Ti60合金疲勞蠕變交互作用下蠕變應力門檻值預測

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中圖分類號：V252 文獻標志碼：A 文章編號：1000-582X（2025）04-029-11

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

引用格式：，等.Ti60合金疲勞蠕變交互作用下蠕變應力門檻值預測[J].重慶大學學報，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

近年來隨著航空航天技術的不斷發(fā)展，航空飛行器的速度取得了重大突破，更高飛行速度的服役環(huán)境對飛機結構材料的要求也隨之增加。（剩余11779字）