Microstructure and corrosion behavior of the heat affected zone of a stainless steel 308L-316L weld joint
来源期刊:JOURNAL OF MATERIALS SCIENCE TECHNOLOG2018年第10期
论文作者:Cheng Ma Qunjia Peng Jinna Mei En-Hou Han Wei Ke
文章页码:1823 - 1834
摘 要:Microstructure of the heat affected zone(HAZ) of a 308 L-316 L stainless steel(SS) weld joint and its corrosion behavior in high temperature water were studied. Peak of the residual strain was observed to approach to the fusion boundary in the HAZ while the strain increased from the top to root areas of the HAZ. The root area of the HAZ shows a lower corrosion resistance in high temperature water than the top and middle areas of the HAZ. This is attributed to a higher level of residual strain in association with a higher density of tangled dislocations in the top area of the HAZ. The results suggest that the residual strain in the HAZ could also promote the SCC through its effect on corrosion, in addition to that on the local microstructure and mechanical property of the steel.
Cheng Ma1,2,Qunjia Peng1,Jinna Mei3,En-Hou Han1,Wei Ke1
1. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences2. University of Chinese Academy of Sciences3. Suzhou Nuclear Power Research Institute
摘 要:Microstructure of the heat affected zone(HAZ) of a 308 L-316 L stainless steel(SS) weld joint and its corrosion behavior in high temperature water were studied. Peak of the residual strain was observed to approach to the fusion boundary in the HAZ while the strain increased from the top to root areas of the HAZ. The root area of the HAZ shows a lower corrosion resistance in high temperature water than the top and middle areas of the HAZ. This is attributed to a higher level of residual strain in association with a higher density of tangled dislocations in the top area of the HAZ. The results suggest that the residual strain in the HAZ could also promote the SCC through its effect on corrosion, in addition to that on the local microstructure and mechanical property of the steel.
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