夏卿坤,刘志义,林亮华,刘煜,许晓嫦,陈旭

• 1:长沙大学机电工程系
• 2:中南大学材料工程学院

摘要(Abstract)：

采用剥落腐蚀实验、电化学阻抗测试、透射显微技术等方法,研究了不同冷轧变形量对Al-Zn-Mg-Cu合金组织和剥落腐蚀性能的影响。结果表明:随着冷轧变形量的增加,合金在EXCO溶液中剥落腐蚀增大。变形量主要通过改变晶粒形态及晶界析出相影响合金的剥落腐蚀性能。一方面冷变形导致合金晶粒纵横比增大,使得腐蚀裂纹尖端处产生的楔入应力增加,裂纹扩展速率提高;另一方面,较大冷变形合金时效时形成的连续晶界析出相易成为阳极腐蚀通道,也会加速剥落腐蚀进程。

关键词(KeyWords)： Al-Zn-Mg-Cu合金;冷轧变形;剥落腐蚀

Abstract:

Keywords:

基金项目(Foundation): 国家“973”重点基础研究发展项目(2005CB623705-04)

作者(Author): 夏卿坤,刘志义,林亮华,刘煜,许晓嫦,陈旭

DOI: 10.13289/j.issn.1009-6264.2012.s2.013

参考文献(References)：

• [1]王洪斌,黄进峰,杨滨,等.Al-Zn-Mg-Cu系超高强度铝合金的研究现状与发展趋势[J].材料导报,2003,17(9):1-4.WANG Hong-bin,HUANG Jin-feng,YANG Bin,et al.Currentstatus and future directions of ultrahigh strength Al-Zn-Mg-Cu aluminum alloys[J].Material Science Guider,2003,17(9):1-4.
• [2]何建平,陈文理,许玮,等.恒温剥蚀对LC4CS铝合金结构和力学性能的影响[J].南京航空航天大学学报,1999,31(5):575-579.HE Jian-ping,CHEN Wen-li,XU Wei,et al.Effect of exfoliation on structure and tensile strength ofLC4CS aluminum alloy at constant temperature[J].Journal of Nanjing University of Aeronautics and Astronautics,1999,31(5):575-579.
• [3]潘清林,李运春,梁文杰,等.预变形对新型含钪Al-Cu-Li-Zr合金剥蚀性能的影响[J].中南大学学报:自然科学版,2008,39(4):735-740.PAN Qing-lin,LI Yun-chun,LIANG Wen-jie,et al.Influence of pre-deformation on exfoliation corrosion behavior of Al-Cu-Li-Zr alloy containing Sc[J].Journal of Central South University:Science and Technology,2008,39(4):726-740.
• [4]McNaughtan D,Worsfold M,Robsion M J.Corrosion product force measurements in the study of exfoliation and stress corrosion cracking in highstrength aluminum alloys[J].Corrosion Science,2003,45:2377-2389.
• [5]Robinson M J.Mathematical modeling of exfoliation corrosion in high strength aluminum alloys[J].Corrosion Science,1982,22:775-790.
• [6]王祝堂,田荣璋.铝合金及其加工手册[M].长沙:中南大学出版社,2000:132.
• [7]Wang D,Ni D R,Ma Z Y.Effect of pre-strain and two-step aging on microstructure and stress corrosion cracking of 7050 alloy[J].Materials Scienceand Engineering A,2008,494:360-366.
• [8]Talianker M,Cina B.Retrogression and re-aging and the role of dislocations in the stress corrosion of 7000-type aluminum alloys[J].MetallurgicalTransactions A,1989,20:2087-2092.
• [9]Chen K H,Fang H C.Effect of Yb,Cr and Zr additions on re-crystallization and corrosion resistance of Al-Zn-Mg-Cu alloys[J].Materials Science andEngineering A,2008,497(1-2):426-431.
• [10]Wang D,Ma Z Y.Effect of pre-strain on microstructure and stress corrosion cracking of over-aged 7050 aluminum alloy[J].Journal of Alloys andCompounds.2009,469.
• [11]李红英,曾再得,王娄翔,等.时效状态对新型Al-Cu-Li系合金剥落腐蚀性能的影响[J].材料热处理学报,2007,28(6):134-138.LI Hong-ying,ZENG Zai-de,WANG Lou-xiang,et al.Study on exfoliation corrosion of T6 aged and T8 aged of a new type Al-Cu-Li alloy[J].Transactions of Materials and Heat Treatment,2007,28(6):134-138.
• [12]张新明,宋丰轩,刘胜胆,等.双级时效对7050铝合金板材剥蚀性能的影响[J].中南大学学报:自然科学版,2011,42(8):2252-2259.ZHANG Xin-ming,SONG Feng-xuan,LIU Sheng-dan,et al.Influence of two-step aging on exfoliation corrosion properties of 7050 aluminum alloyplate[J].Journal of Central South University:Science and Technology,2011,42(8):2252-2259.

文章评论(Comment)：