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采用光学显微镜、X射线衍射仪、扫描电镜以及电子拉伸试验机等研究了不同热处理工艺及Zn元素对Mg-10Gd-3Sm(-1Zn)-0.5Zr(mass%)合金微观组织和力学性能的影响。结果表明：Zn元素的加入可以有效细化晶粒，促进第二相的析出，并生成一种新相(Mg, Zn)3(Sm, Gd)1;Mg-10Gd-3Sm(-1Zn)-0.5Zr合金的最佳热处理工艺为515℃×6 h固溶及225℃×10 h时效处理；对其进行室温和高温拉伸，发现随着温度的升高，时效态Mg-10Gd-3Sm(-1Zn)-0.5Zr合金的抗拉强度表现出先增大后减小的趋势；Zn的加入使合金的抗拉强度和伸长率明显高于基体合金，表现出优异的力学性能；两种合金在室温和高温下的断裂机制均属于脆性断裂，不含Zn的基体合金脆性特征更为明显，塑性较差，而含Zn的合金断口形貌中撕裂棱和解理刻面数目较多，塑性较高。
Abstract：Influence of different heat treatment processes and Zn element on microstructure and mechanical properties of Mg-10Gd-3Sm(-1Zn)-0.5Zr(mass%) alloys was studied using optical microscope, X-ray diffractometer, scanning electron microscopy, and electron tensile testing machine. The results show that the addition of Zn element can effectively refine the grain size, promote the precipitation of the second phase, and generate a new phase(Mg, Zn)3(Sm, Gd)1. The optimal heat treatment process for the Mg-10Gd-3Sm(-1Zn)-0.5Zr alloy is solution treatment at 515 ℃ for 6 h and aging at 225 ℃ for 10 h. It is found that with the increase of tensile temperature, the tensile strength of the aged Mg-10Gd-3Sm(-1Zn)-0.5Zr alloy shows a trend of first increasing and then decreasing when subjected to room temperature and high temperature tensile tests. The addition of Zn significantly increases the tensile strength and elongation of the alloy compared to the matrix alloy, resulting in excellent mechanical properties. The fracture mechanisms of both alloys at room temperature and high temperature belong to brittle fracture. The matrix alloy without Zn has more obvious brittle characteristics and poorer plasticity, while the alloy with Zn has more tearing edges and cleavage facets in the fracture morphology and higher plasticity.
[1] Kojima Y.Project of platform science and technology for advanced magnesium alloys[J].Materials Transactions,2001,42(7):1154-1159.
[2] 郑泽宇，李全安，陈晓亚，等.Ce微合金化在镁合金中的研究现状与展望[J].材料热处理学报，2024,45(6):1-15.ZHENG Ze-yu,LI Quan-an,CHEN Xiao-ya,et al.Research status and prospects of Ce microalloying in magnesium alloys[J].Transactions of Materials and Heat Treatment,2024,45(6):1-15.
[3] Davis A E,Kennedy J R,Lunt D,et al.Preageing of magnesium alloys[J].Materials Science and Engineering A,2021,809:141002.
[4] 李中山，王梅，胡耀波，等.挤压温度对Mg-Sm-Zr合金组织与力学性能的影响[J].材料热处理学报，2023,44(7):48-56.LI Zhong-shan,WANG Mei,HU Yao-bo,et al.Effect of extrusion temperature on microstructure and mechanical properties of Mg-Sm-Zr alloy[J].Transactions of Materials and Heat Treatment,2023,44(7):48-56.
[5] 刘亚，文九巴，李欢，等.Y含量对 Mg-Zn-Gd-Y-Zr 生物镁合金组织及性能的影响[J].材料热处理学报，2021,42(10):49-55.LIU Ya,WEN Jiu-ba,LI Huan,et al.Effect of Y content on microstructure and properties of Mg-Zn-Gd-Y-Zr biological magnesium alloy[J].Transactions of Materials and Heat Treatment,2021,42(10):49-55.
[6] Bayat-Tork N,Mahmudi R,Hoseini-Athar M M,et al.Hot deformation constitutive analysis and processing maps of extruded Mg-Gd binary alloys[J].Journal of Materials Research and Technology,2020,9(6):15346-15359.
[7] Zhang J,Liu S,Wu R,et al.Recent developments in high-strength Mg-RE-based alloys:Focusing on Mg-Gd and Mg-Y systems[J].Journal of Magnesium and Alloys,2018,6(3):277-291.
[8] 孙瑞雪，陈君，陈晓亚，等.热处理对Mg-12Gd-1Zn-0.5Zr合金显微组织和力学性能的影响[J].材料热处理学报，2022,43(2):17-24.SUN Rui-xue,CHEN Jun,CHEN Xiao-ya,et al.Effect of heat treatment on microstructure and mechanical properties of Mg-12Gd-1Zn-0.5Zr alloy[J].Transactions of Materials and Heat Treatment,2022,43(2):17-24.
[9] 顾侃，肖旅，曾小勤，等.航空航天用高强度Mg-RE系合金的研究进展[J].上海航天(中英文),2022,39(6):84-95.GU Kan,XIAO Lü,ZENG Xiao-qin,et al.Recent development of high strength Mg-RE alloys for aerospace application[J].Aerospace Shanghai (Chanese and English),2022,39(6):84-95.
[10] Zhou H,Xu W,Jian W,et al.A new metastable precipitate phase in Mg-Gd-Y-Zr alloy[J].Philosophical Magazine,2014,94(21):2403-2409.
[11] 王金阳.Gd对ZMT813合金组织及性能的影响[D].重庆：重庆大学，2021.WANG Jin-yang.The effect of Gd on the microstructure and properties of ZMT813 alloy[D].Chongqing:Chongqing University,2021.
[12] Wang C,Li H,Guo E,et al.The effect of Gd on the microstructure evolution and mechanical properties of Mg-4Zn-0.6Ca alloy[J].Materials Science and Engineering A,2023,868:144756.
[13] 庞浩，李全安，陈晓亚.含钐镁合金的研究现状与应用[J].中国稀土学报，2022,40(4):561-576.PANG Hao,LI Quan-an,CHEN Xiao-ya,et al.Research status and application of samarium-containing magnesium alloys[J].Journal of the Chinese Society of Rare Earths,2022,40(4):561-576.
[14] Pang H,Bao J,Li Q,et al.Effect of Sm on microstructures and mechanical properties of Mg-Gd(-Sm)-Zr alloys by hot extrusion and aging treatment[J].Journal of Materials Research and Technology,2022,19:3877-3893.
[15] Hu Y,Yu N,Zhao L,et al.Effect of Sm on the microstructure and properties of Mg-9Al alloy[J].International Journal of Cast Metals Research,2017,30(6):317-321.
[16] Zhao J,Xu J,Liu Y,et al.Role of Zn addition on the microstructure and tensile property in Mg-Mn-Nd alloys[J].Journal of Materials Research and Technology,2023,27:7964-7969.
[17] Nie J F,Gao X,Zhu S M.Enhanced age hardening response and creep resistance of Mg-Gd alloys containing Zn[J].Scripta Materialia,2005,53(9):1049-1053.
[18] 李卓琳，李全安，陈晓亚，等.Mg-Gd-Sn-Zr合金热处理工艺优化[J].中国稀土学报，2024,11(9):1-13.LI Zhuo-lin,LI Quan-an,CHEN Xiao-ya,et al.Heat treatment process optimization of Mg-Gd-Sn-Zr alloy[J].Journal of the Chinese Society of Rare Earths,2024,11(9):1-13.
[19] Guan K,Ma R,Zhang J,et al.Modifying microstructures and tensile properties of Mg-Sm based alloy via extrusion ratio[J].Journal of Magnesium and Alloys,2021,9(3):1098-1109.
[20] Liu Y,Song Y,Li N,et al.Mechanical properties and microstructure evolution of Mg-Gd alloy during aging treatment[J].Metals,2021,12(1):39-44.
[21] Liu Z,Zhou J,Yang L,et al.Study on microstructure and properties of Mg-Al-Si-Ca alloy by heat treatment[J].Journal of Alloys and Compounds,2023,947:169431.
[22] Ma T,Zhao S,Guo E,et al.Microstructure evolution and strengthening mechanism analysis of novel Mg-RE-Ag alloy during heat treatment[J].Journal of Materials Research and Technology,2022,21:692-703.
[23] 张帅，李全安，朱宏喜，等.热处理对 Mg-11Gd-3Y-0.8Ca-0.5Zr合金显微组织及性能的影响[J].材料热处理学报，2020,41(1):19-26.ZHANG Shuai,LI Quan-an,ZHU Hong-xi,et al.Effect of heat treatment on microstructure and properties of Mg-11Gd-3Y-0.8Ca-0.5Zr alloy[J].Transactions of Materials and Heat Treatment,2020,41(1):19-26.
[24] 付三玲.Mg-Gd(-Y-Sm-Zr)耐热镁合金组织和性能研究[D].西安：西安理工大学，2016.FU San-ling.Study on the microstructure and mechanical properties of Mg-Gd(-Y-Sm-Zr) heat resistant magnesium alloys[D].Xi’an:Xi’an University of Technology,2016.
[25] 朱利敏，李全安，周耀，等.Sm对Mg-10Gd-0.5Zr合金组织及力学性能的影响[J].稀有金属材料与工程，2019,48(1):171-176.ZHU Li-min,LI Quan-an,ZHOU Yao,et al.Effect of Sm on microstructures and mechanical properties of Mg-10Gd-0.5Zr alloy[J].Rare Metal Materials and Engineering,2019,48(1):171-176.
[26] Tang C,Liu W,Chen Y,et al.Effects of thermal treatment on microstructure and mechanical properties of a Mg-Gd-based alloy plate[J].Materials Science and Engineering A,2016,659:63-75.
[27] Orlova T S,Latynina T A,Murashkin M Y,et al.Effects of Mg on strengthening mechanisms in ultrafine-grained Al-Mg-Zr alloy[J].Journal of Alloys and Compounds,2021,859:157775.
[28] Frost H J,Ashby M F.Deformation-mechanism maps:the plasticity and creep of metals and ceramics[J].Pergamon Press,Oxford,1982.
[29] Zha M,Wang S Q,Wang T,et al.Developing high-strength and ductile Mg-Gd-Y-Zn-Zr alloy sheet via bimodal grain structure coupling with heterogeneously-distributed precipitates[J].Materials Research Letters,2023,11(9):772-780.
[30] Zhang N,Li Q,Chen X,et al.Effect of different extrusion parameters on the microstructure and mechanical properties of Mg-4Sm-3Gd-2Yb-0.5 Zr alloy[J].Journal of Magnesium and Alloys,2024.
基本信息:
DOI：10.13289/j.issn.1009-6264.2024-0515
中图分类号:TG146.22;TG156
引用信息:
[1]王聪,李全安,陈晓亚,等.热处理工艺对Mg-Gd-Sm(-Zn)-Zr合金微观组织和力学性能的影响[J].材料热处理学报,2025,46(10):40-50.DOI:10.13289/j.issn.1009-6264.2024-0515.
基金信息:
国家自然科学基金(52371108,52201119); 龙门实验室前沿探索课题(LMQYTSKT014); 河南省科技研发计划联合基金(242103810056)