Effect of ball-burnishing on hydrogen-assisted cracking of a martensitic stainless steel

被引：4
|
作者：
Dreano, A. [1 ]
Alnajjar, M. [1 ]
Salvatore, F. [2 ]
Rech, J. [2 ]
Bosch, C. [1 ]
Wolski, K. [1 ]
Kermouche, G. [1 ]
Christien, F.
机构：
[1] Univ Lyon, Mines St Etienne, CNRS, UMR LGF 5307, F-42023 St Etienne, France
[2] Univ Lyon, Ecole Cent Lyon ENISE, CNRS, UMR5513 LTD, 58 Rue Jean Parot, F-42000 St Etienne, France
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2022年 / 47卷 / 93期
关键词：
Hydrogen embrittlement; Ball-burnishing; Maraging stainless steel; Residual stress; Sub-critical cracking; NUMERICAL-ANALYSIS; RESIDUAL-STRESSES; EMBRITTLEMENT; RESISTANCE; SUSCEPTIBILITY; TRANSPORT; STRENGTH;
D O I：
10.1016/j.ijhydene.2022.09.110
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：
Slow strain rate tensile tests under hydrogen cathodic charging are conducted on 17-4 PH steel with two surface conditions: mirror polished , ball-burnished. In both cases, sig-nificant subcritical cracking initiating at the surface is observed leading to considerable reduction in elongation to fracture. However, ball-burnished specimens show better elongation and much less secondary cracking than the polished ones. Ball-burnishing in-troduces high compressive residual stresses in the specimen sub-surface. However, EBSD showed a very limited impact of ball-burnishing on the microstructure, so little effect on hydrogen trapping is expected. The beneficial effect of ball-burnishing on the resistance of the hydrogen assisted cracking is mainly explained by the high compressive longitudinal stress at the specimen surface, which makes crack initiation more difficult and hence delays specimen failure. In addition, it is estimated that the amount of hydrogen intro-duced at the specimen surface is decreased by approximately 30% due to the high compressive hydrostatic stress.(c) 2022 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：39654 / 39665
页数：12
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