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層錯能和溫度對不同Co含量的鎳基高溫合金蠕變性能的影響
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作者單位:

1.中國航發(fā)商用航空發(fā)動機有限責任公司，上海 200241;2.中國科學院金屬研究所 高溫合金部，遼寧 沈陽 110016;3.中國科學技術大學 材料科學與工程學院，遼寧 沈陽 110016

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基金項目:

the High Technology Research and Development Program of China (No.2014AA041701) and the National Natural Science Foundation of China (NSFC) under Grant Nos. 51171179, 51271174,51331005, and 11332010.


Effects of Stacking Fault Energy and Temperature on Creep Performance of Ni-based Alloy with Different Co Contents
Author:
Affiliation:

1.AECC Commercial Aircraft Engine Co., Ltd, Shanghai 200241, China;2.Superalloys Division, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;3.School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China

Fund Project:

High Technology Research and Development Program of China (N2014AA041701); National Natural Science Foundation of China (51171179, 51271174, 51331005, 11332010)

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    摘要:

    研究了2種不同Co含量的鎳基高溫合金分別在650 °C/630 MPa，725 °C/630 MPa和760 °C/630 MPa條件下的蠕變變形組織。通過透射電鏡分析了溫度和層錯能對蠕變變形機制的影響。結果表明，對于所選取的高溫合金來說，溫度的提升可以有效促使蠕變變形機制由層錯轉變?yōu)閷\晶。這表明孿晶的形成更大程度上取決于溫度。此外，合金Co含量的提升以及層錯能的下降都會使層錯和孿晶延伸并穿過γ基體和γ′析出相，該方式提升了材料的蠕變抗力以及蠕變壽命。

    Abstract:

    The deformation microstructures of two Ni-based superalloys with different Co contents after creep tests at 650 °C/630 MPa, 725 °C/630 MPa and 760 °C/630 MPa were investigated by transmission electron microscopy (TEM), in order to study the influence of temperature and stacking fault energy (SFE) on the creep deformation mechanisms. The results show that the improvement in temperature enhances the creep mechanism transition from stacking faults to micro-twinning for the experimental single crystal alloys, suggesting that the formation of micro-twins is dependent on temperature. Moreover, increasing Co content as well as lowering SFE allow stacking faults or micro-twins to extend through the γ matrix and γ′ precipitates, which improve the creep resistance and prolong the creep life of the alloys.

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田成剛,陶稀鵬,徐玲,崔傳勇,孫曉峰.層錯能和溫度對不同Co含量的鎳基高溫合金蠕變性能的影響[J].稀有金屬材料與工程,2021,50(10):3532~3537.[Tian Chenggang, Tao Xipeng, Xu Ling, Cui Chuanyong, Sun Xiaofeng. Effects of Stacking Fault Energy and Temperature on Creep Performance of Ni-based Alloy with Different Co Contents[J]. Rare Metal Materials and Engineering,2021,50(10):3532~3537.]
DOI：10.12442/j. issn.1002-185X. E20200038

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  • 收稿日期:2020-08-13
  • 最后修改日期:2020-12-22
  • 錄用日期:2021-01-15
  • 在線發(fā)布日期: 2021-10-28
  • 出版日期: 2021-10-25