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首页> 外文期刊>Materials Science and Engineering >Microstructure evolution of different loading zones during TA15 alloy multi-cycle isothermal local forging
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Microstructure evolution of different loading zones during TA15 alloy multi-cycle isothermal local forging

机译：TA15合金多周期等温局部锻造过程中不同加载区的组织演变。

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摘要

The microstructure evolution of the TA15 Ti-alloy in different loading zones under two kinds of multicycle isothermal local forging (multi-cycle local near-β forging and multi-cycle conventional forging combined with near-β heat treatment) was investigated and the mechanical properties predicted. Under the first processing route, a microstructure with small grain size was obtained with a significant difference in morphology and composition between the first and second loading zones. An equiaxial microstructure with larger size and more α-phase was obtained in the first loading zone. In the second loading zone when cooled by water after multiple forging cycles and a tri-modal microstructure (finely interlaced and disordered lamellar α, transformed β matrix, and a few equiaxed α) was obtained. The second loading zone possesses excellent room and high temperature mechanical properties. Under the second processing route, the relatively large bimodal microstructures in both loading zones are almost identical. When treated using a vacuum annealing furnace after forging, a coarse clustered lamellar secondary α-phase appeared, which has poor mechanical properties.
机译：研究了两种多循环等温局部锻造（多循环局部近β锻造和多循环常规锻造结合近β热处理）下TA15 Ti合金在不同载荷区的组织演变，并研究了力学性能。预料到的。在第一加工路线下，获得了具有小晶粒尺寸的微观结构，其在第一和第二加载区之间的形态和组成存在显着差异。在第一加载区中获得了具有更大尺寸和更多α相的等轴显微组织。在第二次加载区中，经过多次锻造循环并经水冷却后，获得了三峰微观结构（精细交错且无序的层状α，转化的β基体和少量等轴α）。第二装载区具有出色的室温和高温机械性能。在第二条加工路线下，两个装载区中相对较大的双峰微结构几乎相同。锻造后使用真空退火炉进行处理时，会出现粗大的簇状层状次级α相，其机械性能较差。

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  • 来源
    《Materials Science and Engineering》 |2011年第15期|p.5112-5121|共10页
  • 作者

    Zhichao Sun; Lei Liu He Yang;

  • 作者单位

    State Key Lab of Solidification Processing, Department of Materials Science and Engineering, Northwestern Polytechnical University, P.O. Box 542, Xi'an, Shaanxi 710072, PR China;

    State Key Lab of Solidification Processing, Department of Materials Science and Engineering, Northwestern Polytechnical University, P.O. Box 542, Xi'an, Shaanxi 710072, PR China;

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  • 正文语种 eng
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  • 关键词

    TA15 Ti-alloy; multiple local forging; near-beta; microstructure; mechanical property;

    机译：TA15钛合金;多次本地锻造;接近beta微观结构机械性能;

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