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首页> 外文期刊>Applied Surface Science >Microstructure evolution and grain refinement of Ti-6A1-4V alloy by laser shock processing
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Microstructure evolution and grain refinement of Ti-6A1-4V alloy by laser shock processing

机译：Ti-6A1-4V合金激光冲击加工的组织演变和晶粒细化。

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摘要

Microstructure evolution and grain refinement of Ti-6A1-4V alloy after laser shock processing (LSP) are systematically investigated in this paper. Laser shock waves were induced by a Q-switched Nd:YAG laser system operated with a wave-length of 1064 nm and 10 ns pulse width. The microstructures of LSP samples were characterized by scanning electron microscopy (SEM) and transmission electron microscope (TEM). Present results indicate that the surface hardness of samples subjected to LSP impacts has significantly improved. Multidirectional twin intersections and dislocation movements lead to grain subdivision in alpha phase with ultra-high plastic deformation. High-density dislocations are found in beta phase. Multidirectional twin intersections and division of sub-grain boundaries play an important role in the grain refinement of Ti-6A1-4V alloy under LSP loading conditions. (C) 2015 Elsevier B.V. All rights reserved.
机译：本文系统地研究了Ti-6A1-4V合金在激光冲击处理（LSP）后的组织演变和晶粒细化。激光冲击波由波长为1064 nm，脉冲宽度为10 ns的Q开关Nd：YAG激光系统引起。通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）对LSP样品的微观结构进行了表征。目前的结果表明，受到LSP冲击的样品的表面硬度已大大提高。多向孪生相交和位错运动导致α相中的晶粒细分，并具有超高塑性变形。在β相中发现了高密度位错。在LSP加载条件下，多方向孪生相交和亚晶界的划分在Ti-6A1-4V合金晶粒细化中起着重要作用。 （C）2015 Elsevier B.V.保留所有权利。

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  • 来源
    《Applied Surface Science》 |2016年第15期|44-49|共6页
  • 作者

    Ren X. D.; Zhou W. F.; Liu F. F.; Ren Y. P.; Yuan S. Q.; Ren N. F.; Xu S. D.; Yang T.;

  • 作者单位

    Jiangsu Univ, Dept Mech Engn, Zhenjiang 212013, Peoples R China|Jiangsu Univ, Res Ctr Fluid Machinery Engn & Tech, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Dept Mech Engn, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Dept Mech Engn, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Dept Mech Engn, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Res Ctr Fluid Machinery Engn & Tech, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Dept Mech Engn, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Dept Mech Engn, Zhenjiang 212013, Peoples R China;

    Jiangsu Univ, Dept Mech Engn, Zhenjiang 212013, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Grain refinement; Twin; Dislocation; Surface; Ti-6A1-4V alloy;

    机译：晶粒细化;孪晶;位错;表面;Ti-6A1-4V合金;

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