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High Temperature Behaviors of a Casting Nickel-Based Superalloy Used for 815 °C

Authors
  • Yu, Jiangping1, 2, 3
  • Wang, Donghong1, 2
  • Chen, Jingyang4
  • Yang, Changlin5
  • Hao, Xin5
  • Zhou, Jianxin
  • Li, Dayong3
  • Shu, Da1, 2
  • Xiao, Chengbo4
  • Peng, Yinghong3
  • 1 (D.S.)
  • 2 State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • 3 (Y.P.)
  • 4 (C.X.)
  • 5 (X.H.)
Type
Published Article
Journal
Materials
Publisher
MDPI AG
Publication Date
Feb 04, 2021
Volume
14
Issue
4
Identifiers
DOI: 10.3390/ma14040716
PMID: 33557236
PMCID: PMC7913924
Source
PubMed Central
Keywords
License
Green

Abstract

The hot deformation behaviors of the SJTU-1 alloy, the high-throughput scanned casting Nickel-based superalloy, was investigated by compression test in the temperature range of 900 to 1200 °C and strain rate range of 0.1–0.001 s−1. The hot processing map has been constructed with the instability zone. At the beginning of hot deformation, the flow stress moves rapidly to the peak value with the increased strain rates. Meanwhile, the peak stress is decreased with the increased temperature at the same strain rates. However, the peak stress shows the same tendency with the strain rates at the same temperature. The optimum hot deformation condition was determined in the temperature range of 1000–1075 °C, and the strain rate range of 0.005–0.1 s−1. The microstructure investigation indicates the strain rate significantly affects the characteristics of the microstructure. The deformation constitutive equation has also been discussed as well.

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