der Stöße von Schiffssektionen ist im Hinblick auf den zu verschweißenden Luftspalt oft mit hohem Fertigungsaufwand verbunden, weil bei der zugabenfreien Genaufertigung fallweise größere Luftspalte auftreten. Aus diesem Grund wurde innerhalb eines FuE-Vorhabens [1] untersucht, ob Schweißstöße mit größeren Luftspalten den Anforderun...

Fracture analysis (within the Fitness for Service (FFS) analysis) is rarely applied in ship structural design where fatigue is assumed to be the dominating failure mechanism. However, there are situations where FFS fracture analysis could be conducted to demonstrate the structural integrity of welds for a postulated defect size. Currently, maximum...

The welding of block joints in shipbuilding often creates much effort as the fabrication without margins leads sometimes to large gaps between them. Unfavourable may be high stresses which can occur due to constraints. For this reason a project was performed to investigate if butt joints welded with larger gaps fulfil the requirements. The objectiv...

In most engineering metallic structures, welded joints are often the locations for the crack initiation due to inherent metallurgical, geometrical defects as well as heterogeneity in mechanical properties and presence of residual stresses. In order to maintain structural integrity of welded structures for whole service life of the structure, relati...

Selective hypoaldosteronism is a rare cause of life-threatening salt wasting in the neonatal period. Patients are most frequently diagnosed with the clinical signs of aldosterone deficiency during the first week of life. In this case report, twin premature newborns who were diagnosed with different clinical presentations with hyperkalemia and hypon...

The volume fraction and the size distribution of strengthening secondary precipitates in laser beam welded sheets of Al-alloy AA6056 were studied non-destructively using small-angle neutron scattering. The volume fraction of precipitates was determined in the base material and the fusion zone for sheets welded in T4 and T6 tempers. Also, the effect...

Experimental and numerical studies were conducted to characterize laser and resistance spot welds to gain an understanding of load carrying capacity, temperature distributions and residual stress states of different joint geometries used in the automotive industry. Different laser spot weld path geometries are compared with conventional resistance...

Investigations were continued on the dissimilar laser beam welds of AA6056 and Ti6Al4V, fabricated by inserting Ti-sheet into the profiled Al-sheet and melting AA6056 alone. By using microstructure, hardness and strength as the criteria, sites exhibiting non-uniform microstructure and localized plastic deformation due to strength mismatch were inve...

Investigations on fatigue crack growth retardation due to single tensile and periodic multiple over load in strength undermatched laser beam welded 3.2mm thick aerospace grade aluminium alloy 2139-T8 sheets are conducted. The effect of overload on the fatigue crack propagation behaviours of the homogenous base metal and welded panels (200mm wide, c...

The joining of a thin section AZ31HP magnesium alloy was accomplished by laser beam welding in the autogenous mode using a Nd-YAG laser system. Micro hardness evaluation and slow strain rate tensile (SSRT) tests in air revealed that the weld metal had near-matching mechanical properties corresponding to that of the parent alloy. However, in terms o...

Sheets of AA6056 and Ti6Al4V were butt-joined by inserting the Ti-sheet into the profiled Al-sheet and by melting the Al-alloy alone using a split beam Nd:YAG laser. To study microstructural effects on properties, the Al-alloy was used in two tempers; T4 followed by post weld heat treatment T6, and in T6 followed by a defined duration of natural ag...

The development of joining processes for TiAl alloys is fundamental to integrate them into functional structures and to widen their application field. Diffusion bonding has become the most reported technique for joining TiAl alloys but have the disadvantage of requiring high temperature stages. Diffusion bonding of TiAl at the 950-1200°C temperatur...

Damage tolerance of an aerospace grade aluminum alloy was studied using a new design philosophy in skin and stringer geometries. Systematic thickness variations (crenellations) were introduced onto the skin and stringers of the laser beam welded (LBW) stiffened Al2139-T8 large center cracked flat panels to modify the stress intensity factor (SIF) d...

A study was carried out on laser and resistance spot welds in overlapped sheets of dual phase advanced high strength steel (DP780) and deep drawing steel (DC04) of 2˙0 mm in thickness. The aim of the study was to investigate the fatigue performance of these joints under tensile shear loading as well as the monotonic performance for applications in...

The prediction of crack extension and fracture load is very important with decreasing safety factors of future light-weight engineering structures. At the same time industry reduces the cost of experimental validation. Both developments create an increased need for advanced computer simulation. One very promising approach is the application finite...

Using laser welding in fabrication of metallic airframes reduces the weight and hence fuel consumption. Currently only limited parts of the airframes are welded. To increase laser beam welded parts, there is the need for a better understanding of crack propagation and crack-pore interaction within the welds. Laser beam welded Al-alloys may contain...

This paper presents a methodology for the assessment of the remaining load carrying capacity of thin-walled components under tension containing highly strength undermatched welds and edge cracks. The analysis is based on the strength mismatch option of the fracture module, part of the newly developed European fitness-for-service (FFS) procedure FIT...

This paper presents results of the analysis for residual strength prediction of two laser beam welded superalloys (Inconel 625 and 718) using the fitness-for-service (FFS) procedure FITNET. The analysis is based on Option 3 of the Fracture Module of the procedure arising from the European Community funded project FITNET (www.eurofitnet.org). Analys...

In the last years constraint has represented one of the major issues on fracture mechanics and structural integrity research. The need of more adjusted less conservative (and still safe) assessments requires, in many cases, the consideration of the constraint conditions in the crack tip in order to make better predictions of the load bearing capaci...

Gegenstand dieses Manuskripts sind Untersuchungen an einem gewalzten Mg-Magnesiumfeinblech der Dicke 2,5 mm aus AZ31-HP, welches in Stumpfstoßausführung mit und ohne Zusatzwerkstoffe laserstrahlgeschweißt wurde. Als Zusatzwerkstoffe wurden AZ31X und AZ61A-F in Spulendrahtform mit einem Durchmesser von 1,2 mm verwendet. Die mikrostrukturellen und me...

Microstructure and properties of a Mg AZ31B laser beam weld without filler are studied using electron microscopy, X-ray diffraction and mechanical tests. The microstructure of the weld is characterized by a narrow heat affected zone, columnar grains and precipitate coarsening in the fusion zone. Texture in the fusion zone is significantly different...

Ti-alloys, particularly TiAl, are becoming attractive for the use in the production of high-temperature components such as turbine blades and exhaust valves, owing to their low density. However, these components may not be cost-effectively cast totally from TiAl alloys and casting defects may occur in investment casting of these complex parts. Othe...

Cost reduction and weight saving are most important principles governing design and construction of aircrafts. Advanced alloys and thermo-mechanical treatments as well as new and optimized production processes are being developed. For example, welding of fuselage components like stringers or clips made of Al alloys can have several advantages over...

The residual stress distribution in three laser welded T-joint configurations of aerospace aluminium alloys were measured using neutron diffraction and FE-simulation was conducted to compare with the experimental results. A 2 mm thick AA 6013 T6 sheet (as clip) was welded to a 4.5 mm thick and 400 mm wide AA 6156 T4 base plate (as skin of the airfr...

Microstructure, hardness and residual stresses of the laser beam overlap welds between AZ31B sheets and AZ31, AZ61 and AZ80 extruded profiles are investigated using microscopy and X-ray diffraction. The result of the investigations reveal that weld microstructure, the size of the HAZ, precipitate density and the maximum compressive residual stress...

The effect of different welding sequences between a 4.5 mm thick AA 6156 T6 base plate and a 2 mm thick AA 6013 T6 clip - resembling a skin-clip joint of an airframe - using a 3.3 kW Nd:YAG laser is investigated. Under cyclic loading the breakdown of such T-joints happens at one end of the clip, which is due to local residual stress concentrations....

In the case of welded structures with cracks, a number of parameters, such as those with units of length, makes it difficult to present the results of numerical solutions in a form convenient for direct engineering applications, such as flaw assessment procedures. For centre-cracked components under tension, it is shown in the current article that...

The European FITNET consortium was convened in 2002 with the remit of preparing a procedure for fitness-for-service (FFS) evaluation of flawed engineering components. The procedure is intended to be used by a broad range of industries across Europe, and can be used at any stage in the life of an engineering component, eg design, fabrication, operat...

The paper gives concepts of FITNET software for Fracture module. In order to perform structure integrity assessment for component with real or assumed crack, it is necessary to vary material properties and crack geometry. Such approach can provide statistically reliable results for maximum loading capacity vs. crack size. Software can be useful and...

The European FITNET consortium was convened in 2002 with the remit of preparing a procedure for fitness-for-service (FFS) evaluation of flawed engineering components. The procedure is intended to be used by a broad range of industries across Europe, and can be used at any stage in the life of an engineering component, e.g. design, fabrication, oper...

In order to improve the damage tolerance, thickness variations (crenellations) were introduced onto skin and stringers of laser beam welded aluminum alloy 2139-T8 stiffened flat panels. This new panel design was tested under constant amplitude and modified Mini-Twist spectrum to determine the effect of crenellations on the fatigue crack propagation...

A Ti-6Al-4V rod and a γ-TAB rod 24.5mm in diameter and 100mm length were joined by friction welding. Quantitative phase analysis was carried out by high energy synchrotron radiation with a local resolution of 1mm over the welding seam. Rietveld calculations were done by MAUD using complete Debye-Scherrer cones to avoid the influence of crystallogra...

This paper investigates the potential of mechanical tensioning (MT) to reduce the magnitude of residual stresses in welds and to eliminate buckling distortion. Both friction stir (FSW) and arc welds have been produced from the aluminium alloy AA2024, with different levels of tensile stress applied along the weld line either during or after welding....

Recently a European community funded thematic network project (participation of 17 countries) FITNET (www.eurofitnet.org) has completed a new and unified engineering assessment procedure (FITNET FFS Procedure) of flaws in metallic structures and welds. This newly developed procedure (under CEN Workshop Agreement WA22) provides assessment rules for...

This study is carried out to investigate the laser spot welds (LSWs) of advanced high strength steel sheets of 1·0 mm thickness for application to the automotive industry. Mechanical properties and failure behaviour of LSWs for transformation induced plasticity steel sheets (TRIP800) subjected to monotonic coach–peel loading are investigated by exp...

The electron beam (EB) welding process is used to weld any metal that can be arc welded with equal or superior weld quality. EB welding is carried out in a high-purity vacuum environment, which results in freedom from impurities such as oxides and nitrides. Thus, pore-free joints can readily be achieved in metallic materials, such as Al-alloys and...

This paper gives the overview of the newly developed FITNET Fitness-for-Service (FFS) Procedure within the framework of the European fitness-for-service network — FITNET project. The FITNET project was a four and half years project with the objective of developing and extending the use of FITNET FFS Procedure for welded and non-welded metallic stru...

Recent developments of the advanced welding processes such as laser beam welding (LBW), solid state friction stir welding (FSW) and hybrid welding, numbers of advanced structures are being designed and constructed in industries such as aerospace, power generation, oil and gas transmission and transportation. Development of new structural aluminum a...

An increasing amount of laser beam welded T-joints (e.g. skin-stringer) of aluminium alloys are now in use in advanced fuselage applications designed as ‘integral structures’ for weight and cost savings. It is known that weld joints generally show lower strength (undermatching) than base metal in both laser beam and friction stir welded joints of 6...

Dissimilar welded components joined with any kind of welding technologies gain an increasing interest due to significant improvements in engineering structures by using new materials (alloys) or new materials combinations. The present paper deals with laser welding of A15083-H111 and A16013-T6 and the characterization of the crystallographic textur...

Este trabajo presenta una metodología para el análisis de la capacidad resistente de paneles delgados fisurados sometidos a tracción en los cuales se da el fenómeno del undermatch (límite elástico de la soldadura inferior al del material base). El análisis se basa en la Mismatch Option del modulo de fractura del recientemente desarrollado procedimi...

In this study, the stress corrosion cracking (SCC) behavior of samples fabricated from AZ31 Mg alloy by laser butt welding was investigated in slow strain rate tensile (SSRT) and constant load tests. The results show that the laser butt welded AZ31 Mg samples are highly susceptible to SCC. The failure of the samples occurred in the fusion boundary...

Hybrid welding is, as regards selection of welding parameters, a tolerant process. On the other hand, the weld seam and the heat affected zone may tend to be wider as in an arc process, which may be detrimental to mechanical stability. With CO2 laser beam butt welds as a basis for comparison, properties of butt welds of a peak-aged airframe alloy A...

Alternating nanometric layers of titanium and aluminium were used as filler material to promote joining between titanium aluminide samples. The improved diffusivity of these nanometric layers is thought to overcome the difficulties in solid-state joining of titanium aluminides without producing chemical discontinuities at the interface. In this stu...

In this study the distribution and magnitude of residual stresses in a T-joint of aerospace grade aluminium alloy weldment was determined using neutron diffraction. A 2 mm thick AA 6013 sheet (as clip) was laser beam welded to a 6 mm thick AA 6056 base plate (as skin) to resemble the “short distance” welded clip-skin joints of an airframe. The tota...

The non-destructive and phase selective determination of residual stresses caused by material processing (such as welding) in polycrystalline samples is usually performed by diffraction methods. In order to obtain information about stress fields at high spatial resolution with conventional methods, for example with micro beam techniques, the sample...

Residual stresses in CO2 laser beam welded AA6056 Al-sheets of 3.2 and 6.0 mm thicknesses were studied using neutron and high-energy X-ray diffraction. The influence of the temper T4 and T6 before welding, the effect of sheet thickness in T6 temper, and the effectiveness of post-weld heat treatments T6 and T78 for the reduction of residual stresses...

TiAl alloys are potential candidates for replacing conventional Ti-alloys in gas turbine applications in the relatively lower temperature sections, owing to their low density and excellent high temperature properties. However, their intolerable ambient temperature brittleness hinders their use in such applications. Recently, TiAl alloys with some r...

The present investigation compares the mechanical properties of cold-sprayed and thermally sprayed copper coatings. The mechanical properties of the Cu-coatings are determined by in plane tensile test using micro-flat tensile specimen technique. A deeper view into the type of obtained defects, their stability and their influence on coating performa...

Dieses Manuskript beschreibt das Reibschweißen der intermetallischen γ-TiAl-Basislegierung Ti-47Al-3.5(Mn+Cr+Nb)-0.8(B+Si) im heißisostatisch gepressten Feingusszustand. Die mechanischen und mikrostrukturellen Eigenschaften der γ-TiAl-Reibschweißverbindung werden untersucht und dargestellt. Es wird gezeigt, dass die Reibschweißverbindung sowohl bei...