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首页> 外文期刊>Materials Science and Engineering >Evolution of flow stress and microstructure during isothermal compression of Waspaloy
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Evolution of flow stress and microstructure during isothermal compression of Waspaloy

机译：Waspaloy等温压缩过程中流动应力和微观结构的演变

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摘要

The evolution of the flow stress and microstructure for Waspaloy was studied in the 950-1140 ℃ temperature range under constant true strain rate conditions of 0.001-1 s~(-1) up to a true strain of 0.83 using isothermal hot compression testing. The impact of friction at the sample/anvil interface and adiabatic heating during deformation on the flow stress evolution was also examined. Mathematical models relating the flow stress to the deformation temperature and strain rate were derived using a power-law relationship. The strain rate sensitivity and the activation energy for hot deformation of Waspaloy were found to be considerably different for deformation in the subsolvus and supersolvus temperature ranges. According to the microstructural investigations, at 950 ℃ dynamic recovery (DRV) was the main softening mechanism. By contrast, dynamic recrystallization (DRX), partial or complete, occurred at temperatures above 950 ℃ and resulted in flow softening.
机译：利用等温热压缩试验研究了在950-1140℃温度范围内，在恒定的真实应变速率为0.001-1 s〜（-1）到真实应变为0.83的条件下，Waspalloy的流动应力和微观组织的演变。还检查了样品/砧界面处的摩擦以及变形过程中的绝热加热对流动应力演变的影响。使用幂律关系推导了将流动应力与变形温度和应变速率相关联的数学模型。发现Waspaloy的热变形的应变速率敏感性和活化能在亚固溶和超固溶温度范围内有很大的不同。根据显微组织研究，在950℃时动态恢复（DRV）是主要的软化机理。相反，在950℃以上的温度下发生了部分或全部的动态重结晶（DRX），导致流动软化。

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  • 来源
    《Materials Science and Engineering》 |2014年第6期|497-510|共14页
  • 作者

    A. Chamanfar; M. Jahazi; J. Gholipour; P. Wanjara; S. Yue;

  • 作者单位

    Department of Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec, Canada H3A 0C5,Departement de Genie Mecanique, Ecole de Technologie Superieure, 1100 rue Notre-Dame Ouest, Montreal, Quebec, Canada H3C 1K3;

    Departement de Genie Mecanique, Ecole de Technologie Superieure, 1100 rue Notre-Dame Ouest, Montreal, Quebec, Canada H3C 1K3;

    National Research Council Canada, Aerospace, 5145 Decelles Avenue, Montreal, Quebec, Canada H3T 2B2;

    National Research Council Canada, Aerospace, 5145 Decelles Avenue, Montreal, Quebec, Canada H3T 2B2;

    Department of Materials Engineering, McGill University, 3610 University Street, Montreal, Quebec, Canada H3A 0C5;

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  • 正文语种 eng
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  • 关键词

    Waspaloy; Isothermal hot compression; Friction; Adiabatic heating; Flow stress; Microstructure;

    机译：Waspaloy;等温热压缩;摩擦;绝热加热;流应力微观结构;

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