-27 m3/s增加到900 ℃時(shí)的9.56×10-27 m3/s。γ′相的活化能主要受W元素在γ基體中的擴(kuò)散影響，其活化能為210 kJ/mol。所制備的Co-Ni-Al-W合金表現(xiàn)出優(yōu)異的綜合性能，特別是具有高γ?相溶解溫度（1221 ℃）和低密度（8.7 g/cm3）的良好結(jié)合。此外，Co-Ni-Al-W合金在常溫和高溫下的壓縮屈服強(qiáng)度均高于其他γ?強(qiáng)化的Co基高溫合金，且該合金在850 ℃下的壓縮屈服強(qiáng)度高達(dá)774 MPa。"/>

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新型Co-Ni-Al-W高溫合金 γ′析出相粗化行為及壓縮性能
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1.中國機(jī)械總院集團(tuán) 沈陽鑄造研究所有限公司，遼寧 沈陽 110022;2.高端裝備鑄造技術(shù)全國重點(diǎn)實(shí)驗(yàn)室，遼寧 沈陽 110022

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Natural Science Foundation of Liaoning Province (No. 2023-MSLH-337)


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

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Natural Science Foundation of Liaoning Province (2023-MSLH-337)

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    摘要:

    研究了一種新型Co-Ni-Al-W高溫合金的γ′析出相在多種溫度條件下的粗化行為及合金的壓縮性能。實(shí)驗(yàn)結(jié)果表明，合金在時(shí)效過程中，γ′相平均半徑和體積分?jǐn)?shù)的演化遵循經(jīng)典的Lifshitz-Slyozov-Wagner模型。γ′相的粗化速率顯著依賴于時(shí)效溫度，具體表現(xiàn)為從800 ℃時(shí)的1.30×10-27 m3/s增加到900 ℃時(shí)的9.56×10-27 m3/s。γ′相的活化能主要受W元素在γ基體中的擴(kuò)散影響，其活化能為210 kJ/mol。所制備的Co-Ni-Al-W合金表現(xiàn)出優(yōu)異的綜合性能，特別是具有高γ?相溶解溫度（1221 ℃）和低密度（8.7 g/cm3）的良好結(jié)合。此外，Co-Ni-Al-W合金在常溫和高溫下的壓縮屈服強(qiáng)度均高于其他γ?強(qiáng)化的Co基高溫合金，且該合金在850 ℃下的壓縮屈服強(qiáng)度高達(dá)774 MPa。

    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.

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周成,金磊,荊高揚(yáng),于伯巖,趙軍.新型Co-Ni-Al-W高溫合金 γ′析出相粗化行為及壓縮性能[J].稀有金屬材料與工程,2024,53(10):2786~2793.[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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  • 收稿日期:2024-04-25
  • 最后修改日期:2024-06-05
  • 錄用日期:2024-06-07
  • 在線發(fā)布日期: 2024-09-27
  • 出版日期: 2024-09-27