杜兴蒿,魏成宾,武保林,王强,王大鹏,万刚,夏宇航,李万鹏

• 1:沈阳航空航天大学材料科学与工程学院

摘要(Abstract)：

对挤压态Mg-6.2 mass%Er合金在静态再结晶热处理过程中组织、织构的演变以及相应的力学行为进行了表征,分析了影响该合金塑性变形的微观机制。结果表明,挤压态Mg-6.2 mass%Er合金为部分再结晶的形变组织。在热处理过程中,再结晶程度与退火温度有关,在500℃下退火热处理获得完全再结晶组织。随着再结晶程度的提高,基面织构出现明显的弱化。合金室温拉伸塑性取决于织构的类型,基面织构的弱化导致合金室温塑性大幅度提高。

关键词(KeyWords)： 稀土镁合金;热挤压;热处理;力学性能;织构

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51171120)

作者(Author): 杜兴蒿,魏成宾,武保林,王强,王大鹏,万刚,夏宇航,李万鹏

DOI: 10.13289/j.issn.1009-6264.2015.11.006

参考文献(References)：

• [1]陈振华.变形镁合金[M].北京:化学工业出版社,2005.
• [2]Wonsiewicz B C,Backofen W A.Plasticity of magnesium crystals[J].Trans TMS-AIME,1967,239:1422-1431.
• [3]Chino Y,Kado M,Mabuchi M.Enhancement of tensile ductility and stretch formability of magnesium by addition of 0.2mass%Ce[J].Materials Science and Engineering A,2008,494:343-349.
• [4]Yan H,Chen R S,Han E H.Ductility and anisotropy of hot-rolled Mg-1/2%Zn-0.8%Gd alloy sheet at room temperature[J].Materials Science and Engineering A,2010,527:3317-3322.
• [5]Wu B L,Zhao Y H,Du X H,et al.Ductility enhancement of extruded magnesium via yttrium addition[J].Materials Science and Engineering A,2010,527:4334-4340.
• [6]Dreyer C E,Chiu W V,Wagoner R H,et al.Formability of a more randomly textured magnesium alloy sheet:Application of an improved warm sheet formability text[J].Journal of Materials Processing Technology,2010,210:37-47.
• [7]Wu B L,Wan G,Du X H,et al.The quasi-static mechanical properties of extruded binary Mg-Er alloys[J].Materials Science and Engineering A,2013,573:205-214.
• [8]Ball E A,Prangnell P B.Tensile-compressive yield asymmetries in high strength wrought magnesium alloys[J].Scripta Metallurgical et Materialia,1994,31:111-116.
• [9]Agnew S R,Senn J W,Horton J A.Mg sheet metal forming:lessons learned from deep drawing Li and Y solid-solution alloys[J].JOM,2006(5):62-69.
• [10]Barnett M R,Nave M D,Bettles C J.Deformation microstructures and textures of some cold rolled Mg alloys[J].Materials Science and Engineering A,2004,386:205-211.
• [11]Sandlbes S,Zaefferer S,Schestakow I,et al.On the role of non-basal deformation mechanisms for the ductility of Mg and Mg-Y alloys[J].Acta Materialia,2011,59:429-439.
• [12]Senn J W,Agnew S R.Texture randomization of Mg alloys containing rare earth elements[C]//Magnesium Technology 2008,Kaplan HI,ED.,TMS,Warrendale,PA,2008,153-159.
• [13]Mackenzie L F W,Pekduleryuz M O.The recrystallization and texture of magnesium-zinc-cerium alloys[J].Scripta Materialia,2008,59:665-668.
• [14]Stanford N,Barnett M R.The original of“rare earth”texture development in extruded Mg-based alloys and its effect on tensile ductility[J].Materials Science and Engineering A,2008,496:399-408.
• [15]Stanford N,Sha G,La Fontaine A,et al.Atom probe tomography of solute distribution in Mg-based alloys[J].Metallurgical and Materials Transactions A,2009,40:2480-2487.
• [16]Hadorn J P,Hantzsche K,Yi S,et al.Role of solute in the texture modification during hot deformation of Mg-rare earth alloys[J].Metallurgical and Materials Transactions A,2011,43:1347-1362.
• [17]Hadorn J P,Hantzsche K,Yi S,et al.Effect of solute and second-phase particles on the texture of Nd-containing Mg alloys[J].Metallurgical and Materials Transactions A,2012,44:1363-1375.
• [18]Agnew S R,Horton J A,Yoo M H.Transmission electron microscopy investigation ofdislocation in Mg and Mg-Li alloys[J].Metallurgical and Materials Transactions A,2002,33:851-859.
• [19]Sugamata M,Hanawa S,Kaneko J.Structures and mechanical properties of rapidly solidified Mg-Y based alloys[J].Materials Science and Engineering A,1997,226/228:861-866.
• [20]Barnett M R.Twinning and ductility of magnesium alloys:part I.“tension”twins[J].Materials Science and Engineering A,2007,464:1-7.
• [21]Sitdikov O,Kaibyshev R.Dynamic recrystallization in pure magnesium[J].Materials Transaction,2001,42:1928-1937.
• [22]Humpherys F J,Hatherly M.Recrystallization and Related Annealing Phenomena[M].Pergamon,1995.

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