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《Materials for Mechanical Engineering》 2013-05
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Effect of Different Aging Treatmrnts on Mechanical Properties and Intergranular Corrosion Properties of Al-0.42Mg-0.50Si-0.99Cu Alloy

YIN De-yan1,3,YANG Fu-liang1,2,HUANG Ke1,2,MA Kai1,2(1.School of Material Science and Engineering;2.Key Laboratory of Nonferrous Metal Materials Science and Engineering,Ministry of Education,Central South University,Changsha 410083,China; 3.Changsha New Zhensheng Group Co.,Ltd.,Changsha 410100,China)  
A new type of Al-Mg-Si-Cu aluminum alloy was designed,and the alloy composition was Al-0.42Mg-0.50Si-0.99Cu.The effects of different aging treatments on microstructure,mechanical properties and corrosion behavior were studied by optical microscopy,transmission electron microscopy and means of conventional tensile test.The results show that no distinct grain boundary precipitates were observed in T6 under-aging state and the grain boundary precipitates are small and continuously distributed in T6 peak-aging state,and intergranular corrosion was serious.With the increase of aging time,Q′ phase increased and coarsened,the grain boundary precipitates were coarsened obviously and sparsely distributed.In double aging state,there are plenty of Q′ precipitates in matrix,grain boundaries precipitates were spheroidization,the spacing between precipitated phases increased,precipitated phaseand were continuously distributed and the PFZ was broaden.In T6 peak-aging state,the alloy had the most serious intergranular corrosion tendency and had the highest strength,however,the corrosion resistance was obviously improved while tensile strength was a little decrease in double aging state.
【Fund】: 国家“863”高新技术研究资助项目(2003AA332070);; 长沙市科技成果产业化资金专项资助项目(K0902002-11)
【CateGory Index】: TG156.92
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【Citations】
Chinese Journal Full-text Database 2 Hits
1 LIU Ya-ni,CHEN Jiang-hua,YIN Mei-jie,LIU Chun-hui,WU Cui-lan,ZHAO Xin-qi(Center for High-Resolution Electron Microscopy of College of Materials Science and Engineering,Hunan University,Changsha Hunan 410082,China);The influences of natural ageing and Cu addition on the age hardening behavior of AlMgSi(Cu) alloys[J];Journal of Chinese Electron Microscopy Society;2010-03
2 JIN Man,SHAO Guang-jie(School of Materials Science and Engineering,Shanghai University,Shanghai 200072,China);Effect of Cu addition on precipitation behavior in Al-Mg-Si alloy[J];Transactions of Materials and Heat Treatment;2009-03
【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 LIAO Yuan-fei,CHEN Jiang-hua*,LIU Chun-hui,LI Xiang-liang,FENG Jia-ni(College of Materials Science and Engineering,Hunan University,Changsha Hunan 410082,China);An electron microscopy study of precipitate coarsening in Al-Mg-Si-Cu alloys[J];Journal of Chinese Electron Microscopy Society;2012-02
2 LIU Hong~(1,2), ZHAO Gang~1, LIU Chun-ming~1, LIU Yan-dong~1, ZUO Liang~1 (1. Northeastern University, Shenyang 110004, China; 2. Shandong Institute of Light Industry, Jinan 250100, China);Advances in Research on Microstructure and Properties of 6000 Series Aluminium Alloys[J];Materials For Mechanical Engineering;2004-06
3 SANG Yi,CHEN Jiang-hua*,LIU Chun-hui,WANG Shi-hao,HUANG Chang-jun(College of Materials Science and Engineering,Hunan University,Changsha Hunan 410082,China);A comparison study of precipitation behaviors in three Al-Mg-Si alloys with different Mg/Si composition ratios[J];Journal of Chinese Electron Microscopy Society;2012-05
4 WANG Shi-hao,CHEN Jiang-hua*,LIU Chun-hui,SANG Yi,WANG Yi-wen,LONG Hui-Chi(College of Materials Science and Engineering,Hunan University,Changsha Hunan 410082,China);Effects of multi-step aging on mechanical property and microstructure of Al-Mg-Si-(Cu) alloy[J];Journal of Chinese Electron Microscopy Society;2012-05
5 FENG Jia-ni,CHEN Jiang-hua,LIU Chun-hui,LIAO Yuan-fei,LI Xiang-liang(College of Materials Science and Engineering,Hunan University,Changsha Hunan 410082,China);Effects of pre-aging treatments on the microstructures and properties before and after paint bake cycle for a 6016 aluminum alloy[J];Journal of Chinese Electron Microscopy Society;2012-06
6 LI Xiangliang,CHEN Jianghua,LIU Chunhui,FENG Jiani,WANG Shihao College of Materials Science and Engineering,Hunan University,Changsha 410082;EFFECTS OF T6 AND T78 TEMPERS ON THE MICROSTRUCTURES AND PROPERTIES OF Al-Mg-Si-Cu