Effect of creep stress level on hydrogen embrittlement mechanism of Al-Zn-Mg-Cu alloy

doi:10.1016/j.msea.2024.147542

IMR OpenIR

	Effect of creep stress level on hydrogen embrittlement mechanism of Al-Zn-Mg-Cu alloy
	Jiang, Zhenru 1; Li, He 1,5; Yu, Feng 2; Ma, Kai 3; Shu, Xuedao 1,5; Li, Shuhui 4; Yang, Zixuan 1; Xiao, Bolv 3
通讯作者	Li, He(lihe@nbu.edu.cn) ; Xiao, Bolv(blxiao@imr.ac.cn)
	2025
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	920 页码:18
摘要	In this work, the mechanical properties and microstructural evolution of creep-aged Al-Zn-Mg-Cu alloy have been experimentally investigated before and after hydrogen charging under various creep stress levels. It was found that the elongation and resistance to hydrogen embrittlement of the alloy were significantly influenced by the creep stress levels, and the transition from hydrogen-induced debonding (HEDE) under low stress levels (0 MPa and 180 MPa) to hydrogen-enhanced localized plasticity (HELP) under high stress levels (270 MPa and 360 MPa) was observed. Compared to the non-hydrogen-charged samples, the ultimate tensile strength (UTS) was decreased by 15 MPa, the elongation decreased by 3.2 % and the hydrogen embrittlement susceptibility was 21.92 % under 0 MPa creep stress; while under 360 MPa creep stress, UTS increased by 5 MPa, the elongation decreased by 0.5 % and the hydrogen embrittlement susceptibility was 4.17 %. Microstructural observations confirmed that with the increase of creep stress level, the dislocation density gradually increases (from 0.72 x 1014 m-2 under 0 MPa to 1.44 x 1014 m-2 under 360 MPa), promoting the growth and coarsening of precipitates, which led to the discontinuity of grain boundary precipitates (GBPs) and the widening of precipitation free zone (PFZ) (from 14.39 nm under 0 MPa to 39.82 nm under 360 MPa). Enhanced diffusion of solute atoms such as Cu and Zr was also observed, contributing to improve resistance to hydrogen embrittlement and localize plastic deformation in the alloy. The study concludes that higher stress creep aging treatment is an effective process to reduce the hydrogen embrittlement susceptibility of the Al-Zn-Mg-Cu alloy.
关键词	Al-Zn-Mg-Cu alloy Hydrogen Non-isotherm creep aging Stress level Microstructure
资助者	Key Laboratory of Impact and Safety Engineering, Ministry of Education and Part Rolling Key Laboratory of Zhejiang, Ningbo University, Ningbo, China ; National Natural Science Foundation of China ; Ningbo Science and Technology Plan ; Natural Science Foundation of Ningbo ; Guangxi Key Research and Development Plan ; Nanning Science and Technology Planning Project
DOI	10.1016/j.msea.2024.147542
收录类别	SCI
语种	英语
资助项目	Key Laboratory of Impact and Safety Engineering, Ministry of Education and Part Rolling Key Laboratory of Zhejiang, Ningbo University, Ningbo, China ; National Natural Science Foundation of China[52205386] ; National Natural Science Foundation of China[52075272] ; Ningbo Science and Technology Plan[2021Z099] ; Ningbo Science and Technology Plan[2023Z037] ; Natural Science Foundation of Ningbo[2023J079] ; Guangxi Key Research and Development Plan[AA22068075] ; Guangxi Key Research and Development Plan[AA23023031] ; Nanning Science and Technology Planning Project[20221233]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001362010800001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/191788
专题	中国科学院金属研究所
通讯作者	Li, He; Xiao, Bolv
作者单位	1.Ningbo Univ, Sch Mech Engn & Mech, Ningbo 315211, Peoples R China 2.Ningbo Univ Technol, Dept Mech Engn, Ningbo, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.Shanghai Jiao Tong Univ, State Key Lab Mech Syst & Vibrat, Shanghai 200240, Peoples R China 5.Ningbo Univ, Zhejiang Prov Key Lab Part Rolling Technol, Ningbo 315211, Peoples R China
推荐引用方式 GB/T 7714	Jiang, Zhenru,Li, He,Yu, Feng,et al. Effect of creep stress level on hydrogen embrittlement mechanism of Al-Zn-Mg-Cu alloy[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2025,920:18.
APA	Jiang, Zhenru.,Li, He.,Yu, Feng.,Ma, Kai.,Shu, Xuedao.,...&Xiao, Bolv.(2025).Effect of creep stress level on hydrogen embrittlement mechanism of Al-Zn-Mg-Cu alloy.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,920,18.
MLA	Jiang, Zhenru,et al."Effect of creep stress level on hydrogen embrittlement mechanism of Al-Zn-Mg-Cu alloy".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 920(2025):18.