In-depth understanding in the effect of hydrogen on microstructural evolution, mechanical properties and fracture micro-mechanisms of advanced high-strength steels welded joints

被引：30

作者：

Xue, Junliang ^{[1
]}

Guo, Wei ^{[1
,2
]}

Xia, Mingsheng ^{[3
]}

Zhang, Yongxin ^{[1
]}

Tan, Caiwang ^{[4
]}

Shi, Jiaxin ^{[1
]}

Li, Xiang ^{[5
]}

Zhu, Ying ^{[1
]}

Zhang, Hongqiang ^{[1
,2
]}

机构：

[1] Beihang Univ, Sch Mech Engn & Automat, Beijing 100191, Peoples R China

[2] Beihang Univ, Jiangxi Res Inst, Nanchang 330096, Peoples R China

[3] TANGSTEEL Co, R&D Ctr, HBIS Grp, Tangshan 063016, Peoples R China

[4] Harbin Inst Technol Weihai, Shandong Prov Key Lab Special Welding Technol, Weihai 264209, Peoples R China

[5] Tsinghua Univ, Beijing Electron Microscope Ctr, Beijing 100084, Peoples R China

来源：

CORROSION SCIENCE | 2024年 / 233卷

关键词：

QP980 laser welded joint; Hydrogen embrittlement; Transgranular propagation; Intergranular propagation; ENHANCED LOCALIZED PLASTICITY; INDUCED CRACKING; EMBRITTLEMENT SUSCEPTIBILITY; FAILURE; MORPHOLOGY; AUSTENITE;

D O I：

10.1016/j.corsci.2024.112112

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The hydrogen embrittlement (HE) mechanism of QP980 steels laser welded joints with complex microstructures is unclear. The joint with hydrogen pre-charging fractured at the inter-critical heat affected zone (ICHAZ) in slow strain rate tensile test, and the relative loss of elongation amounted to 84.8 %. Hydrogen-induced microcracks mainly initiated inside martensite (similar to 60 %). Hydrogen-induced crack propagation paths of the joint were transgranular propagation of martensite and intergranular propagation of ferrite/martensite interface. The HE mechanism of the joint was the combination of the effects in hydrogen-enhanced localized plasticity (HELP) and hydrogen-enhanced decohesion (HEDE).

引用

页数：14

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