王会敏,易幼平,黄始全

• 1:中南大学高性能复杂制造国家重点实验室
• 2:中南大学机电工程学院

摘要(Abstract)：

采用力学性能测试、XRD、扫描电镜和透射电镜观察等手段,研究了冷热循环处理对6061铝合金组织和力学性能的影响。结果表明:经过1次冷热循环处理之后时效,6061铝合金的衍射峰值出现了明显的变化,44.70方向的衍射强度明显增加,出现了择优取向;同时,晶内析出均匀弥散分布的针状β″(Mg_2Si)相,晶界析出粗大的棒状β(Mg_2Si)相,且由连续分布转变为不连续分布,无析出带变窄。与传统T6态相比,抗拉强度、屈服强度和伸长率由348.1 MPa、300.4 MPa和15.7%分别提高到373.4MPa、321.6 MPa和17.2%。

关键词(KeyWords)： 6061铝合金;冷热循环;力学性能;择优取向

Abstract:

Keywords:

基金项目(Foundation): 江苏省科技计划(BA2015075);; 高性能复杂制造国家重点实验室资助项目(zzyjkt2014-02)

作者(Author): 王会敏,易幼平,黄始全

DOI: 10.13289/j.issn.1009-6264.2016.10.012

参考文献(References)：

• [1]杜鹏,闫晓东,李彦利,等.6061铝合金中富铁相在均匀化过程中的相变机理[J].中国有色金属学报,2011,21(5):981-987.DU Peng,YAN Xiao-dong,LI Yan-li,et al.Transformation mechanism of iron-rich phase in 6061 aluminum alloy during homogenization[J].The Chinese Journal of Nonferrous Metals,2011,21(5):981-987.
• [2]李彩文,潘学著,刘露露,等.在线淬火对6061、6005铝合金型材组织和性能的影响[J].金属热处理,2010,35(6):67-71.LI Cai-wen,PAN Xue-zhu,LIU Lu-lu,et al.Effect of on-line quenching on microstructure and mechanical properties of 6061 and 6005 alloy profile[J].Heat Treatment of Metals,2010,35(6):67-71.
• [3]丁向群,何国求,陈成澎,等.6000系汽车车用铝合金的研究应用进展[J].材料科学与工程学报,2005,23(2):302-305.DING Xing-qun,HE Guo-qiu,CHEN Cheng-peng,et al.Advance in studies 6000 aluminum alloy for automobile[J].Journal of Materials Science and Engineering,2005,23(2):302-305.
• [4]Niranjani V L,Hari Kumar K C,Subramanya Sarma V.Development of high strength Al-Mg-Si AA6061 alloy through cold rolling and ageing[J].Materials Science and Engineering A,2009,515(1/2):169-174.
• [5]WANG Ji,FU Rui-dong,LI Yi-jun,et al.Effects of deep cryogenic treatment and low-temperature aging on the mechanical properties of friction-stirwelded joints of 2024-T351 aluminum alloy[J].Materials Science and Engineering A,2014,609(7):147-153.
• [6]Amini K,Akhbarizadeh A,Javadpour S.Investigation the effect of quench environment and deep cryogenic treatment on the wear behavior of AZ91[J].Materials and Design,2014,54():154-160.
• [7]杨晶,张文达,郑铠东,等.深冷处理时间对A319合金显微组织和力学性能的影响[J].材料热处理学报,2014,35(6):181-184.YANG Jing,ZHANG Wen-da,ZHENG Kai-dong,et al.Effect of deep cryogenic treatment time on microstructure and tensile strength of A319 alloy[J].Transactions of Materials and Heat Treatment,2014,35(6):181-184.
• [8]汤光平,黄文荣.循环处理对铝合金尺寸稳定性的影响[J].金属热处理,1999,34(12):35-37.TANG Guang-ping,HUANG Wen-rong.Effect of cyclic treatment on dimensional stabilization of A1 alloys[J].Heat Treatment of Metals,1999,34(12):35-37.
• [9]Lulay K E,Khan K,Chaaya D.The effect of cryogenic treatment on 7075 aluminum alloy[J].Journal of Material Engineering and Performance,2002,11(5):479-480.
• [10]Chen Ding.Preferred grain orientation of aluminum and aluminum alloys after cryogenic treatment[J].Metal,2008,62(11):744-748.
• [11]CHEN Guo-qing,FU Xue-song,ZHAO Fei,et al.Microstructure and mechanical properties of 2A12 aluminum alloy after age forming[J].Transactions of Nonferrous Metals Society of China,2012,22(8):1975-1980.
• [12]Andersen S J,Zandbergen H W,Jansen J,et al.The crystal structure of theβ″phase in Al-Mg-Si alloys[J].Acta Materialia,1998,46(9):3283-3298.
• [13]潘青林,李绍禄,邹景霞,等.微量Mn对A1-Mg-Si合金微观组织与拉伸性能的影响[J].中国有色金属学报,2002,12(5):972-976.PAN Qing-lin,LI Shao-lu,ZOU Jing-xia,et al.Effects of minor manganese addition on Microstructures and tensile properties of Al-Mg-Si alloys[J].The Chinese Journal of Nonferrous Metals,2002,12(5):972-976.
• [14]Ravi C,Wolverton C.First-principles study of crystal structure and stability of Al-Mg-Si-(Cu)precipitates[J].Acta Materialia,2004,52(14):4213-4218.

文章评论(Comment)：