Abstract
Low-cycle fatigue, creep and creep-fatigue tests of Ti2AlNb-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 Ti2AlNb-based alloy is predicted within an error band of ±2 times.
Funder
National Major Science and Technology Project
Subject
General Materials Science
Reference26 articles.
1. Next Generation Nuclear Plant Steam Generator and Intermediate Heat Exchanger Materials Research and Development Plan;Wright,2010
2. Creep–fatigue endurance of 304 stainless steels
3. A Creep-Fatigue Life Prediction Model Based on Strain Energy Density Exhuastion Criterion and its Application on Aero-Engine Turbine Discs;Wang;Ph.D. Thesis,2019
4. Intermetallic Alloys Based on Orthorhombic Titanium Aluminide;Kumpfert,2001
5. Synthesis, properties and applications of titanium aluminides
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