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Metals 2017, 7(1), 14; doi:10.3390/met7010014

Properties of Resistance Spot-Welded TWIP Steels

1
TUBITAK MAM, Gebze, Kocaeli 41470, Turkey
2
Department of Manufacturing Engineering, Karabuk University, Karabuk 78050, Turkey
*
Author to whom correspondence should be addressed.
Academic Editors: Halil Ibrahim Kurt, Adem Kurt and Necip Fazil Yilmaz
Received: 31 October 2016 / Revised: 15 December 2016 / Accepted: 16 December 2016 / Published: 11 January 2017
(This article belongs to the Special Issue Selected Papers from ICWET16)
View Full-Text   |   Download PDF [3217 KB, uploaded 11 January 2017]   |  

Abstract

High manganese TWIP (twinning-induced plasticity) steels are particularly attractive for automotive applications because of their exceptional properties of strength combined with an excellent ductility. However, the microstructure and properties of TWIP steels are affected by excessive thermal cycles, such as welding and heat treatment. This paper deals with characterization and understanding the effect of welding current and time on the mechanical properties and microstructure of the resistance spot welded TWIP steel. For this purpose, weld nugget diameter was evaluated and the hardness, tensile shear strength of the weldment, and failure mode of samples were also determined. It has been found that the tensile shear strength of the samples increased with increasing welding current and welding time without expulsion, which reduces the strength of the weldment. Tensile shear samples failed by a partial interfacial fracture mode for low-heat input welds. The pullout fractures were observed with a sufficient heat input without expulsion. View Full-Text
Keywords: TWIP steel; welding parameters; resistance spot weld; mechanical properties; microstructure TWIP steel; welding parameters; resistance spot weld; mechanical properties; microstructure
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Kazdal Zeytin, H.; Ertek Emre, H.; Kaçar, R. Properties of Resistance Spot-Welded TWIP Steels. Metals 2017, 7, 14.

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