U71Mn钢轨钢预腐蚀损伤的全寿命棘轮：实验与本构模型

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-07-16 DOI:10.1016/j.corsci.2025.113177

Mengzhen Xie , Xiang Xu , Zhenghong Fu , Yanan Hu , Ping Wang , Zefeng Wen , Guozheng Kang , Qianhua Kan

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引用次数: 0

摘要

对U71Mn钢轨钢进行了不同预腐蚀时间下的全寿命棘轮切削实验。结果表明，预腐蚀时间显著影响棘轮应变演化和疲劳损伤，从而降低疲劳寿命。在实验观察的基础上，建立了一个损伤耦合模型，该模型采用了一种新的初始损伤演化方程作为预腐蚀时间的函数。此外，通过扩展Abdel-Karim-Ohno模型，引入由应力记忆面和初始损伤导出的等效应力幅值，提出了一种改进的运动硬化规则。仿真结果表明，该模型能够有效地再现不同预腐蚀时间下棘轮应变的演化过程。此外，预测疲劳寿命保持在2因子误差范围内。最后，讨论了预腐蚀对棘轮形变演化和疲劳损伤的影响。

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Whole-life ratchetting of U71Mn rail steel with pre-corrosion damage: Experiments and constitutive modeling

Whole-life ratchetting experiments of U71Mn rail steel under different pre-corrosion durations were conducted. The results indicate that the pre-corrosion duration significantly influences the evolution of ratchetting strain and fatigue damage, thereby reducing fatigue life. A damage-coupled model is developed based on experimental observations, which incorporates a novel initial damage evolution equation as a function of pre-corrosion duration. Furthermore, an improved kinematic hardening rule is proposed by extending the Abdel-Karim-Ohno model and introducing an equivalent stress amplitude derived from the stress memory surface and initial damage. Simulated results confirm that the proposed model can effectively reproduce the evolution of ratchetting strain for various pre-corrosion durations. Moreover, the predicted fatigue life remains within a factor-of-two error band. Finally, the effect of pre-corrosion on the evolution of ratchetting and fatigue damage is discussed.

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.