AZ80镁合金第二相体积分数对其拉伸性能的影响
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摘要
通过对AZ80镁合金进行不同温度和时间下的固溶时效处理,然后在室温下进行拉伸试验,获得AZ80镁合金的拉伸性能数据。在光学显微镜下观察不同热处理状态下的第二相分布,并利用Micro-image Analysis&Process软件测定第二相的体积分数。将所得的数据利用MATLAB软件进行模拟拟合。结果表明,当固溶温度为350℃,固溶时间为5 h,时效温度为180℃,时效时间为24 h时,AZ80镁合金的抗拉强度最大,达到344. 4 MPa; AZ80镁合金的第二相体积分数(Ψ)与伸长率(A)的以10为底的对数值之间存在线性关系,并且关系式为lg(A)=-0. 0055×Ψ+1. 29。
The room temperature tensile properties of AZ80 magnesium alloy treated at different temperatures and holding for different time were obtained by tensile tests. The secondary phase distribution was observed under optical microscope and the volume fraction of the second phase was determined by Micro-image Analysis & Process software. The obtained data are simulated and fitted by MATLAB. The results show that the maximum tensile strength of AZ80 magnesium alloy reaches 344. 4 MPa when the solution temperature is 350 ℃,the solution time is 5 h,the aging temperature is 180 ℃ and the aging time is 24 h. There is a linear relationship between the volume fraction of the secondary phase (Ψ)and the lg value of the elongation (A) of AZ80 magnesium alloy,and the relationship is lg (A) =-0. 0055 × Ψ + 1. 29.
The room temperature tensile properties of AZ80 magnesium alloy treated at different temperatures and holding for different time were obtained by tensile tests. The secondary phase distribution was observed under optical microscope and the volume fraction of the second phase was determined by Micro-image Analysis & Process software. The obtained data are simulated and fitted by MATLAB. The results show that the maximum tensile strength of AZ80 magnesium alloy reaches 344. 4 MPa when the solution temperature is 350 ℃,the solution time is 5 h,the aging temperature is 180 ℃ and the aging time is 24 h. There is a linear relationship between the volume fraction of the secondary phase (Ψ)and the lg value of the elongation (A) of AZ80 magnesium alloy,and the relationship is lg (A) =-0. 0055 × Ψ + 1. 29.
引文
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[3]张菊梅,蒋百灵,王志虎,等.固溶及时效处理对AZ80镁合金显微组织的影响[J].金属热处理,2007,32(10):6-10.Zhang Jumei,Jiang Bailing,Wang Zhihu,et al.Effect of solid solution and aging treatment on Microstructure of AZ80 magnesium alloy[J].Heat Treatment of Metals,2007,32(10):6-10.
[4]李艳辉,李保成,尹丛娟.时效处理对AZ80镁合金组织与性能的影响[J].热加工工艺,2009,38(10):172-174.Li Yanhui,Li Baocheng,Yin Congjuan.Effect of aging treatment on the structure and properties of AZ80 magnesium alloy[J].Hot Working Technology,2009,38(10):172-174.
[5]韩东.热处理工艺对AZ80合金显微组织和力学性能的影响[J].铸造技术,2015,36(3):644-646.Han Dong.Effect of heat treatment process on Microstructure and mechanical properties of AZ80 alloy[J].Foundry Technology,2015,36(3):644-646.
[6]李兆智,杨亚琴,张治民,等.AZ80镁合金热变形中第二相析出机理研究[J].热加工工艺,2009,38(16):19-21.Li Zhaozhi,Yang Yaqin,Zhang Zhimin,et al.Study on the mechanism of second phase precipitation during hot deformation of AZ80magnesium alloy[J].Hot Working Technology,2009,38(16):19-21.
[7]邹曦,高永毅,李学军,等.位错滑移模型及其实现方法[J].振动,测试与诊断,2013,33(s1):86-90.Zou Xi,Gao Yongyi,Li Xuejun,et al.Dislocation slip model and its realization method[J].Journal of Vibration,Measurement and Diagnosis,2013,33(s1):86-90.
[8]葛庭燧.位错理论的继承、分析、应用和发展[J].科学通报,1962(7):1-21.Ge Tingsui.Inheritance,analysis,application and development of dislocation theory[J].Scientific Bulletin,1962(7):1-21.
[9]葛凯晨.固溶时效处理对AZ80镁合金组织及力学性能的影响[D].西安:西安理工大学,2008.
[10]王军,朱秀荣,徐永东,等.稀土Ce和Y对AZ80镁合金组织和力学性能的影响[J].中国有色金属学报,2014(1):25-35.Wang Jun,Zhu Xiurong,Xu Yongdong,et al.Effects of rare-earth Ce and Y on microstructure and mechanical properties of AZ80 Mg alloys[J].The Chinese Journal of Nonferrous Metals,2014(1):25-35.
[11]唐伟,韩恩厚,徐永波,等.热处理对AZ80镁合金结构及性能的影响[J].金属学报,2005,41(11):1199-1206.Tang Wei,Han Enhou,Xu Yongbo,et al.Effect of heat treatment on microstructure and properties of AZ80 magnesium alloy[J].Acta Metallurgica Sinica,2005,41(11):1199-1206.