Effect of processing parameters on flow behaviors and microstructure during high temperature deformation of GH4586 superalloy

GH4586 合金高温变形过程中工艺参数对流动行为和微观组织的影响

Abstract

The apparent activation energy for deformation (Q) and strain rate sensitivity (m) of GH4586 superalloy are calculated and the variation trend is reasonably explained by the microstructure observations. Constitutive modelling of this superalloy is established and the processing maps at different strains are constructed. The results show that the Q value is in the range of 751.22–878.29 kJ/mol. At a temperature of 1060 °C, strain rate of 0.001 s−1, and strain of 0.65, the m value of GH4586 superalloy reaches a maximum of 0.42. The optimal processing parameter of GH4586 superalloy is at a deformation temperature of 1050 °C and a strain rate of 0.001 s−1. The domains of flow instability notably expand with increasing strain during high temperature deformation of GH4586 superalloy.

摘要

本文计算了 GH4586 高温合金的表观变形激活能(Q)和应变速率敏感性指数(m), 并基于微观组织观察分析了其变化的原因. 本文还建立了 GH4586 高温合金的本构模型和不同应变下的热加工图. 研究结果表明: 表观变形激活能值(Q)是 751.22~878.29 kJ/mol. 当变形温度为 1060 °C、 应变速率 为 0.001 s−1、 应变为 0.65 时, GH4586 高温合金的应变速率敏感性指数(m)达到最大值 0.42. 该合金的最优加工参数是变形温度 1050 °C 和应变速率 0.001 s−1. GH4586 合金高温变形过程中的非稳定区域随着应变的增加而显著增加.

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Affiliations

Authors

Contributions

LUO Jiao provided the overarching research goals and edited the draft of manuscript. LI Xiang-yang conducted the literature review and wrote the first draft of the manuscript. LI Cong analyzed the calculated results. LI Miao-quan provided the concept. All authors revised the final version.

Corresponding author

Correspondence to Jiao Luo 罗皎.

Ethics declarations

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Additional information

Foundation item: Project(2020JC-17) supported by the Science Fund for Distinguished Young Scholars from Shaanxi Province, China; Project(51705425) supported by the National Natural Science Foundation of China; Project(2019-QZ-04) supported by the Research Fund of the State Key Laboratory of Solidification Processing (NWPU), China; Projects(3102019PY007, 3102019MS0403) supported by the Fundamental Research Funds for the Central Universities, China

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Luo, J., Li, Xy., Li, C. et al. Effect of processing parameters on flow behaviors and microstructure during high temperature deformation of GH4586 superalloy. J. Cent. South Univ. 28, 338–350 (2021). https://doi.org/10.1007/s11771-021-4606-0

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Key words

  • GH4586 superalloy
  • apparent activation energy for deformation
  • strain rate sensitivity
  • constitutive model
  • processing maps

关键词

  • GH4586 高温合金
  • 表观变形激活能
  • 应变速率敏感性指数
  • 本构模型
  • 加工图