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Effect of Microstructure and Texture on Mechanical Properties of Resistance Spot Welded High Strength Steel 22MnB5 and 5A06 Aluminium Alloy

Engineering Research Centre of Advanced Manufacturing Technology for Automotive Structural Parts, Ministry of Education, Beijing University of Technology, Beijing 100124, China
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Metals 2019, 9(6), 685; https://doi.org/10.3390/met9060685
Received: 20 May 2019 / Revised: 11 June 2019 / Accepted: 13 June 2019 / Published: 14 June 2019
The present study aims to investigate the effect of microstructure and texture on mechanical properties of resistance spot welding of high strength steel 22MnB5 and 5A06 aluminium alloy as a function of welding parameters. The pseudo-nugget zones (NZs) at the steel side have undergone full recrystallisation with a fine-grained ferrite structure containing a small amount of retained austenite and a high hardness of approximately 500 HV, which is a 35% increase in hardness compared to the base material (BM) with fine lath martensitic structure. The NZs at the Al side contain both a recrystallisation texture and shear texture. Higher tensile shear strength with increasing weld time could be linked to the random texture at the Al side. The highest tensile shear strength was achieved at an intermetallic layer thickness of 4 mm. View Full-Text
Keywords: resistance spot welding; recrystallisation; texture; properties resistance spot welding; recrystallisation; texture; properties
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Jiang, X.; Chen, S.; Gong, J.; Lu, Z. Effect of Microstructure and Texture on Mechanical Properties of Resistance Spot Welded High Strength Steel 22MnB5 and 5A06 Aluminium Alloy. Metals 2019, 9, 685.

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