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首页> 外文期刊>Materials Science and Engineering >Microstructure and mechanical properties of an MP159 alloy processed by torsional deformation and subsequent annealing
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Microstructure and mechanical properties of an MP159 alloy processed by torsional deformation and subsequent annealing

机译：通过扭转变形和随后的退火处理MP159合金的微观结构和机械性能

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摘要

MP159 alloy is a NiCoCr-based material, with a single-phase face centered cubic structure in the solid solution state. In this paper, the evolutions of the microstructure and mechanical properties of the MP159 alloy after torsional deformation and subsequently annealing treatment were systematically investigated. Detailed micro-structural characterization and mechanical properties testing indicate that the torsional deformation introduces gradient structure and gradient hardness distribution along the radial direction in the alloy, leading to the increase of the strength while retaining a decent amount of the ductility. The formed gradient structure includes gradient grain size, gradient dislocation substructures and density. Subsequently annealing treatment only leads to the annihilation of part dislocations and does not change the gradient structure significantly, but introduces nano-sized γ' phase inside the matrix. The combination of the gradient structure and nano-sized γ' phase leads to the further increment of the strength.
机译：MP159合金是一种基于尼亚克的材料，在固体溶液状态下具有单相面中心的立方结构。本文在系统地研究了扭转变形和随后退火处理后MP159合金的微观结构和力学性能的演变。详细的微结构表征和机械性能测试表明，扭转变形沿合金中的径向引入梯度结构和梯度硬度分布，导致强度的增加，同时保持不良的延展性。形成的梯度结构包括梯度粒度，梯度位错子结构和密度。随后的退火处理仅导致部分脱位的湮灭，并且不会显着改变梯度结构，而是在基质内引入纳米大小的γ'相。梯度结构和纳米尺寸γ'相的组合导致强度的进一步增加。

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  • 来源
    《Materials Science and Engineering》 |2021年第20期|140676.1-140676.8|共8页
  • 作者

    Ji Gu; Lin Guo; Bin Gan; Zhongnan Bi; Min Song;

  • 作者单位

    State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 PR China;

    State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 PR China;

    Beijing Key Laboratory of Advanced High Temperature Materials Central Iron and Steel Research Institute Beijing 100081 PR China;

    Beijing Key Laboratory of Advanced High Temperature Materials Central Iron and Steel Research Institute Beijing 100081 PR China;

    State Key Laboratory of Powder Metallurgy Central South University Changsha 410083 PR China;

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

    MP159 alloy; Torsion; Gradient microstructure; Mechanical properties;

    机译：MP159合金;扭转;梯度微观结构;机械性能;

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