Effects of Zirconium Additions on the Microstructure and Stress-Rupture Properties in Polycrystalline Ni-Based Superalloys

Yang Zhou, Yanna Cui, Bo Wang, Jiamiao Liang, Shuping Li, Jun Wang

科研成果: 书/报告/会议事项章节会议稿件同行评审

摘要

In the present work, comprehensive investigations were conducted to examine the distribution behavior of the minor alloying elementMinor-alloying element Zr, its impact on microstructural evolutionMicrostructural evolution and effect on the high-temperatureHigh temperaturestress-rupture propertiesStress-rupture properties in IN 100 superalloysSuperalloys. The results indicate that the presence of Zr influences the eutectic phase in as-cast alloys, resulting in a reduction in the γ channel width and an increase in both the volume fraction and size of the γ′ phase. Through the time of flight-secondary ion mass spectrometry and transmission electron microscope analysis, Zr is found to segregate along the eutectic front in the form of Ni5Zr in 900 °C stress-ruptured samples, rendering IN 100 alloys enhanced creep resistanceCreep resistance at elevated temperatures. Heat treatmentHeat treatment at 1200 °C could effectively eliminate the eutectic structure, thus mitigating the segregationSegregation of Zr. A maximum endurance life in IN 100 alloys at 900 °C/314 MPa and 950 °C/225 MPa is reached when Zr content is approximately 700 ppm. Synergistic effects including the eutectic content, volume fraction, and the degree of raftingRafting of the γ′ phase together with the dislocation networkDislocation networks structure were analyzed and discussed, contributing to the improved stress-rupture propertiesStress-rupture properties in IN 100 alloys.

源语言英语
主期刊名Superalloys 2024 - Proceedings of the 15th International Symposium on Superalloys
编辑Jonathan Cormier, Ian Edmonds, Stephane Forsik, Paraskevas Kontis, Corey O’Connell, Timothy Smith, Akane Suzuki, Sammy Tin, Jian Zhang
出版商Springer Science and Business Media Deutschland GmbH
166-175
页数10
ISBN(印刷版)9783031639364
DOI
出版状态已出版 - 2024
已对外发布
活动15th International Symposium on Superalloys, ISS 2024 - Pennsylvania, 美国
期限: 8 9月 202412 9月 2024

出版系列

姓名Minerals, Metals and Materials Series
ISSN(印刷版)2367-1181
ISSN(电子版)2367-1696

会议

会议15th International Symposium on Superalloys, ISS 2024
国家/地区美国
Pennsylvania
时期8/09/2412/09/24

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