Coarsening Behavior of γ′ Precipitates and Compression Performance of Novel Co-Ni-Al-W Superalloy

doi:10.12442/j.issn.1002-185X.20240244

Home > Archive>Volume 53, Issue 10, 2024 >2786-2793. DOI:10.12442/j.issn.1002-185X.20240244

Coarsening Behavior of γ′ Precipitates and Compression Performance of Novel Co-Ni-Al-W Superalloy
DOI:
                        10.12442/j.issn.1002-185X.20240244
                    
Author:
                        Zhou Cheng1,2Zhou Cheng
Shenyang Research Institute of Foundry Co., Ltd, China Academy of Machinery, Shenyang 110022, China;National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China
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Jin Lei1,2Jin Lei
Shenyang Research Institute of Foundry Co., Ltd, China Academy of Machinery, Shenyang 110022, China;National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China
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Jing Gaoyang1,2Jing Gaoyang
Shenyang Research Institute of Foundry Co., Ltd, China Academy of Machinery, Shenyang 110022, China;National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China
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Yu Boyan1,2Yu Boyan
Shenyang Research Institute of Foundry Co., Ltd, China Academy of Machinery, Shenyang 110022, China;National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China
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Zhao Jun1,2Zhao Jun
Shenyang Research Institute of Foundry Co., Ltd, China Academy of Machinery, Shenyang 110022, China;National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China
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Affiliation:1.Shenyang Research Institute of Foundry Co., Ltd, China Academy of Machinery, Shenyang 110022, China;2.National Key Laboratory of Advanced Casting Technologies, Shenyang 110022, China
Clc Number:
Fund Project:Natural Science Foundation of Liaoning Province (2023-MSLH-337)

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Abstract:

The coarsening behavior of γ? precipitate phase at different temperatures and the compressive performance of novel Co-Ni-Al-W superalloy were investigated. Experiment results show that the evolution of the mean radius and volume fraction of the γ? phase obeys the classical Lifshitz-Slyozov-Wagner model. The coarsening rate of the γ? phase exhibits a significant dependence on the aging temperature, which increases from 1.30×10^-27 m³/s at 800 °C to 9.56×10^-27 m³/s at 900 °C. The activation energy of γ? phase is mainly influenced by the W diffusion in the γ matrix, presenting as 210 kJ/mol. The prepared Co-Ni-Al-W alloy possesses superb comprehensive properties, particularly the good combination of high γ? solvus temperature (1221 °C) and low density (8.7 g/cm3). Besides, the compressive yield strength of the Co-Ni-Al-W alloy at ambient and high temperatures are higher than that of other γ?-strengthened Co-based superalloys. The compressive yield strength of the Co-Ni-Al-W alloy at 850 °C is as high as 774 MPa.

Key words:Co-Ni-Al-W superalloy;γʹ phase;coarsening behavior;compressive performance

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[Zhou Cheng, Jin Lei, Jing Gaoyang, Yu Boyan, Zhao Jun. Coarsening Behavior of γ′ Precipitates and Compression Performance of Novel Co-Ni-Al-W Superalloy[J]. Rare Metal Materials and Engineering,2024,53(10):2786~2793.]
DOI：10.12442/j. issn.1002-185X.20240244

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Received:April 25,2024
Revised:June 05,2024
Adopted:June 07,2024
Online: September 27,2024
Published: September 27,2024

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