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
收藏
页码：210 / 221
页数：12
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