加工硬化对304不锈钢应力腐蚀裂纹裂尖力学性能的影响

doi:10.11896/cldb.19010071

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Abstract Stress corrosion cracking (SCC) is one of the main failure mode of austenitic steel in pressure piping, and cold working deformation has a certain influence on the material mechanical properties and the crack propagation. Firstly, the constitutive parameters of 304 stainless steel under different cold working hardening conditions were obtained by fatigue stretching machine, and then finite element simulation method was adopted to establish the SCC crack tip analysis model and sub-model in this paper. The SCC crack tip stress strain, J-integration and crack growth rate of 304 austenitic stainless steel were studied under different work hardening. Results show that with the increasing of the material work har-dening degree, the Mises stress and J integral at the SCC tip increase gradually, but the crack tip strain (PEEQ) gradually decreases. To some extent, the work hardening promotes and accelerates the stress corrosion cracking of 304 stainless steel.

Key words： work hardening stress corrosion cracking crack tip stress strain

Published: 28 October 2019

CLC number:

TG174

Fund:This work was financially supported by the National Natural Science Foundation of China (51475362,11502195)

About author:: Jianlong Zhang, doctoral student, Xi’an University of Science and Technology, Shaanxi, engaged in safety evaluation of mechanical structures;He Xue, professor, doctoral supervisor, Xi’an University of Science and Technology, graduated from Xi’an Jiaotong University in November 1998, with a doctorate in engineering. He is mainly engaged in the safety assessment of important mechanical structures, the safety and reliability assessment and application research of key nuclear welding joints. More than 100 articles have been published in important journals at home and abroad, and more than 20 invention patents have been declared.

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	ZHANG Jianlong
	XUE He
	CUI Yinghao
	CHEN Hao

Cite this article:

ZHANG Jianlong,XUE He,CUI Yinghao, et al. Effect of Work Hardening on Mechanical Properties of Stress Corrosion Crack Tip of 304 Stainless Steel[J]. Materials Reports, 2019, 33(24): 4147-4151.

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http://www.mater-rep.com/EN/10.11896/cldb.19010071 OR http://www.mater-rep.com/EN/Y2019/V33/I24/4147

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