林丹,王磊,孟凡强,崔建忠,乐启炽

• 1:东北大学材料各向异性与织构教育部重点实验室
• 2:东北大学材料电磁过程研究教育部重点实验室

摘要(Abstract)：

研究了添加稀土Y 1wt%和Nd 1wt%对挤压态ZK60合金组织及拉伸性能的影响。结果表明,稀土的添加可有效细化ZK60镁合金的挤压态组织,Y、Nd复合添加的细化效果更为显著,平均晶粒直径为2~3μm;稀土Nd的添加使ZK60合金的析出相尺寸增大,复合添加稀土Y、Nd后,ZK60合金中析出相数量增多、尺寸减小且分布均匀;Y、Nd的复合添加可使ZK60合金的抗拉强度与屈服强度分别提高8.4%与31.2%,这归因于复合添加Y、Nd形成的细晶强化、固溶强化及析出相强化的综合影响。

关键词(KeyWords)： ZK60合金;Y;Nd;挤压;显微组织;拉伸性能

Abstract:

Keywords:

基金项目(Foundation): 国家“973”课题(2007CB613702,5133001003-3);; 高等学校学科创新引智计划资助(B07015)

作者(Author): 林丹,王磊,孟凡强,崔建忠,乐启炽

DOI: 10.13289/j.issn.1009-6264.2010.01.010

参考文献(References)：

• [1]Decker R F.The renaissance in magnesium[J].Advanced Materials&Processes,1998,154(3):31-33.
• [2]陈振华,严红革,陈吉华,等.镁合金[M].北京:化学工业出版社,2004.
• [3]Mordike B L,Ebert T.Magnesium:Properties-applications-potential[J].Materials Science and Engineering A,2001,302(1):37-45.
• [4]ASMInternational.Magnesium and Magnesium Alloy[M].Ohio:Metal Park,1999.
• [5]黎文献.镁及镁合金[M].长沙:中南大学出版社,2005.
• [6]张继东,李亚国,张少卿,等.钇对MB25镁合金组织及强度的影响[J].中国稀土学报,1989,7(3):55-58.ZHANG Ji-dong,LI Ya-guo,ZHANG Shao-qing,et al.Studies on the microstructure and grain boundaries of magnesium alloys MB25 in differentcontents of Y[J].Journal of the Chinese Rare Earth Society,1989,7(3):55-58.
• [7]余琨.稀土变形镁合金组织性能及加工工艺研究[D].长沙:中南大学,2002.
• [8]LUO Z P,SONG D Y,ZHANG S Q.Strengthening effects of rare earths on wrought Mg-Zn-Zr-RE alloys[J].Journal of Alloys and Compounds,1995,230(2):109-114.
• [9]MA C J,LIUMP,WUG H,et al.Tensile properties of extruded ZK60-RE alloys[J].Mater Sci Eng A,2003,349(1-2):207-212.
• [10]Janot C.Quasicrystal[M].Oxford:Clarondon Press,1994.
• [11]XUD K,LIUL,XUY B,et al.The effect of precipitates on the mechanical properties of ZK60-Y alloy[J].Materials Science and Engineering A,2006,420(1-2):322-332.
• [12]LUO Z P,ZHANG S Q,TANG Y L,et al.Quasicrystals in as-cast Mg-Zn-RE alloys[J].Scripta Metallurgica et Materialia,1993,28(12):1513-1518.
• [13]LUO Z P,ZHANG S Q,TANG Y L,et al.On the stable quasicrystals in slowly cooled Mg-Zn-Y alloys[J].Scripta Metallurgica et Materialia,1995,32(9):1411-1416.
• [14]LI Q,WANG Q D,WANG Y X,et al.Effect of Nd and Y addition on microstructure and mechanical properties of as-cast Mg-Zn-Zr alloy[J].Journalof Alloys and Compounds,2007,427(1-2):115-123.
• [15]王磊.材料的力学性能[M].沈阳:东北大学出版社,2007.
• [16]刘楚明,朱秀荣,周海涛.镁合金相图集[M].长沙:中南大学出版社,2006.
• [17]ZHANG Y,ZENG X,LIU,et al.Effects of yttrium on microstructure and mechanical properties of hot-extruded Mg-Zn-Y-Zr alloys[J].MaterialsScience and Engineering A,2004,373(1-2):320-327.
• [18]ZHOUHT,ZHANG Z D,LIUC M,et al.Effect of Nd and Y on the microstructure and mechanical properties of ZK60 alloy[J].Materials Scienceand Engineering A,2007,445-446(1-2):1-6.

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