+Advanced Search
Study on the Dynamic Recrystallization Behavior of GH4742 Superalloy
Author:
Affiliation:

Shenyang University of Technology

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    The stress-strain curves of GH4742 at deformation temperature of 980-1100 °C and strain rate of 5×10-3 s-1 to 5 s-1 were acquired through single-pass isothermal compression experiments. The flow stress, critical strain capacity and structure evolution dynamics of GH4742 during dynamic recrystallization were systematically described on basis of experimental data using KM model, Poliak-Jonas criterion, and Avrami model. Then based on the Prasad power dissipation rate model, the structural transformation volume fraction was introduced to determine the energy variation rules during dynamic recrystallization. The mechanism underlying the dynamic recrystallization of GH4742 was revealed with the help of microstructure characterization. It was found the critical strain capacity of GH4742 during dynamic recrystallization decreased and the structural transformation volume fraction increased with the rise of deformation temperature or the decline of strain rate. The power dissipation rate of complete dynamic recrystallization was larger than 0.44, and the forming mechanism was dislocation-induced continuous dynamic recrystallization.

    Reference
    Related
    Cited by
Get Citation

[Zhou Ge, Li Jianlin, Men Yue, Zhang Haoyu, Che Xin, Zhu Xiaofei, Chen Lijia. Study on the Dynamic Recrystallization Behavior of GH4742 Superalloy[J]. Rare Metal Materials and Engineering,2021,50(4):1318~1324.]
DOI:10.12442/j. issn.1002-185X.20200336

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:May 18,2020
  • Revised:July 18,2020
  • Adopted:August 04,2020
  • Online: May 08,2021
  • Published: