付三玲,李全安,张清

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

摘要(Abstract)：

采用高分辨透射电镜和选区电子衍射谱研究了时效态Mg-12Gd-2Y-1Sm-0.5Zr(质量分数,%)合金经室温及200℃、250℃和300℃拉伸断裂后恢复至室温过程中的显微组织演变。结果表明:该合金经室温拉伸后合金的第二相结构未发生明显变化;在经过200℃和250℃拉伸后,合金中依然存在大量β′相,β′相可有效阻碍位错运动,强化合金高温力学性能。除此之外,在200℃拉伸后,还出现了长周期有序结构相(LPSO相),LPSO相具有优异的高温热稳定性和塑性变形能力,可有效提高合金的性能;当拉伸温度进一步提高到300℃时,基体软化加剧,强化相β′相减少,合金抗拉强度下降。

关键词(KeyWords)： 高温拉伸;Mg-Gd-Y-Sm-Zr合金;组织;透射电镜

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51171059,51571084);; 河南科技大学博士科研启动基金

作者(Author): 付三玲,李全安,张清

DOI: 10.13289/j.issn.1009-6264.2019-0312

参考文献(References)：

• [1] 李克杰,李全安.Sm和Sb对时效态Mg-12Gd-2Y-0.5Zr合金组织与力学性能的影响[J].材料热处理学报,2011,32(5):110-115.LI Ke-jie,LI Quan-an.Effects of addition of Sm and Sb on microstructure and mechanical properties of aged Mg-12Gd-2Y-0.5Zr alloy[J].Transactions of Materials and Heat Treatment,2011,32(5):110-115.
• [2] 张新明,陈健美,邓运来,等.Mg-Gd-Y-(Mn,Zr)合金的显微组织和力学性能[J].中国有色金属学报,2006,16(2):219-227.ZHANG Xin-ming,CHEN Jian-mei,DENG Yun-lai,et al.Microstructures and mechanical properties of Mg-Gd-Y-(Mn,Zr) magnesium alloys[J].The Chinese Journal of Nonferrous Metals,2006,16(2):219-227.
• [3] 张国栋,李兴刚,马鸣龙,等.Al对铸态Mg-Gd-Y-Nd-Zr合金组织及力学性能的影响[J].特种铸造及有色合金,2014,34(3):322-325.ZHANG Guo-dong,LI Xing-gang,MA Ming-long,et al.Influences of Al on the microstructures and mechanical properties of as-cast Mg-Gd-Y-Nd-Zr magnesium alloy[J].Special Casting and Nonferrous Alloys,2014,34(3):322-325.
• [4] 王振东,房灿峰,孟令刚,等.高强Mg-Gd-Y-Zn-Zr合金的微观组织和力学性能[J].中国有色金属学报,2012,22(1):1-6.WANG Zhen-dong,FANG Can-feng,MENG Ling-gang,et al.Microstructures and mechanical properties of high-strength Mg-Gd-Y-Zn-Zr alloy[J].The Chinese Journal of Nonferrous Metals,2012,22(1):1-6.
• [5] 薛勇,张治民,杨勇彪.Mg-11.21Gd-2.26Y-0.44Zr稀土镁合金热变形行为[J].塑性工程学报,2011,18(6):58-63.XUE Yong,ZHANG Zhi-min,YANG Yong-biao.Deformation behavior of Mg-11.21Gd-2.26Y-0.44Zr alloy at elevated temperatures[J].Journal of Plasticity Engineering,2011,18(6):58-63.
• [6] 韩修柱,徐文臣,单德彬.稀土增强型Mg-10Gd-8Y-1.5Nd-0.5Zr合金挤压工艺研究[J].材料科学与工艺,2013,21(4):100-104.HAN Xiu-zhu,XU Wen-chen,SHAN De-bin.Study on extrusion process of Mg-10Gd-8Y-1.5Nd-0.5Zr alloy intensified with rare earth elements[J].Materials Science and Technology,2013,21(4):100-104.
• [7] 汪欢.Mg-10Gd-3Y-0.5Zr(wt.%)镁合金高温拉伸、压缩及压入蠕变行为研究[D].上海:上海交通大学,2016.WANG Huan.Elevated-temperature tension,compression and impression creep behavior of Mg-10Gd-3Y-0.5Zr(wt.%) alloy[D].Shanghai:Shanghai Jiao Tong University,2016.
• [8] 张新明,陈健美,邓运来,等.Mg-Gd-Y-Zr耐热镁合金的压缩变形行为[J].中国有色金属学报,2005,15(12):1925-1932.ZHANG Xin-ming,CHEN Jian-mei,DENG Yun-lai,et al.Deformation behavior of Mg-Gd-Y-Zr heat resistant magnesium alloy during hot-compression[J].The Chinese Journal of Nonferrous Metals,2005,15(12):1925-1932.
• [9] 赵娟,李建平,郭永春,等.相图计算在Mg-9Gd-3Y-0.6Zn-0.5Zr新型变形镁合金热处理工艺设计中的应用[J].铸造技术,2007,28(4):531-534.ZHAO Juan,LI Jian-ping,GUO Yong-chun,et al.Application of calphad to neotype deforming Mg-9Gd-3Y-0.6Zn-0.5Zr heat-treat process design[J].Foundry Technology,2007,28(4):531-534.
• [10] 刘俊,陈明安,马聪聪,等.第二相粒子在Mg-Gd-Y-Nd-Zr合金局部腐蚀中的作用机制[J].中国有色金属学报,2013(1):15-21.LIU Jun,CHEN Ming-an,MA Cong-cong,et al.Effect of second phase particles on localized corrosion of Mg-Gd-Y-Nd-Zr alloy[J].The Chinese Journal of Nonferrous Metals,2013(1):15-21.
• [11] 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.
• [12] 徐春杰,田军,陈利萍,等.Mg-RE合金LPSO结构的析出与控制研究进展[J].兵器材料科学与工程,2015,38(4):132-138.XU Chun-jie,TIAN Jun,CHEN Li-ping,et al.Research progress in precipitation and control of LPSO structure in Mg-RE alloys[J].Ordnance Material Science and Engineering,2015,38(4):132-138.
• [13] Cao L J,Wu Y J,Peng L M,et al.Microstructure and tribological behavior of Mg-Gd-Zn-Zr alloy with LPSO structure[J].Transactions of Nonferrous Metals Society of China,2014,24(12):3785-3791.
• [14] Kishida K,Yokobayashi H,Inui H,et al.The crystal structure of the LPSO phase of the 14H type in the Mg-Al-Gd alloy system[J].Intermetallics,2012,31(31):55-64.
• [15] Zhang X B,Wang Q,Chen F B,et al.Relation between LPSO structure and biocorrosion behavior of biodegradable GZ51K alloy[J].Materials Letters,2015,138:212-215.
• [16] 李扬欣.稀土镁合金中的长周期堆垛有序结构相及其对组织与性能的影响[D].上海:上海交通大学,2014.LI Yang-xin.The effect of long period stacking ordered phases on mechanical properties in magnesium alloys containing rare earth dements[D].Shanghai:Shanghai Jiao Tong University,2014.
• [17] 曾小勤,吴玉娟,彭立明,等.Mg-Gd-Zn-Zr合金中的LPSO结构和时效相[J].金属学报,2010,46(9):1041-1046.ZENG Xiao-qin,WU Yu-juan,PENG Li-ming,et al.LPSO structure and aging phases in Mg-Gd-Zn-Zr alloy[J].Acta Metallurgica Sinica,2010,46(9):1041-1046.
• [18] 刘欢,薛烽,白晶.长周期堆垛有序结构强化Mg-Zn-Y合金的组织与性能[J].东南大学学报(自然科学版),2012,42(3):478-482.LIU Huan,XUE Feng,BAI Jing.Microstructure and properties of Mg-Zn-Y alloys with long period stacking ordered structure[J].Journal of Southeast University(Natural Science Edition),2012,42(3):478-482.
• [19] Hagihara K,Kinoshita A,Sngino Y,et al.Effect of Long-period stacking ordered phase on mechanical properties of Mg97Zn1Y2 extruded alloy[J].Acta Materialia,2010,58(19):6282-6293.
• [20] Shao X H,Yang Z Q,Ma X L.Strengthening and toughening mechanisms in Mg-Zn-Y alloy with a long period stacking ordered structure[J].Acta Materialia,2010,58(14):4760-4771.

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