陈小明,宋仁国,李红霞,任建平,张宇

• 1:浙江工业大学机械制造及自动化教育部重点实验室

摘要(Abstract)：

采用硬度测试、拉伸力学性能测试、XRD衍射物相分析以及α(A l)基体点阵常数的测量等方法对7075铝合金超长时间时效行为、力学性能、应力腐蚀(SCC)敏感性及组织进行了研究。结果表明,7075铝合金的硬度及强度都具有时效双峰特征。两个时效峰的硬度和强度相差不多,但对应第二峰时效的合金具有高强度低SCC敏感性等优异性能。第二峰强化相主要是充分析出的η′相(MgZn2)。

关键词(KeyWords)： 7075铝合金;“双峰”时效;组织;性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50771093)

作者(Author): 陈小明,宋仁国,李红霞,任建平,张宇

DOI: 10.13289/j.issn.1009-6264.2010.02.023

参考文献(References)：

• [1]戴晓元,夏长清,刘昌斌,等.固溶处理及时效对7xxx铝合金组织与性能的影响[J].材料热处理学报,2007,28(4):59-63.DAI Xiao-yuan,Xia CHANG-qing,LIUChang-bin,et al.Effects of solution treatment and aging process on microstructure and mechanical propertiesof 7xxx aluminum alloy[J].Transactions of Materials and Heat Treatment,2007,28(4):59-63.
• [2]潘复生,张丁非.铝合金及应用[M].北京:化学工业出版社,2006:59-118.
• [3]陈小明,宋仁国,李杰.7xxx铝合金的研究现状及发展趋势[J].材料导报,2009,23(2):67-70.CHEN Xiao-ming,SONG Ren-guo,LI Jie.Current research status and development trents of 7xxx series aluminum alloys[J].Materials Review,2009,23(2):67-70.
• [4]曾苏民.影响铝合金固溶保温时间的多因素相关规律[J].中国有色金属学报,1999,9(1):79-86.ZENG Su-min.Disciplines of multiple factors effecting solution treating of aluminum alloy[J].The Chinese Journal of Nonferrous Metals,1999,9(1):79-86.
• [5]黄振宝,张新明,刘胜胆,等.固溶处理对7A55铝合金的组织和力学性能的影响[J].材料热处理学报,2007,28(1):87-91.HUANG Zhen-bao,ZHANG Xin-ming,LIU Sheng-dan,et al.Effect of solution treatment on microstructure and mechanical properties of 7A55aluminum alloy[J].Trans Metal Heat Treatment,2007,28(1):87-91.
• [6]Tanner D A,Robinson J S.Residual stress magnitudes and related properties in quenched aluminum alloys[J].Mater Sci&Tech,2006,22(1):77-85.
• [7]阎大京.从7475铝合金的时效看Al-Zn-Mg-Cu系合金的强化[J].材料工程,1991(2):15-19.YAN Da-jing.Analysis about strengthening mechanism from the aging process of 7475 Al alloy[J].Journal of Materials Engineering,1991(2):15-19.
• [8]Song R G,Dietzel W,Zhang B J,et al.Stress corrosion cracking and hydrogen embrittlement of an Al-Zn-Mg-Cu alloy[J].Acta Materialia,2004,52(16):4727-4743.
• [9]Loffler H,Kovace I,Lendvai J.Decomposition processes in Al-Zn-Mg alloys[J].J Mater Sci,1992,27(7):4772.
• [10]Knano M,Araki I,Cui Q.Precipitation behavior of 7000 alloys during retrogression and reaging treatment[J].Mater Sci and Technol,1994,10(7):599.
• [11]科瓦索夫,弗里德良捷尔.工业铝合金[M].北京:冶金工业出版社,1981.
• [12]杜爱华,龙晋明,裴和中.高强铝合金应力腐蚀研究进展[J].中国腐蚀与防护学报,2008,28(4):251-255.DU Ai-hua,LONG Jin-ming,PEI He-zhong.Investigation of stress corrosion cracking of7xxx series aluminum alloys[J].Journal of Chinese Societyfor Corrosion and Protection,2008,28(4):251-255.

文章评论(Comment)：