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首页> 外文期刊>Journal of Materials Research >Effects of Ag variations on dynamic recrystallization, texture, and mechanical properties of ultrafine-grained Mg-3Al-1Zn alloys
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Effects of Ag variations on dynamic recrystallization, texture, and mechanical properties of ultrafine-grained Mg-3Al-1Zn alloys

机译：Ag变化对Mg-3Al-1Zn超细晶粒合金动态再结晶，织构和力学性能的影响

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摘要

In this study, the effects of Ag variations on dynamic recrystallization (DRX), texture, and mechanical properties of ultrafine-grained Mg-3Al-1Zn alloys are investigated. The results suggest that Ag segregation and Al-Zn-Ag clusters form in the Mg matrix with Ag addition less than 1 wt%, which retard DRX and the growth of the DRXed grains. The resulting grain size decreases from 513 to 316 nm. As the Ag addition increases to 2 wt%, the Mg_(54)Ag_(17) phase precipitates along the grain boundary, which plays an important role in restricting DRXed grain growth via grain boundary pinning effect. The resulting grain size is 375 nm with a bimodal grain size distribution. The extrusion texture of the investigated alloys is in fairly scattered orientation distribution. The weak basal texture and ultrafine grain size lead to the high yield asymmetry ratio. The Ag-containing extruded alloys exhibit an increase in the tensile and compressive properties. The strengthening mechanisms due to grain refinement, dislocations, solid solution, precipitates, solute clusters, and segregation are discussed.
机译：在这项研究中，研究了Ag的变化对超细晶粒Mg-3Al-1Zn合金的动态再结晶（DRX），织构和力学性能的影响。结果表明，Mg基体中形成了Ag偏析和Al-Zn-Ag团簇，且Ag添加量小于1 wt％，这阻碍了DRX和DRXed晶粒的生长。所得的晶粒尺寸从513 nm减小到316 nm。随着Ag的添加量增加到2 wt％，Mg_（54）Ag_（17）相沿晶界析出，这在通过晶界钉扎效应限制DRXd晶粒生长方面起着重要作用。所得晶粒尺寸为375 nm，具有双峰晶粒尺寸分布。被研究合金的挤压织构处于相当分散的取向分布。较弱的基础组织和超细晶粒导致高的不对称率。含银的挤压合金表现出拉伸和压缩性能的提高。讨论了由于晶粒细化，位错，固溶，沉淀，溶质团簇和偏析引起的强化机理。

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  • 来源
    《Journal of Materials Research》 |2016年第21期|3360-3371|共12页
  • 作者

    Jie Feng; Hongfei Sun; Xuewen Li; Han Wang; Wenbin Fang;

  • 作者单位

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;

    School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China, and School of Materials Science and Engineering, Harbin University of Science and Technology, Harbin 150080, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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