Effect of laser surface hardening on the hydrogen embrittlement of AISI 420: Martensitic stainless steel

被引：20
作者：
Mahmoudi, B. [1 ]
Torkamany, M. J. [2 ]
Aghdam, A. R. Sabour [1 ]
Sabbaghzadeh, J. [2 ]
机构：
[1] Tarbiat Modares Univ, Dept Mat Engn, Tehran, Iran
[2] Iranian Natl Ctr Laser Sci & Technol, Tehran, Iran
来源：
MATERIALS & DESIGN | 2011年 / 32卷 / 05期
关键词：
Laser surface treatments; Corrosion; Ferrous metals and alloys; STRESS-CORROSION CRACKING; CAVITATION EROSION RESISTANCE; MATRIX COMPOSITES; THIOSULFATE; CLAD; NACL;
D O I：
10.1016/j.matdes.2011.01.028
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The susceptibility of stress corrosion cracking (SCC) of AISI 420 which was surface transformed hardened by a pulsed Nd:YAG laser, was investigated in 5% sodium chloride + 0.5% acetic acid solution by the U-Bend method, in the range of pH value from 3.5 to 6, in the absence and presence of 1 ppm thiosulphate ion, at 25 and 60 degrees C. The results showed that the laser-treated areas are more susceptible to SCC than the base metal. Hydrogen embrittlement (HE) is the main cause of crack propagating, mostly effective on the grain boundaries and the interface between carbide particles and second phases; tempered martensite or ferrite. (C) 2011 Elsevier Ltd All rights reserved.
引用
收藏
页码：2621 / 2627
页数：7
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