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Open AccessArticle

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

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Education Ministry Key Laboratory of Advanced Forging & Stamping Technology and Science, Yanshan University, Qinhuangdao 066004, China
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State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China
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School of Art and Design, Yanshan University, Qinhuangdao 066004, China
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Author to whom correspondence should be addressed.
Metals 2019, 9(11), 1146; https://doi.org/10.3390/met9111146
Received: 4 September 2019 / Revised: 21 October 2019 / Accepted: 24 October 2019 / Published: 25 October 2019
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. View Full-Text
Keywords: constitutive equation; GH4169 superalloy; microstructure evolution simulation; multidirectional forging constitutive equation; GH4169 superalloy; microstructure evolution simulation; multidirectional forging
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MDPI and ACS Style

Jin, Y.; Xue, H.; Yang, Z.; Zhang, L.; Zhang, C.; Wang, S.; Luo, J. Constitutive Equation of GH4169 Superalloy and Microstructure Evolution Simulation of Double-Open Multidirectional Forging. Metals 2019, 9, 1146.

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