Open AccessPerformance of two different constitutive models and microstructural evolution of GH4169 superalloy
Author(s) -
Xiawei Yang,
Wenya Li,
Yaxin Xu,
Xiurong Dong,
Kaiwei Hu,
Yangfan Zou
Publication year - 2019
Publication title -
mathematical biosciences and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.451
H-Index - 45
eISSN - 1551-0018
pISSN - 1547-1063
DOI - 10.3934/mbe.2019049
Subject(s) - superalloy , materials science , flow stress , strain rate , constitutive equation , finite element method , deformation (meteorology) , compression (physics) , microstructure , arrhenius equation , stress (linguistics) , flow (mathematics) , metallurgy , composite material , mechanics , structural engineering , engineering , physics , kinetics , linguistics , philosophy , quantum mechanics
The hot compression tests of GH4169 superalloy were performed in the deformation temperature range of 970 to 1150 ℃ and at the strain rate range of 0.001 to 10 s⁻¹. The flow stress is dependent on temperature and strain rate. The flow stresses were respectively predicted by Arrhenius-type and artificial neural network (ANN) models, and the predicted flow stresses were compared with the experimental data. A processing map can be obtained using the dynamic material models (DMM). A three-dimensional (3D) FEM model was established to simulate the hot compression process of GH4169 superalloy. Investigation of the microstructure of the deformed specimen was carried out using theoretical analysis, experimental research and FEM simulation. And the FEM model of compression tests were verified by experimental data.