Effect of low temperature on hydrogen-assisted crack propagation in 304L/308L austenitic stainless steel fusion welds

被引：23

作者：

Jackson, H. F. ^{[1
]}

San Marchi, C. ^{[1
]}

Balch, D. K. ^{[1
]}

Somerday, B. P. ^{[1
]}

机构：

[1] Sandia Natl Labs, Livermore, CA 94550 USA

来源：

CORROSION SCIENCE | 2013年 / 77卷

关键词：

Stainless steel; SEM; Hydrogen embrittlement; STACKING-FAULT ENERGY; LIQUID-METAL EMBRITTLEMENT; PLASTIC-DEFORMATION; GASEOUS-HYDROGEN; FRACTURE; MARTENSITE; TOUGHNESS; FAILURE; FERRITE; IRON;

D O I：

10.1016/j.corsci.2013.08.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effects of low temperature on hydrogen-assisted cracking in 304L/308L austenitic stainless steel welds were investigated using elastic-plastic fracture mechanics methods. Thermally precharged hydrogen (140 wppm) decreased fracture toughness and altered fracture mechanisms at 293 and 223 K relative to hydrogen-free welds. At 293 K, hydrogen increased planar deformation in austenite, and microcracking of delta-ferrite governed crack paths. At 223 K, low temperature enabled hydrogen to exacerbate localized deformation, and microvoid formation, at austenite deformation band intersections near phase boundaries, dominated damage initiation; microcracking of ferrite did not contribute to crack growth. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：210 / 221

页数：12

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