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Heterogeneous microstructure and voids dependence of tensile deformation in a selective laser melted AlSilOMg alloy

机译：在选择性激光熔化的肺泡合金中的抗拉变形的异质组织和空隙依赖性

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摘要

Microstructure and voids evolution of a selective laser melted (SLM) AlSilOMg alloy during tension were systematically investigated. The SLM AlSi10Mg sample is featured with a multi-level heterogeneous microstructure that is composed of melt pools (MPs), columnar Al grains and sub-cells. According to the Si morphologies and thermal history, the MP could be divided into three regions, including the fine structure zone (FSZ), remelted zone (RMZ) and heat-affected zone (HAZ), respectively. The Si segregation phenomenon on sub-cells boundaries is observed and may attributed to the constitutional supercooling. The tensile deformation behaviors of the vertical sample (V-sample) vary from the horizontal sample (H-sample) for that heterogeneous microstructure arises strain localization in V-sample. In addition, the voids have no obvious effect on the uniform plastic deformation, while they may affect the non-uniform deformation during tension. The combined effects of strain localization and void contribute to the earlier break in V-samples than in H-samples.
机译：系统地研究了在张力期间选择性激光熔化（SLM）Alsilomg合金的微观结构和空隙的演化。 SLM ALSI10MG样品具有多级异质组织，其由熔融池（MPS），柱状Al晶粒和子细胞组成。根据SI形态和热历史，MP可以分为三个区域，包括精细结构区（FSZ），再熔断区（RMZ）和热影响区域（HAZ）。观察到亚细胞边界上的Si分离现象，并且可能归因于构成过冷。垂直样品（V样品）的拉伸变形行为从水平样品（H样品）变化，用于该非均相微结构的水平样品（H样品）产生V样品中的应变定位。此外，空隙对均匀塑性变形没有明显影响，而它们可能影响张力期间的不均匀变形。应变定位和空隙的组合效应促进V样品中的早期突破，而不是H样本。

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  • 来源
    《Materials Science and Engineering》 |2020年第4期|140109.1-140109.11|共11页
  • 作者

    D.D. Ben; Y.R. Ma; H.J. Yang; L.X. Meng; X.H. Shao; H.Q. Liu; S.G. Wang; Q.Q. Duan; Z.F. Zhang;

  • 作者单位

    Laboratory of Fatigue and Fracture for Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 PR China Department of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 PR China;

    Laboratory of Fatigue and Fracture for Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 PR China Department of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 PR China;

    Laboratory of Fatigue and Fracture for Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 PR China Department of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 PR China;

    Laboratory of Fatigue and Fracture for Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 PR China Department of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 PR China;

    Department of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 PR China Shenyang National Laboratory for Materials Science Institute of Mewl Research Chinese Academy of Sciences Shenyang 110016 PR China;

    Laboratory of Fatigue and Fracture for Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 PR China Department of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 PR China;

    Shenyang National Laboratory for Materials Science Institute of Mewl Research Chinese Academy of Sciences Shenyang 110016 PR China;

    Laboratory of Fatigue and Fracture for Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 PR China;

    Laboratory of Fatigue and Fracture for Materials Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 PR China Department of Materials Science and Engineering University of Science and Technology of China Shenyang 110016 PR China;

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  • 正文语种 eng
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  • 关键词

    AlSi10Mg alloy; Selective laser melting; Heterogeneous microstructures; Strain localization; Voids;

    机译：Alsi10mg合金;选择性激光熔化;异质微观结构;应变局部化;空隙;

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