SUS304不锈钢点焊与胶焊接头的疲劳强度分析<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.016.023

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Abstract Tensile shear test of spot welds and weld-bonded joints of 1.5 mm SUS304 austenitic stainless steel was made to acquire their tensile strength. Fatigue test of spot welds and weld-bonded joints was carried out under different levels of stresses, and two kinds of joint′s load-life curves were obtained. Scanning electron microscopy was used to explore the fatigue failure mechanism. Results showed that the relatively good parameters for weld-bonded joints were welding current 10.0 kA, welding time 80 ms, and welding pressure 0.5 MPa. Under this welding parameters, the tensile strength of spot welds, uncured weld-bonded and cured weld-bonded joints were 12 825.5 N, 10 345.6 N and 10 022.9 N, respectively. Weld-bonded joints had a higher fatigue strength than spot welds. Fatigue failure modes of spot welds and weld-bonded joints were mainly composed of eyebrow failure and interfacial fracture mode. In the process of fatigue failure of weld-bonded joints, the rubber failure occurred first, then fatigue crack initiated from the heat affected zone edge between the inner surface and extended in the direction of thickness and width.

Key words： SUS304 stainless steel spot welds weld-bonded joint fatigue life failure mode

Published: 07 May 2018

CLC number:

TG115.28

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	Articles by authors
	XIAO Zhijie
	ZENG Kai
	HE Xiaocong
	XING Baoying
	ZHANG Long
	SUN Xinyu

Cite this article:

XIAO Zhijie,ZENG Kai,HE Xiaocong, et al. Fatigue Strength Analysis of Spot Weld and Weld-bonded Joint for SUS304 Stainless Steel[J]. Materials Reports, 2017, 31(16): 112-116.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.016.023 OR http://www.mater-rep.com/EN/Y2017/V31/I16/112

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