钛合金压印接头疲劳性能与微观分析

doi:10.11896/j.issn.1005-023X.2017.06.017

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Abstract Mechanical clinching is a widely used connection technology in different industrial fields. Because it has several advantages such as simple operating process, high efficiency and so forth. Fatigue damage is a main failure mode of the metal mechanical part. In this paper, tensile-shear tests and fatigue test were carried out to characterize the mechanical properties of the clinched joints of titanium alloy. The tensile-shear strength of the clinched joint of titanium alloy was about 36.7% of that of the material itself with equal size. The fatigue strength for titanium alloy sheets joined by clinching was about 46% of that of titanium alloy and about the average load was about 42% of the static strength of clinched joints. Microscopic characteristics showed that the fracture was brittle fatigue fracture. Fatigue abrasive dust with high hardness was produced due to the fretting wear and oxidation which acted as micro abrasive in the process of fretting wear. In this way, it accelerated the abrasion and crack propagation and eventually leaded to fatigue failure.

Key words： titanium alloy mechanical clinching fatigue property fretting wear

Published: 02 May 2018

CLC number:

TG3

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	Articles by authors
	ZHANG Yue
	HE Xiaocong
	ZHANG Long
	ZHANG Xianlian

Cite this article:

ZHANG Yue,HE Xiaocong,ZHANG Long, et al. Fatigue Property and Microanalysis of Clinched Joints of Titanium Alloy[J]. Materials Reports, 2017, 31(6): 81-85.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.06.017 OR http://www.mater-rep.com/EN/Y2017/V31/I6/81

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