超级奥氏体不锈钢AL-6XN在超临界水环境中的应力腐蚀性能
SCC Behavior of Austenitic Stainless Steel AL-6XN in SCW Environment
摘 要
研究了超级奥氏体不锈钢AL-6XN在550 ℃/25 MPa和650 ℃/25 MPa超临界水环境中的应力腐蚀开裂敏感性, 同时还研究了辐照对其在550 ℃/25 MPa的超临界水环境中应力腐蚀开裂敏感性的影响。通过慢应变拉伸试验得到相应的应力-应变曲线, 通过扫描电镜(SEM)得到试样断口和侧面的形貌。结果表明, 在550 ℃/25 MPa的工况下, AL-6XN辐照前后的屈服强度、抗拉强度和延伸率并没有发生明显变化, 应力腐蚀开裂倾向均较小。当温度升高到650 ℃时, AL-6XN的应力腐蚀敏感性明显增加, 具有较大的应力腐蚀开裂倾向。本研究还发现未辐照过的AL-6XN在550 ℃/25 MPa的工况下发生了动态应变时效现象。
超级奥氏体不锈钢
慢应变速率拉伸
辐照
应力腐蚀开裂
supercritical water
superaustenitic stainless steel
SSRT
irradiation
SCC
Abstract
Stress corrosion cracking (SCC) susceptibilities of superaustenitic stainless steel AL-6XN in supercritical water (SCW) at 550 ℃/25 MPa and 650 ℃/25 MPa were evaluated, and the effects of irradiation on its susceptibility to SCC in SCW at 550 ℃/25 MPa was also evaluated. Slow strain rate tests (SSRT) were used to obtain the stress-strain curves and scanning electron microscopy (SEM) was used to observe the fracture surfaces. The results show that the mechanical strength and elongation of AL-6XN have no obvious change after being irradiated, and the susceptibility to SCC was low. The susceptibility to SCC increased obviously when the temperature was up to 650 ℃, which means the susceptibility of AL-6XN is high. It was also observed that AL-6XN showed dynamic strain aging (DSA) phenomenon in SCW at 550 ℃/25 MPa.
中图分类号 TG172.9
所属栏目 试验研究
基金项目 国家“973”重点基础研究发展计划(2007CB209802)
收稿日期 2013/6/21
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备注张乐福(1967-), 副教授, 博士, 从事核电材料相关研究,
引用该论文: SHEN Zhao,PAN Xiang-feng,ZHANG Le-fu,LI Li,TANG Rui. SCC Behavior of Austenitic Stainless Steel AL-6XN in SCW Environment[J]. Corrosion & Protection, 2014, 35(4): 340
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参考文献
【1】KRITZER P. Corrosion in high temperature and supercritical water and aqueous solutions:A review[J]. Journal of Supercritical Fluids, 2004, 29:1-29.
【2】SRIDHARANK, ZILLMERA, LICHT J R, et al. Corrosion behavior of candidate alloys for supercritical water reactors[C]//Proc ICAPP′04 Pittsburgh P A, USA:[s.n.], 2004:4136.
【3】李光辉, 彭君, 袁义帆, 等. 硫酸根离子和电极电位对异材焊接件A508/52M在高温水中应力腐蚀破裂的影响[J]. 理化检验-物理分册, 2013, 49(6):357-361.
【4】孟丽君, 庞淦文, 邢辉, 等. AL-6XN超级奥氏体钢高温拉伸时的动态应变时效[J]. 材料热处理学报, 2010, 31(4):50-54.
【5】KATADA Y, NAGATA N. The effect of temperature on fatigue crack growth behavior of a low-alloy pressure vessel steel in a simulated BWR environment[J]. Corrosion Science, 1985, 25(8/9):693-704.
【6】ATKINSON J D, YU J. Role of dynamic strain ageing in the environment assisted cracking observed in pressure vessel steels[J]. Fatigue Fract Eng Mater Struct, 1997, 20(1):1-12.
【7】钱匡武, 彭开萍, 陈文哲, 等. 金属动态应变时效现象中的“锯齿屈服”[J]. 福建工程学院学报, 2003, 1(1):4-8.
【2】SRIDHARANK, ZILLMERA, LICHT J R, et al. Corrosion behavior of candidate alloys for supercritical water reactors[C]//Proc ICAPP′04 Pittsburgh P A, USA:[s.n.], 2004:4136.
【3】李光辉, 彭君, 袁义帆, 等. 硫酸根离子和电极电位对异材焊接件A508/52M在高温水中应力腐蚀破裂的影响[J]. 理化检验-物理分册, 2013, 49(6):357-361.
【4】孟丽君, 庞淦文, 邢辉, 等. AL-6XN超级奥氏体钢高温拉伸时的动态应变时效[J]. 材料热处理学报, 2010, 31(4):50-54.
【5】KATADA Y, NAGATA N. The effect of temperature on fatigue crack growth behavior of a low-alloy pressure vessel steel in a simulated BWR environment[J]. Corrosion Science, 1985, 25(8/9):693-704.
【6】ATKINSON J D, YU J. Role of dynamic strain ageing in the environment assisted cracking observed in pressure vessel steels[J]. Fatigue Fract Eng Mater Struct, 1997, 20(1):1-12.
【7】钱匡武, 彭开萍, 陈文哲, 等. 金属动态应变时效现象中的“锯齿屈服”[J]. 福建工程学院学报, 2003, 1(1):4-8.
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