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

Jiangping Yu; Donghong Wang; Jingyang Chen; Changlin Yang; Xin Hao; Jianxin Zhou; Dayong Li; Da Shu; Chengbo Xiao; Yinghong Peng

doi:10.3390/ma14040716

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

Materials (Basel). 2021 Feb 4;14(4):716. doi: 10.3390/ma14040716.

Authors

Jiangping Yu^{1

2

3}, Donghong Wang^{1

2}, Jingyang Chen⁴, Changlin Yang⁵, Xin Hao⁵, Jianxin Zhou⁶, Dayong Li³, Da Shu^{1

2}, Chengbo Xiao⁴, Yinghong Peng³

Affiliations

¹ Shanghai Key Laboratory of Advanced High Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
² State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
³ State Key Laboratory of Mechanical System and Vibration, School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
⁴ Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China.
⁵ State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China.
⁶ State Key Laboratory of Material Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China.

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.

Keywords: high-temperature deformation; hot compression test; investment casting; mechanical properties; nickel-based superalloy.

Abstract

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