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袁婷,江静华,王莉莎,马爱斌.大塑性变形制备超细晶铝锂合金的组织及力学性能研究进展[J].稀有金属材料与工程(英文),2019,48(1):55~62.[Yuan Ting,Jiang Jinghua,Wang Lisha and Ma Aibin.Overview on the microstructure and mechanical properties of ultrafine-grained Al-Li alloys produced by severe plastic deformation[J].Rare Metal Materials and Engineering,2019,48(1):55~62.]
Overview on the microstructure and mechanical properties of ultrafine-grained Al-Li alloys produced by severe plastic deformation
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Received:July 03, 2017  Revised:August 18, 2017
DOI:
Key words: Al-Li alloy  Severe plastic deformation (SPD)  Microstructure  Mechanical properties  Superplasticity
Foundation item:中央高校基本科研业务费项目(HHU2016B10314);江苏省青蓝工程和六大人才高峰项目(2014-XCL-023);宿迁市科技公共服务平台项目 (M201614)
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Yuan Ting,Jiang Jinghua,Wang Lisha and Ma Aibin  
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Abstract:
      In recent years, fabrication of bulk ultrafine-grained (UFG) Al-Li alloys via severe plastic deformation (SPD) techniques has been investigated to improve properties for expanding its applications as structural products. This review reveals microstructure and mechanical properties of Al-Li alloys produced by SPD techniques. It focuses on the microstructure evolution during SPD, with the influence of internal and external factors. The strengthening mechanism of Al-Li alloys mainly based on precipitation hardening is presented. It is demonstrated that UFG Al-Li may attain enhanced strength with relatively good ductility via grain refinement and multiple precipitates. Special attention is given to the superplasticity of UFG Al-Li alloys, especially to the high strain rate superplasticity (HSR SP). It suggests that UFG Al-Mg-Li alloy produced by SPD, particularly by equal-channel angular pressing (ECAP), is a promising candidate material for use in superplastic forming operations.