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首页> 外文期刊>Indian Journal of Science and Technology >Mechanical Properties and Phase Transformations in Resistance Spot Welded Dissimilar Joints of AISI409M/AISI301 Steel
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Mechanical Properties and Phase Transformations in Resistance Spot Welded Dissimilar Joints of AISI409M/AISI301 Steel

机译：AISI409M / AISI301钢的电阻点焊异种接头的力学性能和相变

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Objectives: In this study, the mechanical properties and phase transformations of resistance spot welded dissimilar joints between austenitic stainless steel AISI 301 and ferity stainless steel AISI 409M are investigated. Methods/Analysis: Mechanical properties such as tensile shear strength, failure energy, failure mode, nugget size and surface indentation were analysed at varying current ratings. Macrostructure was examined for size and shape. Microstructure at various locations such as, fusion zone and heat affected zones were investigated. Micro hardness measurement was done at various locations along the weld. Findings: Tensile shear strength increases with increase in welding current in expulsion free welds. Fusion zone hardness was found to be larger than that of both base metals and heat affected zones. Nugget size and energy absorbing capacity of the spot weld were found to be in correlation with weld current in expulsion free samples. Electrode indentation on the nugget surface increases with increase in welding current. Fusion zone microstructure consists of martensite and ferrite. Asymmetrical nugget shape was observed. Novelty/Improvement: Investigating the effects of resistance spot welding on the mechanical properties and phase transformations of ferritic-austenitic dissimilar metal weld joint.
机译：目的：在本研究中，研究了奥氏体不锈钢AISI 301和高强度不锈钢AISI 409M之间的电阻点焊异种接头的力学性能和相变。方法/分析：在不同的额定电流下分析了力学性能，例如拉伸剪切强度，破坏能量，破坏模式，熔核尺寸和表面压痕。检查宏观结构的尺寸和形状。研究了熔合区和热影响区等不同位置的微观结构。在焊缝的各个位置进行了显微硬度测量。结果：无排焊焊缝中的拉伸剪切强度随焊接电流的增加而增加。发现熔合区硬度大于贱金属和热影响区的硬度。发现无排料样品中点焊的熔核大小和能量吸收能力与焊接电流相关。熔核表面上的电极压痕随着焊接电流的增加而增加。熔合区组织由马氏体和铁素体组成。观察到不对称的金块形状。新颖性/改进：研究电阻点焊对铁素体-奥氏体异种金属焊接接头的力学性能和相变的影响。

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