Yudy Surya Irawan

• Dr.Eng.(Doctor of Engineering)
• Lecturer at University of Brawijaya

This study aims to optimize the design parameters of a fiberglass filler circular crash box to enhance Energy Absorption (EA) capabilities under frontal loading conditions. Utilizing Response Surface Methodology (RSM) and a Box-Behnken Design (BBD), the research comprises 15 experiments to assess the impact of three primary parameters: foam diamete...

Fuel efficiency and occupant safety are among the most critical concerns in the automotive industry. Motivated by the significance of this field, this research aims to enhance the crashworthiness of vehicle crash absorbers. This study examines the crush response of a re-entrant auxetic square tube under quasi-static compressive loading. Re-entrant...

AISI 1020 steel is low-carbon steel with a carbon content of 0.20% and good ductility but low hardness. One of the methods to increase the hardness is by infusing carbon. The addition of carbon, called carburizing, was done by heating at a high enough temperature, namely at austenite temperature, in an environment containing active carbon atoms so...

In previous studies, hybrid crash boxes have been developed because it show better energy absorption characteristics. Circular hybrid crash box combine the advantages of low-density of composite with stable deformation of metal provide a potential energy absorption device. Tests were carried out experimentally and iumerically under frontal load. Th...

Crash box development is carried out continuously to obtain a lightweight design and high energy absorption. This dataset presents the results of a crash box experiments. Quasi-static testing of aluminum, honeycomb, and hybrid tube specimens was carried out using a universal testing machine. The load given in the quasi-static test was a constant lo...

Steam Power Plant generates electricity due to a device that extracts heat energy from steam and converts it into mechanical work on the rotor. Turbines operate at high pressures and temperatures which may cause potential failures in the rotor. This study aims to determine the stress distribution on the turbine rotor to predict potential failures....

Bacterial cellulose (BC) is a natural substance produced by microorganisms and offers numerous benefits. It can be produced by utilizing biomass waste which is abundantly available through fermentation process. This study investigates the utilization of pineapple peel waste for BC synthesis and observes their properties as nanocomposite membranes a...

Crashworthiness is related to the ability of a structure to reduce the effects of a collision risk of injury to passengers and the risk of damage to vital parts of the vehicle. Geometry design of crash box is one important parameter to increase crashworthiness performance by increasing energy absorption through progressive deformation. In previous...

Circulating Fluidized Bed (CFB) boiler often experience leaks in the wall tube due to corrosion and abrasion of the bed material after use that varies between 3 and 8 months. To avoid erosion corrosion, a coating was done in the form of Chrome Clad Tube Armor (CTA). In this research, a Failure Analysis (FA) was performed on the characterization of...

Bacterial cellulose (BC) is a natural substance produced by microorganisms and offers numerous benefits. It can be produced by utilizing biomass waste which is abundantly available through the fermentation process. This study investigates the utilization of pineapple peel waste for bacterial cellulose synthesis and observes their properties as nano...

Motorcycle users in 2019 reached 133,617,012 units in Indonesia. The impact of a large number of motorcycle certainly attracts the interest of the industry to produce two-wheeled automotive vehicles. The piston is part of the engine that functions as a compression barrier in the combustion chamber, the piston material is aluminum alloy. Therefore,...

This study aims to control the characterization and mechanical properties of smelting Al-Cu Alloy through Hold-Melt Time. This research uses aluminum scrap and copper wire scrap to produce quality as-cast ingots, clean the environment, and increase waste utilization. Copper melting point of 1083 °C is immersed in molten aluminum at a temperature of...

This research aims to obtain the optimal honeycomb hybrid crash box design. Finite elements, parametric studies, and multi-objective optimization are carried out sequentially. Parametric studies are carried out to obtain important parameters to increase energy absorption and minimize mass. The effect of structure angle, honeycomb side length, and s...

SA 210C is the material for tube boiler which is generally coated with Fe-based and Ni-based to increase its resistance at high temperature. The methods of thermal spray coating which is mostly performed on the material is wire arc (WA) spray and high velocity oxy-fuel (HVOF) have different cost and coating characteristics. Thermal spray coating wi...

The crashworthiness of a railway vehicle has been developed to provide energy absorption capacity and efficiency of energy absorption. This study presents a computer simulation to determine the energy-absorbing structure of the new addition of a crash box design on the Indonesian high-speed train in a collision scenario. The crashworthiness analysi...

Anticipating an alloy's corrosion resistance is essential to avoid product failure and reduce costs. Research and analyze the corrosion resistance of Al-Cu, Al-Zn and Al-Cu-Zn alloys based on the analytical balance of the elements according to weight, thermodynamic, metallurgical rules on metal alloys, kinetic and other properties. The purpose of t...

In the current study, the effect of friction coefficient on strain distribution and deformation was investigated with the computer simulation providing a better understanding of the material flow mechanism and deformation behavior in the ECAP. The 10×10 mm and 50 mm-long rectangular billet was used as the geometry of aluminum material. The geometry...

This study aims to determine the effect of milling time and sintering temperature parameters on the alumina transformation phase in the manufacture of Aluminium Matrix Composites (AMCs) reinforced by 20 % silica sand tailings using powder metallurgy technology. The matrix and fillers use waste to make the composites more efficient, clean the enviro...

This paper aims to investigate the joining of polypropylene using friction stir welding (FSW). FSW parameters were the rotation speed of 620 rpm, the travel speed of 7.3 mm/min, and 13 mm/min. The tensile test was performed using a universal testing machine, and the results of the tensile test were related to the crystallite size and degree of crys...

Welding is one of the metal joining processes in manufacturing. CDFW (continuous drive friction welding) is a welding process to join two workpieces by applying pressure at one end of the object and rotating another one where the friction action applies at interface. The purpose of this study is to study temperature distribution on the surface of t...

The paper discusses the comparison of pack carburizing-nitriding SUS 316 with gas Nitrogen. The purpose of this study was to increase the hardness and corrosion resistance of SUS 316. The research used a pack carburizing-nitriding method with gas type Welding Grade (WG) and Ultra High Purity (UHP). The pack carburizing process uses teak wood activ...

The paper reports measurement of tensile strength and the thermal cycle of AA6061 aluminum alloy circular bar friction weld with different diameters and various friction times. A continuous drive friction welding (CDFW) of AA6061 was conducted to weld the AA6061 circular bar with different diameters of 30 mm for the rotating part and 15 mm for the...

Carbon thin films on SKD11 steel were deposited by 40 kHz frequency plasma sputtering technique using a waste of battery carbon rods in argon plasma, and their mechanical properties were investigated by various target-substrate distances (1 cm, 1.7 cm, 2 cm, and 2.4 cm). The power used is 340 watts, the vacuum time is 90 minutes, and the gas flow r...

The development of technology has increased the need for composite materials, where the technology of composite materials with natural fiber reinforcement is growing. The existence of natural fiber is very abundant, and it has not been fully utilized. Until now, the use of coconut fiber was still limited to the furniture and household handicraft in...

The material processing technology was developed to answer the increasing material needs. The material developed is a composite material based on natural fibers. Among many natural fibers and maximum utilization is coconut fiber. This study aims to determine the effect of limestone as a medium for coconut fiber immersion on the tensile strength of...

In the previous study, Continuous Drive Friction Welding (CDFW) had been investigated to determine the strength of joining, burn off, and temperature distribution. In this study, Dissimilar Metal CDFW was studied to assess temperature cycle analysis. Aluminum 6061 (A6061) workpiece was fixed, and an AISI 304 was rotated at 1,000 rpm. The temperatur...

The investment casting method has several advantages, namely the ability to mold complex objects, create products smooth surface and high precision. This is closely related to the wax pattern used, if the wax already has a precision geometry with a precise shrinkage estimation during the casting process, the product will be in accordance with the p...

Abstract— Processing of natural fibers as a support material for composite materials has been widely carried out. Some studies use chemicals as a medium for processing fiber while the treatment with natural ingredients has not been done much. This study discusses the ability of the matrix to penetrate the coconut fiber. Coconut fiber that has bee...

Lemon is an environmentally friendly electrolyte. However, an innovative concept is needed to improve the quality of lemon electrolytes. The purpose of this study is to investigate the effect of activated carbon catalyst addition on the voltage and current electric generated from liquid lemon (C6H8O7) and NaOH. Lemon juice group containing acetone...

Metal casting with investment casting method is metal casting which has the ability to produce accurate parts and has a controlled fineness. Current technological developments are very influential in the development of investment casting. One of them has been found mold-lay filament as a substitute for wax, which is now wax is one of the main compo...

Battery waste is one of waste that can damage the environment and there has not been much good processing in Indonesia. Even though, battery waste contains carbon which can be used as a target material for deposition of carbon films using plasma sputtering. The focus of this research is to determine the effect and optimum power value of plasma argo...

Many researches on welding efficiencies have already been conducted, but very few of them take attention on energy usefulness in workpiece welding zone. Energy usefulness profile can be used as a reference in developing a thermodynamics model to predict post welding material properties and material behavior. The aim of this study is to obtain energ...

Processes for increasing the hardness value of steel are among the most challenging in industrial applications. SKD11 steel is one of the steels that is commonly used in industry (building, transportation facility construction, and production of various kinds of scissors such as knife-edge mold, scissors, circular saw blades, and metal stamping mol...

Utilization of marble waste as a metal matrix composite reinforcement during the powder metallurgical process, with pure aluminum powder as the main ingredient, is intended to obtain a holding time for the sintering process at a temperature of 650oC in order to produce aluminum–marble composites with optimal hardness, density, and porosity. Marble...

This study aims to identify the effect of immersion of coconut fiber in limestone water on surface morphology and tensile strength, including chemical reactions during immersion. Coconut coir fibers were immersed in a solution of limestone water for 0, 4, 8, 12, 16, and 20 hours, with a mass fraction of limestone of 5%, then dried for 1 hour. Cocon...

This article explains usage of the ultraviolet irradiation method on Beauv cylindrical (L) imperata fibers as a new way of natural fiber treatment, based on the absorption of ultraviolet rays containing other elements that lead to lignin degradation, which enhances natural fiber strength. Using the ultraviolet exposed fiber method with intervals of...

This article explains the use of the response surface method to produce the optimum tensile strength for the joining of dissimilar metals with the continuous drive friction welding method. The joining of dissimilar metals is one of the biggest challenges in providing industrial applications. Continuous drive friction welding has been extensively us...

The aim of this study was to investigate the crystallinity changes and degradation of polypropylene due to heat generated by friction stir welding, i.e., heat generated by friction between the rotation tool and the welded materials. The tool pin was rotated at 620 rpm in the welding process. The travelling speed was varied between 7.3 mm/minute and...

Research has been performed using a pulsed electric field (PEF) to damage plant cells to obtain bioactive compounds before extraction. However, research into the use of PEF to break down the glandular trichome (GT) cells of patchouli for essential oil extraction is still limited. The purpose of this study was to determine the specific energy input...

The origami pattern crash box has the advantage of producing a predictable mode collapse because it has a pre folded pattern. Investment casting method can be used in the manufacture process of an origami pattern crash box because it can make a complicated product and does not require a lot of machined processes. This study used traditional investm...

This paper revealed anisotropic torsion strength of round bar aluminium alloys A6061 friction weld joint affected by upset force. Round bar A6061 was used for friction welding specimen with two different geometries which were the specimen with flat friction surface (without chamfer angle) and the specimen with chamfer angle of 15 degree. Continuous...

An effort to increase the tensile strength of dissimilar friction weld joint of round bar A6061/S15C was done in this study using upset force and one-side chamfer angle. Commercial round bar aluminum alloy A6061 and carbon steel S15C were used as rotated and a stationary part, respectively in continuous drive friction welding (CDFW) process. Upset...

Crash box serves as a kinetic energy absorber during collision. It has a tube shape, which is located between bumper and chasis. The crash box design requires development in order to reduce buckling mode and obtain symmetry folding mechanism, so it will achieve greater energy absortion. The researchers find a method to reduce tension due to impact...

This research examines the role of bio-activator, papaya latex in the synthesis of nanoporous carbon fibre made of the coal of coconut shell with aluminum oxide. The porous carbon was generated from coal activated by the papaya latex at the temperature of for 4 h. The high energy milling (HEM) process up to 600 thousand cycles was applied to the po...

This study reveals the tensile strength and IFSS of a single fiber Imperata cylindrica (L) Beauv treated by a ultraviolet light exposure process. This plant is a wild plant and rapidly proliferating plant. It has been traditionally used by people for house roofs and goods binder. This study aims to determine the tensile strength and IFSS of the mat...

This paper aims to analyze the effect of pressure and holding time in the upset stage on tensile strength and macro-microstructures of continuous drive friction welded (CDFW) joints of aluminum alloys A6061. Friction weld specimens were welded using variations of upset pressure (40, 80, 120 MPa). The upset holding time was varied from 3, 10, to 20...

The manufacture of porous ceramic membrane based on natural zeolite and palm fibers was done. Zeolite powders were sieved using 80 mesh and 120 mesh sieves. Moreover, the size was in the range from 80 mesh to below 120 mesh. It was mixed with palm fibers with diverse percentages of 0%, 5%, 10%, 15%, and 20% wt palm fibers. Preparation of mixing raw...

In this study we examined the effect of topography and corrosion resistance of aluminum alloy 6061 which has been anodized on a mixture of phosphoric acid and oxalic acid by using titanium cathode. Surface topography was tested with the N8 NEOS Bruker, corrosion testing performed by Tafel method using a potentiostat Autolab (PGSTAT302N), while test...

The objective of this research was to investigate the effect of friction time and friction pressure on the tensile strength of the joining of two dissimilar materials, aluminum alloy AA6061 and carbon steel, with continuous drive friction welding process. Variations of friction times of 5 seconds, 7 seconds, 9 seconds, and 11 seconds, at each varia...

The results of researches of possibilities of increasing the mechanical properties of pig iron with ball-bearing graphite of brand FCD-50 by the combined heat treatment are described. The scheme of multistage heat treatment, the characteristic feature of which is the operation of cooling in liquid nitrogen, is proposed. The use of such a scheme all...

This investigation discusses fatigue crack propagation behaviors on the welded joint of Hot Rolled Quench Tempered Steel (QTS) in which during welding process the fusion zone of the joint was subjected to magnetic flux field. The QTS weldability is not really excellent due to the change of microstructure into tempered martensite, and the possibilit...

Cutting fluids provide a challenge to reduce environmental effects. This study discusses aloe vera cutting fluid (AVCF) as an environmentally friendly alternative to oil-based cutting fluids mixed with water 1:5 (OBCFM). A turning process with low cutting speed (20.232 m/min) requires high cooling power. The turning process was conducted (cutting s...

Natural zeolite ceramic is a material that can be used as bioceramics but it is fragile to crack. The weakness of ceramics can be overcome by making ceramic metals. The use of SS316 (stainless steel 316) fiber to strengthen the zeolite ceramic had been done in order to determine the interfacial relationship by using a fiber pull-out test. The conte...

This study is aimed at determining the lattice strain distribution of Aluminium after having been deformed using the equal channel angular pressing (ECAP) process. The Sample is Aluminium alloys series 5052. ECAP process was conducted in steel dies at ambient temperature with Molybdenum disulphide as solid lubricant. The ECAP dies has 105° channel...

There are thousands of different fibers in the world and in fact, only a few of these fibershave been studied. This report concentrates on the chemical, and tensile strength properties of corn husk fibers treated NaOH 5% for 2 h.The result indicates that the alkali treatment with NaOH 5% removed the hemicelluloses and lignin in the fibers and decre...

The purpose of this study was to evaluate fracture resistance in AISI 304. The J-R curve was constructed from data, which resulted from an impact test by Charpy Impact machine equipped with high-speed sampling rate data acquisition equipment. The critical values of fracture resistance in fusion zones (FZ), high temperature heat affected zones (HTHA...

The use of titanium as a cathode in the anodizing process AA 6061 proved to increase the mechanical strength and corrosion resistance. The surface morphology is tested by using scanning electron microscopy (SEM) and then the surface composition is tested by using Energy Dispersive X-ray (EDX). Hardness is tested using microvickers hardness tester t...

ABSTRACT Effect of friction time, upset force and one-side cone geometry on torsion strength of A6061 round bar friction weld joint was studied. Round bar commercial A6061 was friction welded with initial compression force of 2.5 kN on stationary part and the rotated part had revolution speed of 1600 rpm with variation of friction time of 45, 50 an...

The improvement of mechanical properties of cantala fiber and its composites. Treatments including alkali, silane, and the combination of both were carried out to modify the fiber surface. The influence of chemical treatments on fiber properties such as the degree of crystallinity and tensile strength was investigated. A variety of short cantala fi...

The aim of the study was to compare the hardness properties resulting after the nitriding fluidized bed thermochemical treatments in different media and the diffuse temperature process, to evaluate the efficiency of the white layer formation on stainless steel substrats. The White layer is a layer with a high nitrogen atom concentration between the...

This paper focuses on the chemical, physical, and mechanical properties of corn husk fibers treated with different concentrations of NaOH (0.5%, 1%, 2%, 5%, and 8%) for 2 h. The results show that treatment with NaOH removed the hemicellulose and lignin in the fibers and decreased the moisture content. Consequently, the chemical, physical, and mecha...

The study is to determine the ingredients effect the turmeric (Curcumae longae) treatment of Akaa (Corypha) midrib fiber, toward the surface morphology and chemical properties. The material used was a natural fibers, soaking in water 1 hour, by heating a turmeric solution 1 hour (TT1), 2 hours and 3 hours. The heating of 86°C - 90°C at 1 atmosphere...

The study was aimed to determine the role of pulsed electric field (PEF) treatment before hydro-distillation of the patchouli oil. Response Surface Methodology (RSM) was employed to optimize PEF treatment (voltages, frequencies) and times of distillation of patchouli oil from dried patchouli crops. The experimental design and analysis the result to...

The influence of chemical treatments on the properties of cantala fiber as well as on the quality of the interfacial bonding of cantala fiber/rHDPE was investigated. The fibers were treated with alkali, silane, and a combination of both. The results showed that the loss of hemicellulose and lignin after the alkali treatment, and the presence of a s...

Lately, the membrane of porous ceramics begin to increase its utility since it contains good and supportive chemical substances, besides it is also resistant to heat and has stable force. However, its price is considered quite expensive because this type of ceramics is made from materials and is produced through complicated process. This study aims...

This study presents the using of chamfer angle could increase torsion and impact strength of the CDFW joint. Torsion and impact strength tests were conducted by using the specimens from round aluminum A6061 CDFW specimens that have chamfer angles of 15°, 30°, 45°, 60, 75° and no chamfer angle in both side of friction contact area. The testing resul...

The objective of this study is to reveal the morphology, physical properties and strength of the king pineapple leaf fibre (Agave Cantala Roxb) after fumigation treatment. The king pineapple leaf fibres (KPLF) before and after the fumigation treatment are then separated into groups. The fumigation treatment on KPLF is given in different durations,...

This study investigates the acoustical and nonacoustical properties of composites using corn husk fiber (CHF) and unsaturated polyester as the sound-absorbing materials. The influence of the volume fraction of CHF on acoustic performance was experimentally investigated. In addition, the nonacoustical properties, such as air-flow resistivity, porosi...

Layout of the existing machines using cell system has been applied since 2005 and the machine operators have known the weaknesses, so it is necessary to improve the layout of the machines. This study was conducted to improve the machines layout cartridge case production by using Systematic Layout Planning and Blocplan with quantitative and qualitat...

The purpose of this research is to find the effect of volume fraction variation of “gelam” bark fiber on tensile and impact strength of polyester composite. The filler material was the “gelam” bark fiber with volume variation ratio of 10%, 30 %, 50 % and 70 %. Alkalization of the “gelam” bark fiber used 5% of NaOH and 2 hours of soaking time. Mecha...

Over the previous few years, natural fibers have been used as the main reinforcement for composite materials. Natural fibers have been offering many advantages in the recent years. The benefits of natural fiber composites that compared to composites with synthetic fiber reinforcement are low price, low density, being easily separated, being abundan...

The surface layer characteristics of the AISI 4140 tool steel treated by nitriding gas before and after hard chrome plating utilizing pure nitrogen diffusion media (fluidized bed reactor) and the without gas (muffle reactor) has been studied experimentally. The result shows that nitriding substrate with hard chrome layers has nitrogen atoms concent...

Manufacturing a porous ceramic specimen from natural zeolite materials mined in Malang, Indonesia was conducted by using a low temperature sintering. In this study, a porous ceramic property with rectangular shaped and prism shaped fillets at each end were sintered at 800-900°C and finally were investigated. Density and porosity measurements were p...

This paper was intended to figure out the corrosion resistance and surface morphology of AA6061 that is anodized with 1M phosphoric acid and cathode titanium in several potential variations. The surface morphology was examined by scanning electron microscopy (SEM), the surface roughness was investigated by Portable Surface Roughness Tester and fina...

This paper describes the effect of single cone geometry of friction area on torsion strength of continuous drive friction weld (CDFW) joint of round bar aluminum alloys A6061. Single cone geometry on friction area was determined with ratio of upper diameter (D1) and lower diameter (D2), D1/D2 of cone. Ratios of D1/D2 used were 0.02, 0.25, 0.65, 0.8...

A ZnPc functional layer has been successfully synthesized on QCM biosensor with polystyrene interlayer. Two evaporation techniques were utilized to deposit the ZnPc on the polystyrene interlayer i.e. liquid evaporation technique and solid evaporation technique. Deposition parameters of each technique affect the thickness and microstructure of layer...

The impact fracture toughness of zeolite reinforced high density polyethylene (HDPE) composites which were prepared by an injection molding has been investigated using essential work of fracture (EWF) concept. The Charpy impact tests were carried out on single-edge-notched bending specimens under velocity of 3.4 m s-1. The results showed that the c...

Hot Roll Quench Tempered Steel (QTS) is term of hot roll steel which produced by PT. Krakatau Steel with carbon content 0.29 %C that given by martempering treatment. Martempering treatment meant to increase the steel hardness for about 500 BHN, thus it cannot be penetrated by bullet. QTS designed as alternative material for industrial supporting of...

The purpose of this study is to find out the fumigated king pineapple leaf fiber (KPLF) engagement capability behavioural (IFSS) toward the epoxy matrix. The king pineapple leaf fiber fumigation treatment was under a time length of 5, 10, 15, 20 hours with the source of smoke from burning coconut shells and also comparing the KPLF without any fumig...

This study reveals the effect of surface roughness and chamfer angle on tensile strength of Continuous Drive Friction Weld (CDFW) joint of round aluminum A6061. CDFW specimens had chamfer angle of 15, 30, 45 degree and no chamfer angle. The both chamfered friction area of the specimens had surface roughness of 0.697, 0.9 and 1.067 μm. From the tens...