材料科学
断口学
极限抗拉强度
复合材料
接头(建筑物)
焊接
抗剪强度(土壤)
断裂(地质)
铝
多孔性
冶金
结构工程
环境科学
土壤水分
土壤科学
工程类
作者
Yong Kim,Cheolhee Kim,Boyoung Lee
出处
期刊:Journal of welding and joining (Online)
[The Korean Welding and Joining Society]
日期:2018-08-22
卷期号:36 (4): 23-35
被引量:4
标识
DOI:10.5781/jwj.2018.36.4.3
摘要
In order to commercialize the steel to aluminum joining technology using arc heat source in the automobile industry, it is the most important to secure a reliable joining strength. However, there is not enough to describe the overall static strength characteristics of dissimilar metal joints. Therefore, in this study, the tensile-shear test was performed according to the process parameters which affect the strength of the lap joint structure. As a result, the porosity of the Al-Fe dissimilar joint has a greater influence on the strength due to the vaporization of Zn present in the root zone than the geometrical shape of the bonded length or the wetting angle. In addition, it was confirmed that the crack was initiated due to the root pore, along with cracks in the vicinity of the continuous pore by fractography analysis. Decrease of the tensile strength is due to the reduction of the absolute cross-sectional area result from the pores present in the weld metal. Finally, from the results of stress analysis using FEM, it was confirmed that the pore of the root zone due to the increase of the heat input had a greater influence on the strength even though the interface bonding length was increased. Key words: Dissimilar metal joining, Tensile-shear strength, Zn pore, Fractography, Root zone
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