LAPSE:2019.1070
Published Article
LAPSE:2019.1070
Flow Behavior and Hot Processing Map of GH4698 for Isothermal Compression Process
Rongchuang Chen, Haifeng Xiao, Min Wang, Jianjun Li
September 30, 2019
An in-depth understanding of the flow behaviors of materials deformed at high temperatures is of paramount significance. However, insufficient research on the nickel-based GH4698 alloy has resulted in inaccurate material flow prediction or even cracking in the practical billet opening of GH4698 large forgings. In this study, hot compressions were performed at 950−1150 °C and 0.001−3 s−1. Single-peaked strain-stress curves were obtained under various conditions, owing to dislocation motions in dynamic recrystallizations. The Arrhenius model was formulated to accurately describe the flow stress evolutions and the mean prediction error of the flow stress was 5.90%. Processing maps were constructed at various hot working conditions. It was found that the hot working ability of GH4698 markedly decreased under lower temperatures (950−1080 °C) and higher strain rates (0.1−3 s−1). Optimal thermal processing parameters were suggested. In sum, this study systematically investigated the flow behaviors and hot working ability of GH4698 in isothermal compressions.
Keywords
arrhenius equation, flow behavior, nickel-based alloy, processing maps
Subject
Suggested Citation
Chen R, Xiao H, Wang M, Li J. Flow Behavior and Hot Processing Map of GH4698 for Isothermal Compression Process. (2019). LAPSE:2019.1070
Author Affiliations
Chen R: School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, China [ORCID]
Xiao H: School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, China
Wang M: School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, China
Li J: School of Materials Science and Engineering, Huazhong University of Science and Technology, and State Key Laboratory of Materials Processing and Die & Mould Technology, Wuhan 430074, China
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Journal Name
Processes
Volume
7
Issue
8
Article Number
E491
Year
2019
Publication Date
2019-08-01
Published Version
ISSN
2227-9717
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PII: pr7080491, Publication Type: Journal Article
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LAPSE:2019.1070
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doi:10.3390/pr7080491
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Sep 30, 2019
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Sep 30, 2019
 
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Calvin Tsay
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