加载频率对316L不锈钢疲劳寿命的影响及一般关系

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2025-04-07 DOI:10.1016/j.ijfatigue.2025.108976

Mingsan Chen , Chong Wang , Sen Tang , Wenyu Zhong , Bo Xu , Xiaoming Bai , Kaikai Shi , Qingyuan Wang

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引用次数: 0

摘要

频率效应是高周疲劳试验加速技术中的一个关键问题。在本研究中，对奥氏体钢分别在600 Hz、1 kHz频率下进行了振动疲劳和20 kHz频率下的高周疲劳超声弯曲疲劳试验。试件的规截面和加载形式在相同的条件下设计，避免了体积效应和应力状态的影响，保证了疲劳数据的完全可比性。结果表明，频率对疲劳性能有显著影响。然而，断口分析显示，断裂机制保持不变。因此，我们建立了频率与Basquin公式参数之间的相关性，发现该公式适用于预测具有其他频率的物品的结果疲劳寿命。随后，考虑了不同频率下应变速率和温升的影响，建立了通用寿命预测模型，提高了预测精度。在该模型中，仅使用20 kHz的疲劳数据就可以有效地预测给定频率和载荷幅值下的疲劳寿命，这意味着该模型可以用于不同频率下疲劳寿命数据的转换。

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The effect and general relation of loading frequency on fatigue life of 316L stainless steel

The frequency effect constitutes a key issue in the acceleration technology of high cycle fatigue testing. In this study, fatigue tests were conducted on an austenitic steel at frequencies of 600 Hz, 1 kHz by vibration fatigue, and 20 kHz ultrasonic bending fatigue up to high cycle regime, respectively. The gauge section and loading form of the specimen were designed in the same condition to avoid influence from the volume effect and stress state, and to ensure the fatigue data are fully comparable. The results demonstrated that the fatigue properties were significantly affected by frequencies. Nevertheless, fractographic analysis revealed that the fracture mechanism remained the same. Therefore, we established a correlation between the frequency and the parameters of the Basquin formula, which was found suitable to predict fatigue life for results in articles with other frequencies. Subsequently, a general life prediction model was provided with improved accuracy by accounting for the impact of strain rate and temperature rise in different frequencies. In this model, the fatigue life under a given frequency and loading amplitude could be effectively predicted merely by using the fatigue data at 20 kHz, which means that the model may applied to convert data on the fatigue life among different frequencies.

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来源期刊

International Journal of Fatigue 工程技术-材料科学：综合

CiteScore

10.70

自引率

21.70%

发文量

619

审稿时长

58 days

期刊介绍： Typical subjects discussed in International Journal of Fatigue address: Novel fatigue testing and characterization methods (new kinds of fatigue tests, critical evaluation of existing methods, in situ measurement of fatigue degradation, non-contact field measurements) Multiaxial fatigue and complex loading effects of materials and structures, exploring state-of-the-art concepts in degradation under cyclic loading Fatigue in the very high cycle regime, including failure mode transitions from surface to subsurface, effects of surface treatment, processing, and loading conditions Modeling (including degradation processes and related driving forces, multiscale/multi-resolution methods, computational hierarchical and concurrent methods for coupled component and material responses, novel methods for notch root analysis, fracture mechanics, damage mechanics, crack growth kinetics, life prediction and durability, and prediction of stochastic fatigue behavior reflecting microstructure and service conditions) Models for early stages of fatigue crack formation and growth that explicitly consider microstructure and relevant materials science aspects Understanding the influence or manufacturing and processing route on fatigue degradation, and embedding this understanding in more predictive schemes for mitigation and design against fatigue Prognosis and damage state awareness (including sensors, monitoring, methodology, interactive control, accelerated methods, data interpretation) Applications of technologies associated with fatigue and their implications for structural integrity and reliability. This includes issues related to design, operation and maintenance, i.e., life cycle engineering Smart materials and structures that can sense and mitigate fatigue degradation Fatigue of devices and structures at small scales, including effects of process route and surfaces/interfaces.