Crack growth rate in hydrogen pre-charged martensitic steels during slow strain rate tests

被引：4

作者：

Shi, Jie ^{[1
]}

Yu, Wenchao ^{[1
]}

Sun, Ting ^{[1
]}

Xu, Le ^{[1
]}

Li, Xiaoyuan ^{[1
]}

Wang, Maoqiu ^{[1
]}

机构：

[1] Cent Iron & Steel Res Inst, Inst Special Steel, Beijing 100081, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2023年 / 48卷 / 36期

关键词：

Martensitic steel; Slow strain rate test; Crack growth rate; Hydrogen pre-charging; Nano-sized precipitate; HIGH-STRENGTH STEEL; NOTCH TENSILE-STRENGTH; DIFFUSION; BEHAVIOR; FRACTURE;

D O I：

10.1016/j.ijhydene.2022.12.271

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Crack growth rate in two high strength martensitic steels with the Mo contents of 0.43 wt.% and 1.06 wt.% was investigated by means of slow strain rate tests (SSRT) on compact tensile specimens after hydrogen pre-charging. It was found that the crack growth rate increased and the values of stress intensity factors KIH and KImax decreased with the increase of precharged hydrogen concentration. The steel with higher Mo content showed much lower crack growth rate than the steel with lower Mo content. It could be attributed to more nano-sized precipitates that can act as the hydrogen trapping sites and mitigate hydrogen deleterious effects on crack growth rate and the KIH and KImax values. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：13699 / 13704

页数：6

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