Study on Creep-Fatigue Mechanical Behavior and Life Prediction of Ti(2)AlNb-Based Alloy

Low-cycle fatigue, creep and creep-fatigue tests of Ti(2)AlNb-based alloy were carried out at 550 °C. Compared with low-cycle fatigue, a creep-fatigue hysteresis loop has larger area and smaller average stress. The introduction of creep damage will greatly reduce the cycle life, and change the fatig...

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Detalles Bibliográficos
Autores principales: Wang, Yanju, Wang, Xinhao, Yang, Yanfeng, Lan, Xiang, Zhang, Zhao, Li, Heng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9501530/
https://www.ncbi.nlm.nih.gov/pubmed/36143548
http://dx.doi.org/10.3390/ma15186238
Descripción
Sumario:Low-cycle fatigue, creep and creep-fatigue tests of Ti(2)AlNb-based alloy were carried out at 550 °C. Compared with low-cycle fatigue, a creep-fatigue hysteresis loop has larger area and smaller average stress. The introduction of creep damage will greatly reduce the cycle life, and change the fatigue crack initiation point and failure mechanism. Based on the linear damage accumulation rule, the fatigue damage and creep damage were described by the life fraction method and the time fraction method, respectively, and the creep-fatigue life of the Ti(2)AlNb-based alloy is predicted within an error band of ±2 times.

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