彭建,古东懂,刘正涛,魏效明,张丁非

• 1:重庆大学材料科学与工程学院机械传动国家重点实验室
• 2:重庆科学技术研究院

摘要(Abstract)：

将挤压态Mg-4Gd合金沿挤压方向进行10%预拉伸处理,然后研究了时效处理对预变形后合金组织和力学性能的影响。结果表明:预拉伸处理产生加工硬化的同时促进了变形镁合金中灰暗过渡相及明亮平衡相的形核,时效过程加速了过渡相的形成及其向平衡相的转化。随着时效温度升高,明亮平衡相的平均尺寸增加。预拉伸试样经时效处理可提高力学性能,当时效工艺为210℃×24 h时,合金综合力学性能最佳,其硬度、屈服强度、抗拉强度和伸长率分别为66.65 HV0.1、137.4 MPa、245.4 MPa和22.1%;时效温度升高使得合金的峰值硬度降低,但达到硬度峰值所需时间缩短且强度和伸长率均保持在较高水平。

关键词(KeyWords)： 预拉伸;时效;力学性能;Mg-Gd合金

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2016YFB0301100);; 中央高校基本科研业务费(2018CDJDCD0001);; 重庆市重点自然科学基金(cstc2017jcyjBX0040)

作者(Author): 彭建,古东懂,刘正涛,魏效明,张丁非

DOI: 10.13289/j.issn.1009-6264.2019-0376

参考文献(References)：

• [1] Liu J,Yang L X,Zhang C Y,et al.Significantly improved corrosion resistance of Mg-15Gd-2Zn-0.39Zr alloys:Effect of heat-treatment[J].Journal of Materials Science and Technology,2019,35(8):1644-1654.
• [2] Hoseini-Athar M M,Mahmudi R.Effect of Zn content on hot deformation behavior of extruded Mg-Gd-Zn alloys[J].Materials Science and Engineering A,2019,759:745-753.
• [3] Wu G H,Nodooshan H R J,Zeng X Q,et al.Microstructure and high temperature tensile properties of Mg-10Gd-5Y-0.5Zr alloy after thermo-mechanical processing[J].Metals,2018,8(12):980-992.
• [4] 刘洪挺.Zn及预变形对挤压Mg-10Gd-4.8Y-0.6Zr合金组织及室温力学性能的影响[D].长沙:中南大学,2011.LIU Hong-ting.Effect of Zn and pre-deformation on microstructure and mechanical properties of extruded Mg-10Gd-4.8Y-0.6Zr alloy at room temperature[D].Changsha:Central South University,2011.
• [5] 张诗昌,杨广,康龙武,等.预变形及退火处理提高AZ31镁合金的塑性[J].材料科学与工程学报,2015,33(3):324-328.ZHANG Shi-chang,YANG Guang,KANG Long-wu,et al.Plasticity improvement of AZ31 magnesium alloy by prestrain and anneal treatment[J].Journal of Materials Science and Engineering,2015,33(3):324-328.
• [6] 林小娉,唐琴,叶杰,等.预压缩变形Mg-Zn-Y-Zr合金的微观组织及时效硬化效应[J].中国稀土学报,2019,37(2):217-223.LIN Xiao-pin,TANG Qin,YE Jie,et al.Effect of pre-compression Mg-Zn-Y-Zr alloy's microstructure and strain aging property[J].Journal of the Chinese Society of Rare Earths,2019,37(2):217-223.
• [7] 潘少彬,王智祥,叶艳君,等.形变时效对Cu-1.3Ni-0.3Si合金力学性能及导电率的影响[J].有色金属(冶炼部分),2017,69(8):54-58.PAN Shao-bin,WANG Zhi-xiang,YE Yan-jun,et al.Effect of deformation aging on mechanical properties and electrical conductivity of Cu-1.3Ni-0.3Si alloy[J].Nonferrous Metals(Extractive Metallurgy),2017,69(8):54-58.
• [8] 周明哲,易丹青,贾延琳,等.预变形对2E12铝合金时效析出过程的影响[J].稀有金属材料与工程,2010,39(12):2107-2111.ZHOU Ming-zhe,YI Dan-qing,JIA Yan-lin,et al.Effect of pre-deformation on aging precipitation process of 2E12 aluminum alloy[J].Rare Metal Materials and Engineering,2010,39(12):2107-2111.
• [9] Tork,Razavi S H,Saghafian H,et al.Microstructural evolution and mechanical properties of the as-cast and extruded Mg-Gd alloys[J].Advances Engineering Materials,2016,18(1):156-161.
• [10] Yassar,Field D P,Weiland H.The effect of cold deformation on the kinetics of the β″ precipitates in an Al-Mg-Si alloy[J].Metallurgical and Materials Transactions A,2005,36(8):2059-2065.
• [11] 汤伊金,章桢彦,靳丽,等.Mg-Gd系合金时效析出研究进展[J].中国有色金属学报,2014,24(1):8-24.TANG Yi-jin,ZHANG Zhen-yan,JIN Li,et al.Research progress on ageing precipitation of Mg-Gd alloys[J].The Chinese Journal of Nonferrous Metals,2014,24(1):8-24.
• [12] Rosalie,Somekawa H,Singh A,et al.The effect of size and distribution of rod-shaped beta' (1) precipitates on the strength and ductility of a Mg-Zn alloy[J].Materials Science and Engineering A,2012,539:230-237.
• [13] 王梦寒,咸国材,黄龙.时效温度对轧制态7075铝合金组织及性能的影响[J].金属热处理,2014,39(5):129-131.WANG Meng-han,XIAN Guo-cai,WANG Long.Effects of aging temperature on microstructure and mechanical properties of as-rolled 7075 aluminum alloy[J].Heat Treatment of Metals,2014,39(5):129-131.
• [14] 李露冉,孙威,刘林林.合金元素对Mg-Gd系合金组织及时效硬化行为的影响[J].稀有金属,2012,36(1):19-24.LI Lu-ran,SUN Wei,LIU Lin-lin.Effect of alloying elements on microstructure and aging hardening behaviors of Mg-Gd based alloys[J].Chinese Journal of Rare Metals,2012,36(1):19-24.
• [15] Vostry P,Smola B,Stulikova I,et al.Microstructure evolution in isochronally heat treated Mg-Gd alloys[J].Physica Status Solidi a-Applied Research,1999,175 (2):491-500.
• [16] 韩骜桀,周昌玉,常乐,等.预扭转及退火热处理对TA2拉伸力学性能的影响[J].稀有金属材料与工程,2019,48(4):1231-1238.HAN Ao-jie,ZHOU Chang-yu,CHANG Le,et al.Influence of pre-torsion and annealing heat treatment on the tensile mechanical properties of TA2[J].Rare Metal Materials and Engineering,2019,48(4):1231-1238.
• [17] Guo,Zhao S C,Wang L P,et al.Enhanced age strengthening of Mg-Nd-Zn-Zr alloy via pre-stretching[J].Metals,2016,6(9):196-207.
• [18] 段超,黄金亮.固溶时效对挤压态LAZ941-0.5Y合金组织和力学性能的影响[J].材料热处理学报,2017,38(9):30-35.DUAN Chao,HUANG Jin-liang.Effect of solution and aging treatment on microstructure and mechanical properties of LAZ941-0.5Y alloy[J].Transactions of Materials and Heat Treatment,2017,38(9):30-35.

文章评论(Comment)：