Effect of grain size on fatigue strength of 304 stainless steel

被引：0
|
作者：
Duan, Hongyan [1 ]
Zhang, Zengwang [1 ]
Zhao, Yingjian [1 ]
Liu, Yang [1 ]
Yue, Sunqiang [1 ]
He, Hong [1 ]
机构：
[1] Lanzhou Univ Technol, Coll Mech & Elect Engn, Lanzhou 730050, Peoples R China
来源：
HIGH TEMPERATURE MATERIALS AND PROCESSES | 2024年 / 43卷 / 01期
基金：
中国国家自然科学基金;
关键词：
grain size; microscopic deformation mechanism; tensile strength; work hardening ability; fatigue strength prediction; MODEL;
D O I：
10.1515/htmp-2022-0314
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, three types of 304 stainless steel samples with different strengths were prepared by refining the grain size through rolling. The microstructure of the samples was observed by electron microscopy. The influence of grain size on the static tensile properties and fatigue strength of the material is mainly attributed to changes in the plastic deformation fracture mechanism and micro-deformation mechanism. In addition, a new fatigue strength prediction model is proposed based on the influence of tensile strength and work-hardening capacity. Compared with the staircase method and Basquin formula models, the proposed model maintains the accuracy of fatigue strength prediction while reducing the cost of fatigue experiments. This provides a new approach for predicting the fatigue strength of specific materials and improving anti-fatigue design capabilities.
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页数：11
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