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IN783低膨胀高温合金的热变形行为和组织演变
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1.贵州安大航空锻造有限责任公司;2.烟台大学 精准材料高等研究院

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中图分类号:

TG132.3

基金项目:

山东省高等学校青年创新团队计划资助项目(2022KJ272);山东省泰山学者工程专项经费资助项目(2021,2022);山东省自然科学基金面上项目(ZR2022ME067)通信作者:周鑫, 教授, 博士; 电话:0535-6902637; E-mail: zhouxin@ytu.edu.cn


Hot Deformation Behavior and Microstructure Evolution of IN783 Low-expansion Superalloy
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Yantai University

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Project (2022KJ272) supported by the Youth Innovation team Project of Higher Education Institutions in Shandong Province; Project (2021, 2022) supported by Taishan Scholars Program of Shandong Province; Project (ZR2022ME067) supported by the Natural Science Foundation of Shandong Province

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    摘要:

    本文通过热压缩试验研究了IN783低膨胀高温合金在温度为1000-1120℃、应变速率为0.01-10 S-1条件下的热变形行为,并采用电子背散射衍射( EBSD)研究了不同变形参数下合金的组织演变规律。结果表明,IN783合金的峰值应力随着温度的升高和应变速率的减小而显著降低。基于 Arrhenius 方程和 Zener-Hollomon 参数模型,建立了该合金的本构方程,可以很好地描述热变形过程中峰值应力与变形温度和应变速率的关系。基于动态材料模型绘制了IN783合金的热加工图,并根据热加工图和微观组织分析,确定IN783镍基高温合金的失稳区为:变形温度1095℃-1120℃、应变速率100.39814-101 S-1此外,在高温低速率条件下(1060-1120℃、0.01 S-1),尽管合金具有较高的功率耗散值,但会出现混晶组织和晶粒粗化现象,也不适合作为IN783合金的热加工区间。

    Abstract:

    In this paper, the hot deformation behavior of IN783 low-expansion superalloy was investigated through hot compression experiments at the deformation temperatures of 1000-1120 ℃ and strain rates of 0.01-10 S-1. The microstructure evolution of the alloy under different deformation conditions was studied using electron backscatter diffraction (EBSD). The results indicate that the peak stress of IN783 alloy significantly decreases with the increase of deformation temperature and the decrease of strain rates. Combined with Arrhenius equation and Zener Hollomon parameter model, the constitutive equation of the alloy was established, which can well describe the relationship between peak stress, deformation temperature and strain rate during hot deformation of IN783 alloy. The hot working diagram of IN783 alloy was drawn based on the dynamic material model. According to the hot working diagram and the microstructure observation, the instability zone of IN783 superalloy was determined as: deformation temperature of 1095 ℃ - 1120 ℃, strain rate of 100.39814-101 S-1. In addition, under the condition of high temperature and low strain rates (1060-1120 ℃, 0.01 S-1), mixed crystal and grain coarsening would occur, which makes it not suitable for the hot working of IN783 alloy although the alloy has high power dissipation coefficient in those parameters.

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苏海,王晨,罗通,黄海亮,张华,张尚洲,江亮,周鑫. IN783低膨胀高温合金的热变形行为和组织演变[J].稀有金属材料与工程,,().[Su Hai, Wang Chen, Luo Tong, Huang Hailiang, Zhang Hua, Zhang Shangzhou, Jiang Liang, Zhou Xin. Hot Deformation Behavior and Microstructure Evolution of IN783 Low-expansion Superalloy[J]. Rare Metal Materials and Engineering,,():].

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  • 收稿日期:2023-05-15
  • 最后修改日期:2023-07-26
  • 录用日期:2023-07-28
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