戚尧,李全安,陈晓亚,史浩鹏

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心

摘要(Abstract)：

采用X射线衍射仪、光学显微镜、扫描电镜、能谱仪、电子拉伸实验机等研究了时效态Mg-5Y-3Sm-xHo-0.5Zr(x=0、2、4、6,mass%)合金的显微组织和力学性能。结果表明:时效态Mg-5Y-3Sm-0.5Zr合金的组织由α-Mg基体和第二相Mg_(24)Y_5、Mg_(41)Sm_5组成,添加稀土元素Ho后有新相Mg_(24)Ho_5生成;适量Ho的添加能够细化时效态Mg-5Y-3Sm-0.5Zr合金的晶粒,提高其室温及高温力学性能;在室温(20℃)～250℃温度范围内,合金的抗拉强度均随Ho含量的增加呈现先增大后减小的趋势,除200℃略有不同外,合金的抗拉强度均在Ho含量为4%时达到峰值。含4%Ho的合金在不超过150℃时,强度非常稳定,对温度变化不敏感;合金拉伸断裂方式主要表现为脆性断裂,当拉伸温度升高时,呈现向微孔聚集断裂转变的趋势。

关键词(KeyWords)： Mg-5Y-3Sm-0.5Zr;Ho;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084)

作者(Author): 戚尧,李全安,陈晓亚,史浩鹏

DOI: 10.13289/j.issn.1009-6264.2020-0338

参考文献(References)：

• [1]师昌绪，李恒德，王淀佐，等．加速我国金属镁工业发展的建议[J]．材料导报，2001(4):5-6.SHI Chang-xu,LI Heng-de,WANG Dian-zuo,et al.A proposal on accelerating development of metallic magnesium industry in China[J].Materials Review,2001(4):5-6．
• [2]Smola B,Stul lkováI,Buch F V,et al.Structural aspects of high performance Mg alloys design[J].Materials Science and Engineering A,2002,324(1):113-117．
• [3]冯义成，张佳鹏，陈宏涛，等．热处理对Mg-6Nd-2Al合金显微组织和力学性能的影响[J]．材料热处理学报，2020,41(5):42-50.FENG Yi-cheng,ZHANG Jia-peng,CHEN Hong-tao,et al.Effect of heat treatment on microstructure and mechanical properties of Mg-6Nd-2Al alloy[J].Transactions of Materials and Heat Treatment,2020,41(5):42-50．
• [4]谢建昌，李全安，李建弘，等．耐热镁合金及其开发思路[J]．铸造技术，2008,29(1):124-127.XIE Jian-chang,LI Quan-an,LI Jian-hong,et al.Heat resistant magnesium alloys and developing strategies[J].Foundry Technology,2008,29(1):124-127．
• [5]Li D Q,Wang Q D,Ding W J.Effects of Ho on the microstructure and mechanical properties of Mg-Zn-Ho-Zr magnesium alloys[J].Rare Metals,2011,30(2):131-136．
• [6]Li X Q,Ma G J,Yin J,et al.Rare earth alloying:Toward high mechanical properties for magnesium alloys[J].Materials Review,2017,31(21):82-89．
• [7]巫瑞智，张景怀，尹冬松．先进镁合金制备与加工技术[M]．北京:科学出版社，2012．
• [8]Li B,Dong J,Zhang Z,et al.On the strengthening precipitate phases and phase transformation ofβ″/β'in a Mg-Sm-Zr alloy[J].Materials and Design,2017,116(2):419-426．
• [9]王文礼，张薇，雷宁宁，等．稀土元素Sm、Ce对Mg-Y系合金组织和性能的影响[J]．稀有金属材料与工程，2016,45(6):1473-1476.WANG Wen-li,ZHANG Wei,LEI Ning-ning,et al.Effect of Sm and Ce addition on microstructures and mechanical properties of Mg-Y series magnesium alloy[J].Rare Metal Materials and Engineering,2016,45(6):1473-1476．
• [10]张清，王莹，李萍．Mg-5Y-3Sm合金的组织与性能稳定性研究[J]．铸造技术，2018,39(7):1401-1403.ZHANG Qing,WANG Ying,LI Ping.Study on microstructure and mechanical properties stability of Mg-5Y-3Sm alloy[J].Foundry Technology,2018,39(7):1401-1403．
• [11]Li D Q,Wang Q D,Ding W J.Effects of heat treatments on microstructure and mechanical properties of Mg-4Y-4Sm-0.5Zr alloy[J].Materials Science and Engineering A,2007,448(1/2):165-170．
• [12]Peng Q M,Dong H W,Wang L D,et al.Aging behavior and mechanical properties of Mg-Gd-Ho alloys[J].Materials Characterization,2008,59(8):983-986．
• [13]刘宝忠，范燕平，刘娇娇，等．重稀土耐热镁合金的研究现状及发展[J]．材料导报，2012,26(11):110-113.LIU Bao-zhong,FAN Yan-ping,LIU Jiao-jiao,et al.Research and development of heat resistant magnesium-heavy rare earth alloys[J].Materials Review,2012,26(11):110-113．
• [14]栾军，曲晓海．Mg-x Ho二元合金的组织和性能[J]．热加工工艺，2013,42(8):77-79.LUAN Jun,QU Xiao-hai.Microstructure and properties of Mg-x Ho binary alloys[J].Hot Working Technology,2013,42(8):77-79．
• [15]邹静，杨明波，吴若愚，等．含Ho镁合金的研究现状及最新进展[J]．重庆理工大学学报，2017,31(11):80-87.ZOU Jing,YANG Ming-bo,WU Ruo-yu,et al.Current research status and development of Ho-containing magnesium alloys[J].Journal of Chongqing University of Technology,2017,31(11):80-87．
• [16]Yuan W,Panigrahi S K,Su J Q,et al.Influence of grain size and texture on Hall-Petch relationship for a magnesium alloy[J].Scripta Materialia,2011,65(11):994-997．
• [17]关海昆，李全安，陈晓亚，等．Ag含量对时效态Mg-11Gd-2Y-0.5Zr合金组织和力学性能的影响[J]．材料热处理学报，2019,40(10):23-29.GUAN Hai-kun,LI Quan-an,CHEN Xiao-ya,et al.Effect of Ag content on microstructure and mechanical properties of aged Mg-11Gd-2Y-0.5Zr alloy[J].Transactions of Materials and Heat Treatment,2019,40(10):23-29．
• [18]Wang J,Zhang D P,Fang D Q,et al.Effect of Y for enhanced age hardening response and mechanical properties of Mg-Ho-Y-Zr alloys[J].Journal of Alloys and Compounds,2008,454:194-200．
• [19]陈晓亚，李全安，李志涛，等．Nd对Mg-13Gd-0.5Zr合金组织和力学性能的影响[J]．稀有金属材料与工程，2019,48(12):4046-4052.CHEN Xiao-ya,LI Quan-an,LI Zhi-tao,et al.Effect of Nd on microstructure and mechanical properties of Mg-13Gd-0.5Zr alloy[J].Rare Metal Materials and Engineering,2019,48(12):4046-4052.

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