欢迎登录材料期刊网

材料期刊网

高级检索

采用阴极极化、慢应变速率拉伸试验(SSRT)和定氢仪研究阴极极化对7050铝合金应力腐蚀行为的影响.结果表明:当阴极极化电位高于-1100 mV时,7050铝合金的应力腐蚀敏感性(Iscc)随着极化电位的负移而升高;而当阴极极化电位低于-1100 mV时,Iscc则随着极化电位的负移而下降.外加极化电位对不同时效状态7050铝合金Iscc的影响程度不同,即阴极极化对欠时效状态下铝合金的Iscc影响显著,对过时效状态铝合金Iscc的影响最小,对峰时效状态下铝合金Iscc的影响居中.铝合金的应力腐蚀机理为阳极溶解和氢脆共同作用,且氢对铝合金应力腐蚀的作用随着氢浓度的增加而增加.

参考文献

[1] 韩念梅,张新明,刘胜胆,宋丰轩.预拉伸对7050铝合金断裂韧性的影响[J].中国有色金属学报,2010(11):2088-2093.
[2] 张宇,宋仁国,陈小明,任建平.7xxx系铝合金氢脆的研究现状及发展趋势[J].材料导报,2009(z1):453-456.
[3] CHEN Song-yi;CHEN Kang-hua;PENG Guo-sheng;LIANG Xin CHEN Xue-hai .Effect of quenching rate on microstructure and stress corrosion cracking of 7085 aluminum alloys[J].Transactions of Nonferrous Metals Society of China,2012,22(01):47-52.
[4] Jing-Chie Lin;Hsueh-Lung Liao;Wern-Dare Jehng;Chih-Horng Chang;Sheng-Long Lee .Effect of heat treatments on the tensile strength and SCC-resistance of AA7050 in an alkaline saline solution[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,2006(10):3139-3156.
[5] BIN-LUNG OU;JI-GANG YANG;MON-YU WEI .Effect of Homogenization and Aging Treatment on Mechanical Properties and Stress-Corrosion Cracking of 7050 Alloys[J].Metallurgical and Materials Transactions, A. Physical Metallurgy and Materials Science,2007(8):1760-1773.
[6] 董超芳,安英辉,李晓刚,生海,肖葵.7A04铝合金在海洋大气环境中初期腐蚀的电化学特性[J].中国有色金属学报,2009(02):346-352.
[7] 赵军军,张平,李奇,原津萍.外加电位条件下7A52铝合金应力腐蚀开裂敏感性研究[J].装甲兵工程学院学报,2011(05):84-87.
[8] BURLEIGH T D .The postulated mechanisms for stress corrosion cracking of aluminum alloy[J].CORROSION,1991,47:90-98.
[9] KAESCHE H.Metallic corrosion-principles of physical chemistry and current problems[M].Houston:National Association of Corrosion Engineers,1985:1-55.
[10] D. Wang;Z.Y. Ma .Effect of pre-strain on microstructure and stress corrosion cracking of over-aged 7050 aluminum alloy[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2009(1/2):445-450.
[11] SPROWLS D O;BROWN R H.Stress corrosion mechanisms for aluminum alloys[A].Houston:NACE,1969:466.
[12] SPEIDEL M O.Current understanding of stress corrosion cracking growth in aluminum alloys[A].Brussels:NATO,1971:289.
[13] GEST R J;TROIANO A R .Stress corrosion and hydrogen embrittlement in an aluminum alloy[J].CORROSION,1974,30(08):274-279.
[14] 肖纪美 .氢与材料[J].稀有金属,1985,4(02):2-18.
[15] 宋仁国.高强铝合金晶界偏析与氢致断裂机理的研究[J].航空材料学报,1997(01):31.
[16] 刘继华,李荻,朱国伟,刘培英.7075铝合金应力腐蚀敏感性的SSRT和电化学测试研究[J].腐蚀与防护,2005(01):6-9.
[17] LI Jing-feng;PENG Zuo-wei;LI Chao-xing;JIA Zhi-qiang CHEN Wen-jing ZHENG Zi-qiao .Mechanical properties,corrosion behaviors and microstructure of 7075 aluminum alloy with various aging statements[J].Transactions of Nonferrous Metals Society of China,2008,18:755-762.
[18] 刘军 .氢对7050铝合金短横方向慢应变速率拉伸及应力腐蚀开裂性能的影响[D].东北工学院,1989.
[19] NAJJAR D;MAGNIN T;WARNER T J .Influence of critical surface defects and localized competition between anodic dissolution and hydrogen effects during stress corrosion cracking of a 7050 aluminum alloy[J].Material Science and Engineering,1997,238:293-302.
上一张 下一张
上一张 下一张
计量
  • 下载量()
  • 访问量()
文章评分
  • 您的评分:
  • 1
    0%
  • 2
    0%
  • 3
    0%
  • 4
    0%
  • 5
    0%