段超,黄金亮

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心

摘要(Abstract)：

通过OM、XRD、DSC、SEM和力学性能测试等手段,研究了挤压态LAZ941-0.5Y合金经不同的固溶时效处理后的组织和力学性能。结果表明:挤压态合金经固溶处理后,MgLi_2Al和AlLi相完全溶入基体,产生显著的固溶强化效果;50℃时效初期,溶质原子扩散缓慢导致析出动力不足,过饱和基体中析出短棒状的MgLi_2A过渡相,随时效时间延长,MgLi_2A相发生形貌转变,由短棒状变成点状;随时效温度的升高,溶质原子扩散速率加快,MgLi_2A相析出速率变快,部分MgLi_2A亚稳相分解为AlLi相,同时有AlLi从基体中析出。合金的峰值时效在50℃时效0.5 h时发生,随温度的升高很快发生过时效,其主要原因是AlLi软化相的出现。

关键词(KeyWords)： LAZ941-0.5Y合金;固溶时效;析出相;硬度;拉伸性能

Abstract:

Keywords:

基金项目(Foundation): 河南省有色金属重点实验室基金(2011YSKF12)

作者(Author): 段超,黄金亮

DOI: 10.13289/j.issn.1009-6264.2017-0168

参考文献(References)：

• [1]张密林,Elkin F M.超轻Mg-Li合金[M].北京:科学出版社,2010:1-5.
• [2]余琨,黎文献,王日初,等.变形镁合金的研究、开发及应用[J].中国有色金属学报,2003,13(2):277-288.YU Kun,LI Wen-xian,WANG Ri-chu,et al.Research,development and application of wrought magnesium alloys[J].The Chinese Journal of Nonferrous Metals,2003,13(2):277-288.
• [3]曾迎,蒋斌,李瑞红,等.合金元素对Mg-Li合金组织及性能的影响[J].铸造,2012,61(3):275-279.ZENG Ying,JIANG Bin,LI Rui-hong,et al.Effect of alloying elements on microstructure and properties of Mg-Li alloy[J].China Foundry,2012,61(3):275-279.
• [4]王涛,张密林,牛中毅,等.Mg-Li-Al-Zn-RE合金铸态和退火态的组织与性能[J].金属热处理,2008,33(2):5-8.WANG Tao,ZHANG Mi-lin,NIU Zhong-yi,et al.Microstructure and properties of the as-cast and annealing Mg-Li-Al-Zn-RE alloys[J].Heat Treatment of Metals,2008,33(2):5-8.
• [5]PENG Xiao-dong,LI Jun-chen,LI Wen-juan,et al.Effect of Y on microstructure and mechanical properties as well as corrosion resistance of Mg-9Li-3Al alloy[J].Rare Metal Materials and Engineering,2013,42(10):1993-1998.
• [6]张焜禹,刘兴海,马自在,等.热处理对Mg-10.83Li-2.62Al-0.34Si合金组织与性能的影响[J].材料热处理学报,2014,35(4):96-100.ZHANG Kun-yu,LIU Xing-hai,MA Zi-zai,et al.Effect of heat treatment on microstructure and mechanical properties of Mg-10.83Li-2.62Al-0.34Si alloy[J].Transactions of Materials and Heat Treatment,2014,35(4):96-100.
• [7]WU Horng-yu,GAO Zhen-wei,LIN Jia-yu,et al.Effects of minor scandium addition on the properties of Mg-Li-Al-Zn alloy[J].Journal of Alloys and Compounds,2009,474(1):158-163.
• [8]李劲风,郑子樵,李世晨,等.热处理对Mg-10.02Li-3.86Zn-2.54Al-1.76Cu合金力学性能的影响[J].稀有金属材料与工程,2005,34(11):1770-1773.LI Jin-feng,ZHENG Zi-qiao,LI Shi-chen,et al.Effect of heat treatment on mechanical properties of Mg-10.02Li-3.86Zn-2.54Al-1.76Cu alloy[J].Rare Metal Materials and Engineering,2005,34(11):1770-1773.
• [9]KANG Zhi-xin,LIN Kai,ZHANG Jun-yi.Characterisation of Mg-Li alloy processed by solution treatment and large strain rolling[J].Materials Science and Technology,2016,32(5):498-506.
• [10]WU Horng-yu,LIN Jia-yu,GAO Zhen-wei,et al.Effects of age heat treatment and thermomechanical processing on microstructure and mechanical behavior of LAZ1010 Mg alloy[J].Materials Science and Engineering A,2009,523(1/2):7-12.
• [11]郭旭英.Mg-9Li-6Al-x Y(x=0,0.5,2)合金及其热处理行为的研究[D].哈尔滨:哈尔滨工程大学,2014:38-40.GUO Xu-ying.Study on Mg-9Li-6Al-x Y(x=0,0.5,2)alloys and their heat-treatment behaviors[D].Harbin:Harbin Engineering University,2014:38-40.
• [12]LI Ji-qing,AN Jiang-min,QU Zhi-kun,et al.Effects of solution heat treatment on the microstructure and hardness of Mg-5Li-3Al-2Zn-2Cu alloy[J].Materials Science and Engineering A,2010,527(26):7138-7142.
• [13]王涛,张密林,巫瑞智,等.Mg-8.5Li-3Al-x Ce系合金的时效行为研究[J].稀有金属材料与工程,2013,42(1):94-98.WANG Tao,ZHANG Mi-lin,WU Rui-zhi,et al.Aging behavior of Mg-8.5Li-3Al-x Ce alloy[J].Rare Metal Materials and Engineering,2013,42(1):94-98.
• [14]湛海波.Mg-9Li-x Al(x=3,6)合金时效析出行为的研究[D].哈尔滨:哈尔滨工程大学,2012:48-52.ZHAN Hai-bo.Study on the aging precipitation behavior of Mg-9Li-x Al(x=3,6)alloys[D].Harbin:Harbin Engineering University,2012:48-52.

文章评论(Comment)：