电阻点焊异种 TWIP1000/TRIP800 接头的机械和微结构表征

IF 2.4 4区材料科学 Q2 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Testing Pub Date : 2023-11-28 DOI:10.1515/mt-2023-0148

Fatih Özen

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引用次数: 0

摘要

摘要本研究从微观结构和机械性能方面考察了异种 TWIP1000/TRIP800 接头的电阻点焊性。在 6 kA 焊接电流下，焊接持续时间为 30 个周期，最大拉伸剪切承载力为 16,918 N。在拉伸剪切试验中获得了主要的拉拔破坏和界面破坏模式。虽然 TRIP 钢的热影响区完全转变为回火马氏体，但其分离性能优于 TWIP 钢。TWIP 钢的热影响区狭窄，二次相形成和晶粒突然粗化破坏了电阻点焊接头的最薄弱点。

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Mechanical and microstructural characterization of resistance spot welded dissimilar TWIP1000/TRIP800 joints

Abstract In this work, resistance spot weldability of dissimilar TWIP1000/TRIP800 joint was investigated in terms of microstructural and mechanical characterization. The maximum tensile-shear load bearing capacity was 16,918 N in 6 kA welding current with 30 cycles of welding duration. Pull-out failure which was dominant and interfacial failure modes were obtained in tensile-shear tests. Although heat affected zone of the TRIP steel was totally transformed into tempered martensite, it showed better separation performance than TWIP steel. Heat affected zone of the TWIP steel was narrow, secondary phase formations and sudden grain coarsening have compromised the weakest point in the resistance spot welded joint.

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来源期刊

Materials Testing 工程技术-材料科学：表征与测试

CiteScore

4.20

自引率

36.00%

发文量

165

审稿时长

4-8 weeks

期刊介绍： Materials Testing is a SCI-listed English language journal dealing with all aspects of material and component testing with a special focus on transfer between laboratory research into industrial application. The journal provides first-hand information on non-destructive, destructive, optical, physical and chemical test procedures. It contains exclusive articles which are peer-reviewed applying respectively high international quality criterions.