The effects of initial microstructure on the creep property of a 4th generation single crystal superalloy at mediate temperature and high stress

Huanchang Duan; Yuan Cheng; Xinbao Zhao; Lijie Qiao; Wanshun Xia; Quanzhao Yue; Jiachen Xu; Yuefeng Gu; Ze Zhang

Journal of Materials Research and Technology (Mar 2025)

The effects of initial microstructure on the creep property of a 4th generation single crystal superalloy at mediate temperature and high stress

Huanchang Duan,
Yuan Cheng,
Xinbao Zhao,
Lijie Qiao,
Wanshun Xia,
Quanzhao Yue,
Jiachen Xu,
Yuefeng Gu,
Ze Zhang

Affiliations

Huanchang Duan: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China
Yuan Cheng: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China
Xinbao Zhao: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China; State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China; Corresponding author. Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China.
Lijie Qiao: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China; Huadian Electric Power Research Institute Co., Ltd, Hangzhou, 310030, Zhejiang, China
Wanshun Xia: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China
Quanzhao Yue: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China
Jiachen Xu: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China
Yuefeng Gu: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China; State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China; Corresponding author. Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China.
Ze Zhang: Institute of Superalloys Science and Technology, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China; State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027, Zhejiang, China

Journal volume & issue: Vol. 35
pp. 1391 – 1399

Abstract

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The creep properties at 800 °C and 735 MPa were examined in Ni-based single crystal superalloys (SCs) with different microstructure characteristics to systematically investigate the effects of initial microstructure on the creep property at mediate temperature and high stress. The creep life decreased monotonically with the increasing primary aging temperature, which increased both the γ channel width and size of γ′ phase. The creep resistance was mainly determined by the γ channel width and stacking fault energy in γ′ phase. Narrow γ channels and low stacking fault energy in γ′ phase enhanced the creep resistance. Additionally, the fine γ′ particles embedded within the γ channel when aging at higher temperatures could not improve the creep performance significantly. The results provided a reference for the design of heat treatment procedure.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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