Effect of Natural Aging on Microstructure and Mechanical Properties of 6061 Aluminum Alloy
摘 要
采用拉伸试验、透射电镜分析等方法研究了自然时效对6061铝合金显微组织和力学性能的影响。结果表明: 自然时效1个月后, 铝合金基体中析出少量极细小的球状GP区, 而人工时效6 h则析出大量GP区和板条状β-Mg2Si平衡相; 自然时效1个月后再进行人工时效的析出相较直接进行人工时效态的少; 随着自然时效时间的延长, 铝合金强度逐渐升高, 伸长率逐渐降低, 1个月后性能趋于稳定, 抗拉强度和屈服强度分别为217.27和130.78 MPa, 此时具有较高的伸长率, 为18.40%; 自然时效1个月后再进行4 h人工时效可获得较好的综合性能, 抗拉强度、屈服强度和伸长率分别为273.72 MPa,228.63 MPa和11.16%, 与直接进行人工时效的相比, 抗拉强度、屈服强度稍有下降, 但伸长率提高了11.6%。
Abstract
Effect of natural aging on microstructure and mechanical properties of the 6061 aluminum alloy was investigated by tensile test and transmission electron microscopy. The results show that a few tiny spherical GP zones precipitated from the matrix of aluminum alloy after natural aging for one month. A great quantity of GP zones and lath-like β-Mg2Si equilibrium phase precipitated after artificial aging for 6 h. More precipitate phases were found in the alloy after natural aging for one month at first then artificial aging when compared with the alloy after direct artificial aging. With the prolongation of natural aging time, strength of the aluminum alloy gradually increased and elongation gradually decreased. The properties tended to be stable after one month, that the tensile and yield strength, elongation were 217.27 MPa, 130.78 MPa and 18.40%, respectively. Good comprehensive properties could be obtained after natural aging for one month and artificial aging for 4 h, that the tensile and yield strength, elongation were 273.72 MPa, 228.63 MPa and 11.16%. Comparing with the alloy after direct artificial aging, the tensile strength and yield strength decreased slightly, and the elongation increased by 11.6%.
中图分类号 TG146.2
所属栏目
基金项目 湖南大学汽车车身先进设计制造国家重点实验室自主研究课题项目(60870005); 教育部长江学者与创新团队发展计划资助项目(531105050037); 湖南省杰出青年基金资助项目(09JJ1007); 重庆市科技攻关计划项目(CSTC,2007AA4008)
收稿日期 2010/1/11
修改稿日期 2010/10/6
网络出版日期
作者单位点击查看
备注冯银成(1984-), 男, 湖北黄冈人, 硕士研究生。
引用该论文: FENG Yin-cheng,LI Luo-xing,LIU Jie,LIU Bo,LIU Yang-sheng. Effect of Natural Aging on Microstructure and Mechanical Properties of 6061 Aluminum Alloy[J]. Materials for mechancial engineering, 2011, 35(3): 18~21
冯银成,李落星,刘杰,刘波,刘扬胜. 自然时效对6061铝合金显微组织和力学性能的影响[J]. 机械工程材料, 2011, 35(3): 18~21
共有人对该论文发表了看法,其中:
人认为该论文很差
人认为该论文较差
人认为该论文一般
人认为该论文较好
人认为该论文很好
参考文献
【1】黄伯云, 李成功, 石力开, 等.中国材料工程大典[M].北京:化学工业出版社,2005.
【2】许珞萍, 邵光杰.汽车轻量化用金属材料及其发展动态[J].上海金属,2002,24(3):1-7.
【3】CHOU C Y, HSU C W, LEE S L,et al. Effects of heat treatments on AA6061 aluminum alloy deformed by cross-channel extrusion[J].Journal of Materials Processing Technology,2008,202:1-6.
【4】丁向群, 何国求, 陈成澍, 等.6000系汽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.
【5】GAVGALI M, TOTIK Y, SADELER R. The effects of artificial aging on wear properties of AA6063 alloy[J].Materials Letters,2003,57(24/25):3713-3721.
【6】彭志辉, 甘卫平.汽车工业用铝材的开发与应用[J].汽车工艺与材料,1999(4):1-6.
【7】黄佩贤.轻质材料铝合金在汽车上的应用[J].上海汽车,2002(1):37-38.
【8】KIM H H, CHO S H, KANG C G. Evaluation of microstructure and mechanical properties by using nano/micro-indentation and nanoscrath during aging treatment of reho-forged Al6061 alloy[J].Materials Science and Engineering A,2008,485:272-281.
【9】张胜华, 章冰, 肖荫果.时效制度对6063合金导热性能和硬度的影响[J].铝加工,2003(3):13-16.
【10】张鸿俭, 王玉林.6063合金的停放效应研究[J].金属科学与工艺,1989,8(3/4):37-41.
【11】MAHADEVAN K, RAGHUKANDAN K, SENTHILVELAN T,et al. Studies on the effect of delayed aging on the mechanical behaviour of AA6061 SiCp composite[J].Materials Science and Engineering A,2005,396:188-193.
【12】顾景城.铝合金时效过程[J].轻合金加工技术,1985(3):25-28.
【2】许珞萍, 邵光杰.汽车轻量化用金属材料及其发展动态[J].上海金属,2002,24(3):1-7.
【3】CHOU C Y, HSU C W, LEE S L,et al. Effects of heat treatments on AA6061 aluminum alloy deformed by cross-channel extrusion[J].Journal of Materials Processing Technology,2008,202:1-6.
【4】丁向群, 何国求, 陈成澍, 等.6000系汽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.
【5】GAVGALI M, TOTIK Y, SADELER R. The effects of artificial aging on wear properties of AA6063 alloy[J].Materials Letters,2003,57(24/25):3713-3721.
【6】彭志辉, 甘卫平.汽车工业用铝材的开发与应用[J].汽车工艺与材料,1999(4):1-6.
【7】黄佩贤.轻质材料铝合金在汽车上的应用[J].上海汽车,2002(1):37-38.
【8】KIM H H, CHO S H, KANG C G. Evaluation of microstructure and mechanical properties by using nano/micro-indentation and nanoscrath during aging treatment of reho-forged Al6061 alloy[J].Materials Science and Engineering A,2008,485:272-281.
【9】张胜华, 章冰, 肖荫果.时效制度对6063合金导热性能和硬度的影响[J].铝加工,2003(3):13-16.
【10】张鸿俭, 王玉林.6063合金的停放效应研究[J].金属科学与工艺,1989,8(3/4):37-41.
【11】MAHADEVAN K, RAGHUKANDAN K, SENTHILVELAN T,et al. Studies on the effect of delayed aging on the mechanical behaviour of AA6061 SiCp composite[J].Materials Science and Engineering A,2005,396:188-193.
【12】顾景城.铝合金时效过程[J].轻合金加工技术,1985(3):25-28.
相关信息