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首页> 外文期刊>Materials Science and Engineering >Effect of long period stacking ordered phase on the microstructure, texture and mechanical properties of extruded Mg-Y-Zn alloy
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Effect of long period stacking ordered phase on the microstructure, texture and mechanical properties of extruded Mg-Y-Zn alloy

机译：长期堆积有序相对挤压Mg-Y-Zn合金组织，组织和力学性能的影响

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摘要

The effect of long period stacking ordered (LPSO) phase on the microstructure, texture and mechanical properties of extruded Mg-Y-Zn alloys with compositions of Mg_(98.5)YiZn_(0.5),Mg_(95.5)Y_3Zn_(1.5) and Mg_(92.5)Y_5Zn_(2.5) (at%), was systematically investigated. The LPSO phases were aligned along the extrusion direction (ED) in the as-extruded Mg-Y-Zn alloys, and significantly enhanced the dynamic recrystalli-zation (DRX) process during the hot extrusion. With the increase of LPSO phase, the degree of DRX process of Mg alloy was more completed, the growth of the DRXed grains resulted in the grain coarsening, and the following phenomena were also observed that the conventional basal fiber texture was remarkably weakened, a novel texture component of <0 0 0 1 >//ED appeared in the Mg alloys with higher volume fraction of LPSO phase. The microhardness and tensile yield stress (TYS) of Mg-Y-Zn alloy was improved by LPSO phase, but the ductility was degraded. The strengthening effect of LPSO phase was dominant over that from the grain refinement and texture.
机译：长期堆积有序（LPSO）相对挤压Mg_（98.5）YiZn_（0.5），Mg_（95.5）Y_3Zn_（1.5）和Mg_（）的Mg-Y-Zn合金的组织，织构和力学性能的影响系统地研究了92.5）Y_5Zn_（2.5）（at％）。 LPSO相在挤压时的Mg-Y-Zn合金中沿挤压方向（ED）排列，并显着增强了热挤压过程中的动态重结晶（DRX）工艺。随着LPSO相的增加，镁合金的DRX加工程度更加完成，DRX晶粒的生长导致晶粒粗化，并且还观察到以下现象，传统的基础纤维织构明显减弱，这是一种新的<0 0 0 1> // ED的织构成分出现在具有较高LPSO相体积分数的Mg合金中。 LPSO相可改善Mg-Y-Zn合金的显微硬度和拉伸屈服应力（TYS），但延展性降低。 LPSO相的强化作用优于晶粒细化和织构的强化作用。

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  • 来源
    《Materials Science and Engineering》 |2013年第15期|177-183|共7页
  • 作者

    LB. Tong; X.H. Li; H.J. Zhang;

  • 作者单位

    State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;

    Institut fuer Metallkunde und Metallphysik, RWTH-Aachen University, D-52056 Aachen, Germany,Guangzhou Research Institute of Non-ferrous Metals, Guangzhou 570651, China;

    State Key Laboratory of Rare Earth Resources Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Mg-Y-Zn alloy; LPSO phase; microstructure; texture; mechanical properties;

    机译：Mg-Y-Zn合金;LPSO阶段;微观结构质地;机械性能;

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