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Processing Map Development through Elaborating Phenomenological and Physical Constitutive Based Models
Author(s) -
Farabi Ehsan,
ZareiHanzaki Abbas,
Abedi Hamid Reza
Publication year - 2016
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201500296
Subject(s) - phenomenological model , materials science , constitutive equation , hot working , strain rate , sensitivity (control systems) , flow stress , microstructure , structural engineering , mathematics , metallurgy , statistics , engineering , finite element method , electronic engineering
This study was conducted to develop a new method for constructing the processing maps. Using hot compression testing method at various temperature and strain rates, the experimental flow stress data were employed to build the activation energy map, strain rate sensitivity map, and finally the processing maps. In an alternative approach, the extracted constitutive models were utilized to develop the power efficiency and instability maps. It is found that the sinh‐based model would predict the unsafe regions of hot working conditions in a way more consistent with the experimental based prediction one in contrast with optimistic predictions of the Zerilli–Armstrong processing maps. All findings were further verified through examination of the obtained thermomechanically processed microstructures.