Fatigue Strength Prediction and Degradation Behavior Analysis of 6005A-T6 Aluminum Alloy Considering Fatigue Aging Effects

IF 3.1 2区材料科学 Q2 ENGINEERING, MECHANICAL

Fatigue & Fracture of Engineering Materials & Structures Pub Date : 2025-03-26 DOI:10.1111/ffe.14632

Bing Yang, Zhe Zhang, Hai Deng, Mingyang Ma, Jinbang Liu, Wenyang Shao, Chao Wang, Shoune Xiao, Guangwu Yang, Tao Zhu

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Abstract

This study conducts an in-depth analysis of the mechanical property changes of 6005A-T6 aluminum alloy under different fatigue aging states (the process in which the material's performance gradually deteriorates over time under cyclic loading). First, the evolution of surface displacement fields was analyzed using digital image correlation combined with various levels of fatigue aging pretreatment. Through single-cycle tests and tensile tests, the displacement field responses of the material in different degradation states were examined, and changes in ultimate strength, yield strength, elongation, and section shrinkage were further analyzed. Based on the existing yield strength-tensile strength-fatigue strength (Y-T-F) model, an improved approach, the Y-T-F-II model, was proposed to account for fatigue aging effects and validated for fatigue strength prediction, achieving a maximum error of only 0.17%. The results showed that fatigue aging significantly affects the fatigue strength, ductility, and toughness of 6005A-T6 aluminum alloy, and the improved model provides more accurate fatigue strength predictions under various degradation states.

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考虑疲劳老化效应的6005A-T6铝合金疲劳强度预测及退化行为分析

本研究深入分析了6005A-T6铝合金在不同疲劳老化状态下（材料性能在循环载荷下随时间逐渐劣化的过程）的力学性能变化。首先，利用数字图像相关技术结合不同程度的疲劳老化预处理，分析了表面位移场的演变规律；通过单循环试验和拉伸试验，考察了材料在不同退化状态下的位移场响应，进一步分析了材料的极限强度、屈服强度、伸长率和断面收缩率的变化规律。在现有屈服强度-抗拉强度-疲劳强度（Y-T-F）模型的基础上，提出了考虑疲劳老化效应的改进模型Y-T-F- ii，并对疲劳强度预测进行了验证，最大误差仅为0.17%。结果表明，疲劳时效对6005A-T6铝合金的疲劳强度、塑性和韧性有显著影响，改进模型能更准确地预测不同退化状态下的疲劳强度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Fatigue & Fracture of Engineering Materials & Structures 工程技术-材料科学：综合

CiteScore

6.30

自引率

18.90%

发文量

256

审稿时长

4 months

期刊介绍： Fatigue & Fracture of Engineering Materials & Structures (FFEMS) encompasses the broad topic of structural integrity which is founded on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of various materials and structural components of any scale or geometry. The editors publish original contributions that will stimulate the intellectual innovation that generates elegant, effective and economic engineering designs. The journal is interdisciplinary and includes papers from scientists and engineers in the fields of materials science, mechanics, physics, chemistry, etc.