应力对DD5单晶高温合金持久过程中析出相的影响

doi:10.7527/S1000-6893.2020.24073

材料工程与机械制造

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应力对DD5单晶高温合金持久过程中析出相的影响

吕培森¹, 高强¹, 李常金², 刘丽荣¹, 张明俊³, 彭志江³

1. 沈阳工业大学材料科学与工程学院, 沈阳 110870;
2. 锦州捷通铁路机械股份有限公司, 锦州 121019;
3. 中国航发沈阳黎明发动机责任有限公司, 沈阳 110043

收稿日期:2020-04-08 修回日期:2020-04-27 出版日期:2021-06-15 发布日期:1900-01-01
通讯作者: 刘丽荣 E-mail:lrliu@sut.edu.cn
基金资助:
先进高温结构材料国防科技重点实验室项目资助（6142903180104）

Effect of stress on precipitated phases in DD5 single crystal superalloy during stress rupture tests

LV Peisen¹, GAO Qiang¹, LI Changjin², LIU Lirong¹, ZHANG Mingjun³, PENG Zhijiang³

1. School of Material Science and Engineering, Shenyang University of Technology, Shenyang 110870, China;
2. Jinzhou Jietong Railroad Machinery Co. Ltd, Jinzhou 121019, China;
3. AECC Shenyang Liming Aero-Engine Co. Ltd, Shenyang 110043, China

Received:2020-04-08 Revised:2020-04-27 Online:2021-06-15 Published:1900-01-01
Supported by:
Funded by the Key Laboratory of Advanced High-temperature Structural Materials for National Defense Science and Technology (6142903180104)

摘要/Abstract

摘要： 利用扫描电镜和透射电镜研究了DD5单晶高温合金在持久性能测试过程中试样不同位置析出相的析出规律，分析了应力对析出相析出行为的影响并鉴定了两种析出相的种类。研究结果表明该合金在1 038 ℃/172 MPa条件下随着局部拉应力的增大，枝晶间和枝晶干析出相数量都明显增加；合金在871 ℃/552 MPa条件下只在枝晶间区域析出少量粒状析出相，且随拉应力的增大，析出相数量有所增加；透射电镜分析表明合金的枝晶干区域的析出相主要为μ相，枝晶间析出粒状析出相主要为M₂₃C₆碳化物相。

关键词: 单晶高温合金, 应力, 持久性能, μ相, M₂₃C₆碳化物

Abstract: The precipitation of second phase particles at different sites of the specimen in DD5 single crystal superalloy during stress rupture tests is investigated using a scanning electron microscope and a transmission electron microscope. Effect of stress on the precipitation of the second phases and the crystal structure of the two precipitated phases are analysed. The results show that at 1 038℃/172 MPa, with the increase of the local tensile stress, the number of precipitated phases in both the interdendritic region and the dendrite arm increases obviously, whereas at 871℃/552 MPa, only a small number of granular precipitates are precipitated in the interdendritic region, and the number of precipitates increases with the increase of the tensile stress. The TEM analysis shows that the phase precipitated in the dendrite arm is mainly μ phase with a rhombohedral structure and that precipitated in the interdendritic region is mainly M₂₃C₆ phase.

Key words: single crystal superalloy, stress, stress rupture properties, μ phase, M₂₃C₆ carbide

中图分类号:

吕培森, 高强, 李常金, 刘丽荣, 张明俊, 彭志江. 应力对DD5单晶高温合金持久过程中析出相的影响[J]. 航空学报, 2021, 42(6): 424073-424073.

LV Peisen, GAO Qiang, LI Changjin, LIU Lirong, ZHANG Mingjun, PENG Zhijiang. Effect of stress on precipitated phases in DD5 single crystal superalloy during stress rupture tests[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(6): 424073-424073.

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应力对DD5单晶高温合金持久过程中析出相的影响

Effect of stress on precipitated phases in DD5 single crystal superalloy during stress rupture tests

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