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

Jiao Luo, Xiang yang Li, Cong Li, Miao quan Li

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

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.

Translated title of the contributionGH4586 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
Original languageEnglish
Pages (from-to)338-350
Number of pages13
JournalJournal of Central South University
Volume28
Issue number2
DOIs
StatePublished - Feb 2021

Keywords

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

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