Tayfun Soysal

Tayfun Soysal
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Iğdır Üniversitesi · Mechanical Engineering

Doctor of Engineering

About

20
Publications
10,638
Reads
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470
Citations

Publications

Publications (20)
Article
Full-text available
5xxx series aluminum (Al) alloys are recommended over the other wrought aluminum alloys for their relatively better weldability; however, some studies reported serious cracking in these alloys during welding. The weldability of these alloys has been investigated both experimentally and theoretically with respect to solidification cracking susceptib...
Chapter
Full-text available
Bu çalışma bir otomotiv fabrikasında iş güvenliği kültürünün incelenmesini amaçlamaktadır. Çalışma kapsamında, iş güvenliği kültürünün bileşenleri, bu kültürün çalışanlar üzerindeki etkileri ve iş kazalarını önlemedeki rolü ele alınacaktır. Ayrıca, iş güvenliği kültürünün geliştirilmesine yönelik stratejiler ve uygulamalar da tartışılacaktır. Çalış...
Book
Full-text available
This new book is part of the serries of Engineering Sciences. In this book, the chapters include new developments in the study areas related to Civil Engineering, Materials Science and Engineering and Mechanical Engineering. Simulations to calculate the material properties or design factors approach to the certainty of experiments. In the first cha...
Chapter
Full-text available
In welding, hot cracks are observed during the fusion welding of materials, therefore these cracks do not occur in solid state welding. Spot welding is among the fusion welding processes because the metal is being melted during welding. Hot cracks have been observed in various spot-welded materials. In this chapter, an introduction of hot cracks in...
Article
Full-text available
Solidification cracking is concerning for welding stainless steels. The susceptibility of different kinds of stainless steels to the weld defect of solidification cracking was predicted using the susceptibility index of maximum | dT/d(f S) 1/2 | (T: temperature, f S : fraction solid). Commercial thermodynamic software with a solidification model wh...
Chapter
Full-text available
Bu bölümde CALPHAD yöntemi dengesiz soğuma şartları altında katılaşan kaynak malzemesinin mikroyapısında oluşan fazları tahmin etmede kullanılacaktır. Bu amaçla sürünmeye dayanaklı olarak geliştirilen magnezyum esaslı magnezyum-alüminyum-stronsiyum (Mg-Al-Sr) alaşımları seçilmiştir. Bu alaşımların CALPHAD yöntemi ile soğuma verileri elde edil...
Article
Full-text available
The recently developed transverse-motion weldability (TMW) test, in which a motor pushes the lower sheet in lap welding at velocity V to induce solidification cracking, has been applied to the 2000-, 6000- and 7000-series Al alloys but not the 5000-series. Here, alloy 5052 was TMW-tested under essentially identical conditions including the motor to...
Article
Full-text available
Solidification cracking is a concern for welding magnesium (Mg) alloys. An index, the maximum │dT/d(fS)1/2│,was used with the thermodynamic software Pandat to make solidification cracking susceptibility predictions for AZ-Mg arc welds which have the main alloying elements of aluminum and zinc in the magnesium matrix. The effect of AZ101 magnesium f...
Article
Full-text available
6xxx series of aluminum alloys are prone to cracking when fusion welded without a proper filler metal. Alternatively, these alloys can be welded by rotary friction welding, a solid-state welding process, without using another material. However, the use of the correct parameters for the rotary friction welding process is a key to get sound welds. In...
Conference Paper
Ternary Mg-Al-Ca alloys are known to have good creep-resistance and used in lightweight applications. Four Mg-Al-Ca alloys: Mg-4Al-2Ca, Mg-4Al-4Ca, Mg-5Al-3Ca and Mg-6Al-3Ca have been gas tungsten arc welded without using filler metal to observe the welding microstructure. The welding conditions and parameters were as follows: 100 A DCEN current, 1...
Article
Full-text available
Various tests have been proposed to assess solidification cracking susceptibility. A new solidification cracking test, called the stationary weld pool deformation test, is introduced in the present study. The test employs a stationary weld pool during testing, and it is conducted by joining two square small workpiece with spot gas tungsten arc weld...
Article
Full-text available
Carbon steels can be sensitive to solidification cracking. Predicting their susceptibility to solidification cracking can save cost and time compared to testing, and it can be very useful for designing new steels or welds. Crack susceptibility predictions were made for carbon steels using the recently proposed simple susceptibility index for cracki...
Conference Paper
Full-text available
Weldability of carbon steels is a concern due to their susceptibility to solidification cracking. Predicting crack susceptibility of the steels can help designing new alloys or welds. Crack susceptibility predictions of commonly used AISI 1018 and 1045 carbon steels have been made based on the maximum │dT/d(fS)1/2│, crack susceptibility index, usin...
Article
Full-text available
Aluminium alloys are susceptible to solidification cracking. A criterion was derived to determine whether an aluminium alloy is susceptible to cracking utilising a recently proposed cracking index, maximum dT/ d(f S )1/2 near (f S )1/2 = 1 where T is the temperature and f s is the frac- tion of solid, and aluminium-binary phase diagrams under limit...
Article
Full-text available
The solidification cracking susceptibility of aluminium alloys 2024, 2219, 6061 and 7075 was evaluated recently by the transverse motion weldability test (the lower sheet moved in the transverse direction of lap welding to cause cracking). The tested welds were analysed in the present study. Their transverse cross-sections showed wide backfilled cr...
Article
Full-text available
The susceptibility to solidification cracking was predicted for aluminium welds of 2024 Al made with filler metals 2319, 4043 and 4145 Al and of 6061 Al made with filler metals 4043 (traditional) and 4943 Al (new, higher strength). The maximum |dT/d(fS)1/2| (T: temperature; fs: fraction of solid) was used as the crack susceptibility index. In each...
Article
The effectiveness of filler metals in reducing solidification cracking in welds of 2024 Al and 6061 Al was examined, these two Al alloys being highly susceptible to solidification cracking. The effectiveness was evaluated by the transverse motion weldability (TMW) test. 2024 Al was welded with filler metals 2319 Al, 4043 Al and 4145 Al. 4043 Al and...
Article
Full-text available
Solidification cracking is a serious weld defect, and it is essential to test the susceptibility to this defect. In Varestraint testing, the workpiece is bent suddenly during welding to induce cracking. This causes an unrealistically high deformation rate, and the global deformation rate of the workpiece cannot reveal the local deformation rate of...
Article
Cracking during solidification is a serious defect in welding and casting. The crack susceptibility of one Al alloy relative to that of another has been predicted recently using the maximum steepness |dT/d(fS)1/2| as the crack susceptibility index, where T is temperature and fS the fraction solid. To check the validity of predictions based on the i...
Article
Solute segregation on a macroscopic scale in a weld between two dissimilar metals or alloys has long been recognized, but fundamental understanding of macrosegregation in dissimilar-metal welding is still lacking. Two mechanisms for macrosegregation were proposed based on the liquidus temperature of the bulk weld metal, TLW, relative to the liquidu...

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