徐春杰,郭学锋,刘礼,张忠明

• 1:西安理工大学材料科学与工程学院
• 2:西安理工大学材料科学与工程学院
• 3:西安理工大学材料科学与工程学院
• 4:西安理工大学材料科学与工程学院 陕西西安710048

摘要(Abstract)：

将快速凝固Mg92.5Zn6.4Y1.1合金薄带在330℃往复挤压2道次和4道次,然后再正挤压制成10mm的棒材。用OM、TEM、XRD及DTA研究了往复挤压对材料微观结构的影响。研究表明,往复挤压有利于合金薄带的焊合,获得高致密度的棒材。往复挤压2道次,棒材相组成为α-Mg和Mg3YZn6准晶(I);4道次相组成为α-Mg和原始的I相以及析出的I相和MgZn。往复挤压道次增加,I相得到细化,并有纳米相脱溶析出。

关键词(KeyWords)： 往复挤压;快速凝固;镁合金;准晶

Abstract:

Keywords:

基金项目(Foundation): 陕西省自然科学研究计划项目(2002E110,2003E111);; 陕西省教育厅产业化培育项目(04JC24);; 西安市科技攻关计划-工业攻关项目(GG06062);; 西安理工大学科学研究计划(X类)项目(101-210602)

作者(Author): 徐春杰,郭学锋,刘礼,张忠明

参考文献(References)：

• [1]Suzuki M,Sato H,Maruyama K,et al.Creep behavior and deformation microstructure of Mg-Y alloys at 550K[J].Materials Science Engineering,1998,A252:248-255.
• [2]Bae D H,Lee M H,Kim K T,et al.Application of quasicrystalline particles as a strengthening phase in Mg-Zn-Y alloys[J].Journal of Alloys andCompounds,2002,342:445-450.
• [3]GUO Xue-feng,Jacob Kinstler,Lilia Glazman,et al.High strength Mg-Zn-Y-Ce-Zr alloy bars prepared by RS and extrusion technology[J].MaterialsScience Forum,2005,488-489:495-498.
• [4]Shihwei Lee,Hsiaoyun Wang,CHEN Yu-liang,et al.An Mg-Al-Zn alloy with very high specific strength and superior high strain rate superplasticityprocessed by reciprocating extrusion[J].Advanced Engineering Materials,2004,6(12):948-952.
• [5]刘礼,徐春杰,张忠明,等.往复挤压L2纯铝的组织与性能[J].材料热处理学报,2006,27(3):47-50.LIU Li,XU Chun-jie,ZHANG Zhong-ming,et al.Microstructure and mechanical properties of reciprocating extruded pure Al L2[J].Trans Mater HeatTreat,2006,27(3):47-50.
• [6]徐春杰,郭学锋,张忠明,等.热挤压快速凝固AZ91D镁合金棒材的组织与性能[J].兵器材料科学与工程,2006,29(1):9-13.XU Chun-jie,GUO Xue-feng,ZHANG Zhong-ming,et al.Microstructure and mechanical properties of extruded solid materials from rapidly solidified AZ91Dalloy ribbons[J].Ordnance Material Science and Engineering,2006,29(1):9-13.
• [7]Singh Alok,Watanabe M,Kato A,et al.Formation of icosahedral-hexagonal H phase nano-composites in Mg-Zn-Y alloys[J].Scripta Materialia,2004,51:955-960.
• [8]LUO Zhi-ping,Hashimoto H.High-resolution electron microscopy observation of a new crystalline approximant W of Mg-Zn-Y icosahedral quasicrystal[J].Micron,2000,31(5):487-492.
• [9]Kim I J,Bae D H,Kim D H.Precipitates in a Mg-Zn-Y alloy reinforced by an icosahedral quasicrystalline phase[J].Materials Science and Engineering A,2003,359:313-318.
• [10]Alok Singh,Nakamura M,Watanabe M,et al.Quasicrystal strengthened Mg-Zn-Y alloys by extrusion[J].Scripta Materialia,2003,49:417-422.
• [11]YUAN Shi-ying,Jienwei Yeh,Chunhuei Tsau.Improved microstructure and mechanical properties of 2024 Aluminum alloy produced by a reciprocatingextrusion method[J].Materials Transactions JIM,1999,40(3):233-241.

文章评论(Comment)：