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Constitutive Equation of GH4169 Superalloy and Microstructure Evolution Simulation of Double-Open Multidirectional Forging

Authors :
Yongbo Jin
Hao Xue
Zheyi Yang
Lili Zhang
Chunxiang Zhang
Sirui Wang
Junting Luo
Source :
Metals, Vol 9, Iss 11, p 1146 (2019)
Publication Year :
2019
Publisher :
MDPI AG, 2019.

Abstract

This paper presented a double-open multidirectional forging with relatively few deformation passes and a uniform deformation. The constitutive equation and dynamic recrystallization model of the GH4169 superalloy were identified based on a thermal compression test and imported into Deform simulation software. The microstructure evolution law of GH4169 superalloy undergoing double-open multidirectional forging was simulated. The evolution of the recrystallization volume fraction and recrystallized grain size of the GH4169 superalloy during double-open multidirectional forging was obtained. Both higher temperatures and more passes were found to produce more complete recrystallization and smaller recrystallization grain size. At the maximum temperature studied, 1000 °C, with nine passes, the recrystallization volume fraction exceeded 95%, and the recrystallized grain size reached 3−5.5 µm.

Details

Language :
English
ISSN :
20754701
Volume :
9
Issue :
11
Database :
Directory of Open Access Journals
Journal :
Metals
Publication Type :
Academic Journal
Accession number :
edsdoj.8f131f926e994e9cb0b3da614bc0c832
Document Type :
article
Full Text :
https://doi.org/10.3390/met9111146