重庆大学学报2025，Vol.48Issue(4)：29-39,11.DOI:10.11835/j.issn.1000-582X.2024.257
Ti60合金疲劳蠕变交互作用下蠕变应力门槛值预测
Prediction of threshold value of creep stress in Ti60 alloy under fatigue-creep interaction
赵翰博 1张建宇 1刘浩 1龚愉1
作者信息
- 1. 重庆大学 航空航天学院,重庆 400044
- 折叠
摘要
Abstract
Fatigue-creep interaction tests were conducted on Ti60 alloy specimens at 550℃.Under test conditions of maximum fatigue stress σmax=450 MPa and stress ratio R=0.1,the influence of different creep stresses on the fatigue-creep behavior of the alloy was investigated.Based on the test data and the Norton model,a novel 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.关键词
Ti60合金/疲劳-蠕变/蠕变应力门槛值/蠕变应力预测模型Key words
Ti60 alloy/fatigue-creep interaction/creep stress threshold/stress prediction model分类
航空航天引用本文复制引用
赵翰博,张建宇,刘浩,龚愉..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):29-39,11.
