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首页> 外文期刊>Journal of Materials Research >Dynamic recrystallization and microstructure evolution of a powder metallurgy nickel-based superalloy under hot working
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Dynamic recrystallization and microstructure evolution of a powder metallurgy nickel-based superalloy under hot working

机译：粉末冶金镍基高温合金的动态再结晶和组织演变

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摘要

The deformation behaviors (flow behavior, power dissipation, dynamic recrystallization, and microstructure evolution) of a typical powder metallurgy nickel-based superalloy were investigated in compression tests at temperatures range of 1020-1140 ℃ and strain rates range of 0.001-1.0 s~(-1) with the true strains of 0.3, 0.5, and 0.7, respectively. The efficiency of power dissipation can be shown by the power dissipation maps at different true strains. The results showed that true strain had a great effect on the power dissipation. Besides, the deformed microstructures were investigated. The processes of microstructure evolution at different deformation temperatures and strain rates are different. The continuous dynamic recrystallization takes place at the deformation condition of 1080 ℃/0.1 s~(-1). The fine and uniform dynamic recrystallized grains gradually replace the pre-existing grains with the increase of true strain. The discontinuous dynamic recrystallization takes place at the deformation condition of 1110 ℃/0.001 s~(-1). The fine dynamic recrystallized grains grow up and a part of new fine grains appear in the dynamic recrystallized grains because of the periodic dynamic recrystallization.
机译：在1020-1140℃的温度和0.001-1.0 s〜（应变率）的压缩试验中，研究了典型粉末冶金镍基高温合金的变形行为（流动行为，功率耗散，动态再结晶和微观组织演变）。 -1）的真实应变分别为0.3、0.5和0.7。功耗的效率可以通过不同真实应变下的功耗图来显示。结果表明，真实应变对功耗有很大影响。此外，还研究了变形的微观结构。在不同的变形温度和应变速率下，显微组织的演化过程是不同的。连续动态再结晶发生在1080℃/ 0.1 s〜（-1）的变形条件下。细小且均匀的动态再结晶晶粒随着真实应变的增加逐渐取代了先前存在的晶粒。在1110℃/ 0.001 s〜（-1）的变形条件下发生不连续的动态再结晶。动态细结晶晶粒长大，并且由于周期性动态重结晶，在动态结晶晶粒中出现了一部分新的细晶粒。

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  • 来源
    《Journal of Materials Research》 |2016年第14期|2164-2172|共9页
  • 作者

    Yanhui Liu; Yongquan Ning; Zekun Yao; Yuzhi Li; Jingli Zhang; Mingwang Fu;

  • 作者单位

    School of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China;

    School of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China;

    School of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China;

    School of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China;

    School of Materials Science & Engineering, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China;

    Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Horn, Kowloon, Hong Kong;

  • 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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