The Experts below are selected from a list of 10278 Experts worldwide ranked by ideXlab platform
Muammer Koc - One of the best experts on this subject based on the ideXlab platform.
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experimental investigations on wear resistance characteristics of alternative die materials for stamping of advanced high strength steels ahss
International Journal of Machine Tools & Manufacture, 2009Co-Authors: Omer Necati Cora, Muammer KocAbstract:Newer sheet alloys (such as Al, Mg, and advanced high-strength steels) are considered for Automotive Body panels and structural parts to achieve lightweight construction. However, in addition to issues with their limited formability and high springback, tribological conditions due to increased surface hardness and work hardening necessitate the use of alternative microstructurally improved die materials, coatings, and lubricants to minimize the wear-related die-life issues in stamping of advanced high-strength steel grades. This study aims to investigate and compare the wear performances of seven different, uncoated die materials (AISI D2, Vanadis 4, Vancron 40, K340 ISODUR, Caldie, Carmo, 0050A) using a newly developed wear testing device. DP600 AHSS (advanced high-strength steel) sheets were used in these tests. It was concluded that the tested die materials demonstrated higher wear resistance performance when compared to the conventional tool steel AISI D2 die material.
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experimental investigations on wear resistance characteristics of alternative die materials for stamping of advanced high strength steels ahss
ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME ASME International Conference on Materials and P, 2008Co-Authors: Omer Necati Cora, Muammer KocAbstract:Newer sheet alloys (such as Al, Mg, and advanced high strength steels) are considered for Automotive Body panels and structural parts to achieve lightweight construction. However, in addition to issues with their limited formability and high springback, tribological conditions due to increased surface hardness and higher work hardening effect necessitate the use of improved alternative die materials, coatings, lubricants to minimize the wear-related issues in stamping of such lightweight materials. This study aims to investigate and compare the wear performances of seven (7) different die materials (AISI D2, Vanadis 4, Vancron 40, K340 ISODUR, Caldie, Carmo, 0050A) using a newly developed wear testing method and device. We used DP600 sheets in the tests. Our results showed that almost all of the recently developed specially-alloyed die materials demonstrated higher wear resistance performance when compared with the performance of AISI D2 die material.Copyright © 2008 by ASME
Omer Necati Cora - One of the best experts on this subject based on the ideXlab platform.
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experimental investigations on wear resistance characteristics of alternative die materials for stamping of advanced high strength steels ahss
International Journal of Machine Tools & Manufacture, 2009Co-Authors: Omer Necati Cora, Muammer KocAbstract:Newer sheet alloys (such as Al, Mg, and advanced high-strength steels) are considered for Automotive Body panels and structural parts to achieve lightweight construction. However, in addition to issues with their limited formability and high springback, tribological conditions due to increased surface hardness and work hardening necessitate the use of alternative microstructurally improved die materials, coatings, and lubricants to minimize the wear-related die-life issues in stamping of advanced high-strength steel grades. This study aims to investigate and compare the wear performances of seven different, uncoated die materials (AISI D2, Vanadis 4, Vancron 40, K340 ISODUR, Caldie, Carmo, 0050A) using a newly developed wear testing device. DP600 AHSS (advanced high-strength steel) sheets were used in these tests. It was concluded that the tested die materials demonstrated higher wear resistance performance when compared to the conventional tool steel AISI D2 die material.
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experimental investigations on wear resistance characteristics of alternative die materials for stamping of advanced high strength steels ahss
ASME 2008 International Manufacturing Science and Engineering Conference collocated with the 3rd JSME ASME International Conference on Materials and P, 2008Co-Authors: Omer Necati Cora, Muammer KocAbstract:Newer sheet alloys (such as Al, Mg, and advanced high strength steels) are considered for Automotive Body panels and structural parts to achieve lightweight construction. However, in addition to issues with their limited formability and high springback, tribological conditions due to increased surface hardness and higher work hardening effect necessitate the use of improved alternative die materials, coatings, lubricants to minimize the wear-related issues in stamping of such lightweight materials. This study aims to investigate and compare the wear performances of seven (7) different die materials (AISI D2, Vanadis 4, Vancron 40, K340 ISODUR, Caldie, Carmo, 0050A) using a newly developed wear testing method and device. We used DP600 sheets in the tests. Our results showed that almost all of the recently developed specially-alloyed die materials demonstrated higher wear resistance performance when compared with the performance of AISI D2 die material.Copyright © 2008 by ASME
Mara Cristina Lopes De Oliveira - One of the best experts on this subject based on the ideXlab platform.
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materials selection for hot stamped Automotive Body parts an application of the ashby approach based on the strain hardening exponent and stacking fault energy of materials
Materials & Design, 2014Co-Authors: Renato Altobelli Antunes, Mara Cristina Lopes De OliveiraAbstract:Abstract Complex stamping operations are becoming widespread in the Automotive industry to produce vehicle Body parts with adequate mechanical strength and reduced wall thickness. The need for weight reduction drives the development of new metallic materials capable of achieving a good balance between formability and mechanical properties. Advanced high strength steels play a major role in this scenario. The aim of this work was to develop a materials selection strategy for hot stamped Automotive Body parts using the Ashby approach. The selection process was based on the formability of metallic alloys derived from two fundamentals materials properties, the strain hardening exponent and the stacking fault energy.
Shuxin Wang - One of the best experts on this subject based on the ideXlab platform.
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design of lightweight multi material Automotive bodies using new material performance indices of thin walled beams for the material selection with crashworthiness consideration
Materials & Design, 2011Co-Authors: Hongwei Zhang, Lianhong Zhang, Shuxin Wang, Jeonghan KoAbstract:Currently, Automotive bodies are constructed usually using a single material, e.g. steel or aluminum. Compared to single-material Automotive bodies, multi-material Automotive bodies allow optimal material selection in each structural component for higher product performance and lower cost. This paper presents novel material performance indices and procedures developed to guide systematic material selection for multi-material Automotive bodies. These new indices enable to characterize the crashworthiness performance of complex-shaped thin-walled beams in multi-material Automotive bodies according to material types. This paper also illustrates the application of these performance indices and procedures by designing a lightweight multi-material Automotive Body. These procedures will help to design a lightweight and affordable Body favored by the Automotive industry, thus to reduce fuel consumption and greenhouse gas emissions.
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a method for optimal design of Automotive Body assembly using multi material construction
Materials & Design, 2008Co-Authors: Xintao Cui, Shuxin WangAbstract:This paper proposes a new method for designing lightweight Automotive Body assemblies using multi-material construction with low cost penalty. Current constructions of Automotive structures are based on single types of materials, e.g., steel or aluminium. The principle of the multi-material construction concept is that proper materials are selected for their intended functions. The design problem is formulated as a multi-objective nonlinear mathematical programming problem involving both discrete and continuous variables. The discrete variables are the material types and continuous variables are the thicknesses of the panels. This problem is then solved using a multi-objective genetic algorithm. An artificial neural network is employed to approximate the constraint functions and reduce the number of finite element runs. The proposed method is illustrated through a case study of lightweight design of an Automotive door assembly.
Serkan Toros - One of the best experts on this subject based on the ideXlab platform.
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influence of aging treatment on mechanical properties of 6061 aluminum alloy
Materials & Design, 2010Co-Authors: Fahrettin Ozturk, Serkan Toros, A Sisman, Suleyman Kilic, R C PicuAbstract:Abstract Aluminum–magnesium–silicon (Al–Mg–Si) alloys show medium strength, excellent formability, good corrosion resistance and are widely used in extruded products and Automotive Body panels. The major advantage of these alloys is their age hardening response during the paint baking process as well as the fact that they exhibit no yield point phenomenon and Ludering. In this study, the mechanical properties of a commercially available AA6061 alloy aged to various levels were studied. Peak-aged conditions were reached in this particular alloy after a 2 h heat treatment at 200 °C. The variation of the yield stress, ultimate tensile strength, ductility and strain hardening rate with aging time is measured and discussed in relation to the microstructural changes induced by the heat treatment.
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review of warm forming of aluminum magnesium alloys
Journal of Materials Processing Technology, 2008Co-Authors: Serkan Toros, Fahrettin Ozturk, Ilyas KacarAbstract:Abstract Aluminum–magnesium (Al–Mg) alloys (5000 series) are desirable for the Automotive industry due to their excellent high-strength to weight ratio, corrosion resistance, and weldability. However, the formability and the surface quality of the final product of these alloys are not good if processing is performed at room temperature. Numerous studies have been conducted on these alloys to make their use possible as Automotive Body materials. Recent results show that the formability of these alloys is increased at temperature range from 200 to 300 °C and better surface quality of the final product has been achieved. The purpose of this paper is to review and discuss recent developments on warm forming of Al–Mg alloys.
