董建新, 白元强, 徐志超, 谢锡善, 章守华. GH169高温合金长期时效的组织转变[J]. 工程科学学报, 1993, 15(6): 567-571. DOI: 10.13374/j.issn1001-053x.1993.06.005
引用本文: 董建新, 白元强, 徐志超, 谢锡善, 章守华. GH169高温合金长期时效的组织转变[J]. 工程科学学报, 1993, 15(6): 567-571. DOI: 10.13374/j.issn1001-053x.1993.06.005
shu
Dong Jianxin, Bai Yuanqiang, Xu Zhichao, Xie Xishan, Zhang Shouhua. Microstructure of Long Time Aging in GH169 Alloys[J]. Chinese Journal of Engineering, 1993, 15(6): 567-571. DOI: 10.13374/j.issn1001-053x.1993.06.005
Citation: Dong Jianxin, Bai Yuanqiang, Xu Zhichao, Xie Xishan, Zhang Shouhua. Microstructure of Long Time Aging in GH169 Alloys[J]. Chinese Journal of Engineering, 1993, 15(6): 567-571. DOI: 10.13374/j.issn1001-053x.1993.06.005
shu

GH169高温合金长期时效的组织转变

Microstructure of Long Time Aging in GH169 Alloys

    摘要
  • 摘要: 对GH169合金长期时效的组织结构观察表明,合金在650℃以下时效甚至长达5×104h,其组织变化并不明显,保持了良好的组织稳定性。然而超过650℃,合金的组织对温度极为敏感,发生了复杂的相转变。通过对运行2.8×104h的涡轮盘榫齿的研究表明,应力加速诱发这种复杂的相变过程。

     

    Abstract: Microstructure after long time aging have been observed by means of SEM in GH169 alloys. The results show that the microstructure almost no variation after long time aging up to 5×104h below 650℃, and reveals higher structure stability. However, microstructure is very sensitive to aging temperature beyond 650℃, and there existed complicated phase transformation. The experimental results also show that stress accelerates the complicated phase transformation by observing GH169 gas turbine disk with an engine service life of 2.8×104h

     

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