Ti60合金疲劳蠕变交互作用下蠕变应力门槛值预测

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中图分类号：V252 文献标志码：A 文章编号：1000-582X（2025）04-029-11

doi：10.11835/j.issn.1000-582X.2024.257

引用格式：，等.Ti60合金疲劳蠕变交互作用下蠕变应力门槛值预测[J].重庆大学学报，2025，48（4）： 29-39.

Prediction of threshold value of creep stress in Ti60 alloy under fatigue-creep interaction

ZHAO Hanbo， ZHANG Jianyu， LIU Hao， GONG Yu （College of Aerospace Engineering， Chongqing University， Chongqing ， P. R. China）

Abstract： Fatigue-creep interaction tests were conducted on Ti60 alloy specimens at . Under test conditions of maximum fatigue stress MPa and stress ratio R=0.1 ， the influence of different creep stresses on the fatigue-creep behavior of thealloy was investigated.Based on thetest data and the Norton model，anovel method was proposed to improve the understanding of fatigue-creep behavior with a limited number of samples. This approach establishes a prediction model capable of estimating the threshold value of creep stress over extended periods through short-term experimental data. The model's predictions were compared with results from the maximum axial stress method and the step-loading method， yielding a relative error of less than 2% . The results show that the proposed prediction model can accurately determine the creep stress threshold under fatigue-creep interaction conditions.

Keywords： Ti60 alloy； fatigue-creep interaction； creep stress threshold； stress prediction model

近年来随着航空航天技术的不断发展，航空飞行器的速度取得了重大突破，更高飞行速度的服役环境对飞机结构材料的要求也随之增加。（剩余11779字）