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interfacial characterization of resistance spot welded joint of steel and aluminum alloy

China Welding 2010年第4期19卷 6-10页

作者：张伟华孙大千殷世强韩立军邱小明陈庆雷 School of Materials Science and Engineering Jilin University Changehun 130022 Department of Product Management FAW-Volkswagen Automobile Co. Ltd. Changchun130011

The dissimilar material resistance spot welding of galvanized high strength steel and aluminum alloy had been conducted. The welded joint exhibited a thin reaction layer composed of Fe2Al5 and Fe4Al13 phases at steel/aluminum interface. The welded joint presented a tensile shear load of 3.3 kN with an aluminum alloy nugget diameter of 5.7 mm. The interfacial failure mode was observed for the tensile shear specimen and fracture occurred at reaction layer and aluminum alloy fusion zone beside the interface. The reaction layer with compounds was the main reason for reduction of the welded joint mechanical property.

关键词： high strength steel aluminum alloy resistance spot welded joint interfacial characterization

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Interface microstructure and mechanical properties of selective laser melted multilayer functionally graded materials

引用

Journal of Central South University 2021年第4期28卷 1155-1169页

作者： WANG Di DENG Guo-wei YANG Yong-qiang CHEN Jie WU Wei-hui WANG Hao-liang TAN Chao-lin School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou 510640China School of Intelligent Engineering Shaoguan UniversityShaoguan 512005China School of Mechanical Engineering Dongguan University of TechnologyDongguan 523830China

Functionally graded material(FGM)can tailor properties of components such as wear resistance,corrosion resistance,and functionality to enhance the overall *** selective laser melting(SLM)additive manufacturing highlights the capability in manufacturing FGMs with a high geometrical complexity and manufacture *** this work,the 316L/CuSn10/18Ni300/CoCr four-type materials FGMs were fabricated using *** microstructure and properties of the FGMs were investigated to reveal the effects of SLM processing parameters on the defects.A large number of microcracks were found at the 316L/CuSn10 interface,which initiated from the fusion boundary of 316L region and extended along the building *** elastic modulus and nano-hardness in the 18Ni300/CoCr fusion zone decreased significantly,less than those in the 18Ni300 region or the CoCr *** iron and copper elements were well diffused in the 316L/CuSn10 fusion zone,while elements in the CuSn10/18Ni300 and the 18Ni300/CoCr fusion zones showed significantly gradient *** with other regions,the width of the CuSn10/18Ni300 interface and the CuSn10 region expand *** mechanisms of materials fusion and crack generation at the 316L/CuSn10 interface were *** addition,FGM structures without macro-crack were built by only altering the deposition subsequence of 316L and CuSn10,which provides a guide for the additive manufacturing of FGM structures.

关键词： selective laser melting multilayer functionally graded material interfacial characterization crack defects mechanical properties

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