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Tailoring the textures and mechanical properties of AZ31 alloy sheets using asymmetric composite extrusion

机译:使用不对称复合挤压来定制AZ31合金薄板的织构和力学性能

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摘要

In the present study, an effective asymmetric composite extrusion (ACE) was used to produce AZ31 magnesium alloy sheets and compared with the composite extrusion (CE). The microstructures, textures and mechanical properties of AZ31 magnesium alloy sheets processed by CE and ACE processing at room temperature were investigated. The results demonstrated that the grains of the sheet fabricated by ACE processing were refined and the anisotropy could be improved in the tensile direction of ED, 45° and TD compared with the sheet fabricated by CE processing. The yield strength of the sheet processed by ACE was lower than that of the sheet processed by CE with the decrease of about 35 MPa in the TD tensile direction, and its ductility was increased from 26.1% to 31.4% in the 45° tensile direction at room temperature. The higher n-values and lower r-values were obtained for the sheet processed by ACE processing in three tensile directions. These results led to a good formability of the sheet fabricated by ACE at room temperature. The improved mechanical properties of AZ31 Mg alloy sheet were mainly attributed to texture weakening resulting from asymmetric shear strain during ACE processing.
机译:在本研究中,有效的不对称复合挤压(ACE)用于生产AZ31镁合金薄板,并与复合挤压(CE)进行比较。研究了室温下通过CE和ACE处理的AZ31镁合金板材的组织,织构和力学性能。结果表明,与通过CE加工制造的片材相比,通过ACE加工制造的片材的晶粒细化并且可以在ED,45°和TD的拉伸方向上改善各向异性。通过ACE处理的板材的屈服强度低于通过CE处理的板材的屈服强度,在TD拉伸方向上降低约35 MPa,并且其延展性在45°拉伸方向上从26.1%增加到31.4%。室内温度。通过ACE处理在三个拉伸方向上处理的片材,获得较高的n值和较低的r值。这些结果导致在室温下由ACE制造的片材具有良好的可成形性。 AZ31 Mg合金薄板力学性能的提高主要归因于ACE处理过程中不对称剪切应变导致的织构减弱。

著录项

  • 来源
    《Materials Science and Engineering》 |2016年第15期|606-615|共10页
  • 作者单位

    State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;

    State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China,Chongqing Academy of Science and Technology, Chongqing 401123, China;

    State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;

    Chongqing Chang-an Automobile Co., Ltd, Chongqing 400023, China;

    State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;

    State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;

    State Key Laboratory of Mechanical Transmissions, College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China,Chongqing Academy of Science and Technology, Chongqing 401123, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    AZ31 alloy sheet; Asymmetric composite extrusion; EBSD; Anisotropy; Texture weakening;

    机译:AZ31合金薄板;不对称复合材料挤出;EBSD;各向异性质地减弱;

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