基于小冲孔试验的2205双相不锈钢焊接接头的应力腐蚀开裂行为
Stress Corrosion Cracking Behavior of 2205 Duplex Stainless Steel Welded Joint Based on Small Punch Test
摘 要
在含有H+的混合海水溶液中采用小冲孔应力腐蚀试验方法对2205双相不锈钢焊接接头不同区域的应力腐蚀开裂敏感性进行了研究。基于小冲孔试验的载荷-位移曲线建立了应力腐蚀开裂敏感性系数计算方法,并依托小冲孔试样毫微取样的优势对比了母材区、热影响区和焊缝区应力腐蚀敏感性的差异。从宏观断口与微观断口两方面分析了断裂机理。结果表明:焊缝区的应力腐蚀开裂敏感性均高于母材区和热影响区,焊缝区在海洋环境中更易发生应力腐蚀开裂。小冲孔应力腐蚀试验方法是一种评价焊接接头不同区域应力腐蚀开裂现象的有效方法。
2205双相不锈钢
焊接接头
小冲孔应力腐蚀试验
stress corrosion cracking
2205 duplex stainless steel
welded joint
small punch stress corrosion test
Abstract
Stress corrosion cracking (SCC) sensitivity of different regions of 2205 duplex stainless steel welded joint in seawater solution with different H+ concentrations was studied by small punch stress corrosion test. A calculation method of SCC sensitivity coefficient was established based on the load-displacement curves from small punch test. And the difference of SCC sensitivity in base metal zone, heat affected zone and weld zone was compared based on the advantage of small punch micro sample. The fracture mechanism was analyzed from both macroscopic and microscopic fracture. The results showed that the SCC sensitivity of weld zone was higher than that of base metal zone and heat affected zone, so the heat affected zone was prone to SCC in marine environment. Small punch stress corrosion test method is an effective method to evaluate stress corrosion cracking of different zones of welded joints.
中图分类号 TG174 DOI 10.11973/fsyfh-202311003
所属栏目 试验研究
基金项目 国家自然科学基金项目(52075050);江苏省自然科学基金项目(BK20201448);江苏省研究生实践创新计划项目(SJCX20-1003)
收稿日期 2021/11/23
修改稿日期
网络出版日期
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引用该论文: ZHANG Hao,WEI Lei,TAO Ping,PENG Jian. Stress Corrosion Cracking Behavior of 2205 Duplex Stainless Steel Welded Joint Based on Small Punch Test[J]. Corrosion & Protection, 2023, 44(11): 12
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参考文献
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【5】宋积文, 王毛毛,张亮,等.2205双相不锈钢在南海深水环境中的腐蚀行为[J].腐蚀与防护,2019,40(12):898-901,915.
【6】张文毓, 侯世忠.国内外双相不锈钢的应用进展[J].装备机械,2015(3):62-66.
【7】骆科彤, 宁斌,崔雪鸿.2205双相不锈钢焊接力学性能和腐蚀性能研究[J].广西民族大学学报(自然科学版),2020,26(1):92-98.
【8】江宽, 周友龙, 李厚一, 等. 12Cr1MoV焊接接头在碱性溶液中的应力腐蚀开裂行为[J]. 表面技术. 2022:131-139.
【9】YU H S,NA E G,CHUNG S H.Assessment of stress corrosion cracking susceptibility by a small punch test[J].Fatigue and Fracture of Engineering Materials and Structures,1999,22(10):889-896.
【10】BAI T,CHEN P,GUAN K S.Evaluation of stress corrosion cracking susceptibility of stainless steel 304L with surface nanocrystallization by small punch test[J].Materials Science and Engineering:A,2013,561:498-506.
【11】白涛, 关凯书,陈鹏.用小冲杆试验法评估304L不锈钢的应力腐蚀敏感性[J].机械工程材料,2013,37(1):36-39,42.
【12】MISAWA T,HAMAGUCHI Y,SAITO M.Stress corrosion cracking and hydrogen embrittlement studies of austenitic and ferritic steels by small punch test[J].Journal of Nuclear Materials,1988,155/156/157:749-753.
【13】MISAWA T,OHTSUKA T,SEO M,et al.Comparison of stress corrosion cracking susceptibility of austenitic and ferritic stainless steels in small punch testing[J].Journal of Nuclear Materials,1991,179/180/181:611-614.
【14】黄毓晖, 轩福贞,涂善东.304奥氏体不锈钢在酸性氯离子溶液中应力腐蚀性能的研究[J].压力容器,2009,26(7):5-10.
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