The effect of surface gradient nanostructure and compressive residual stress on fretting fatigue of A100 ultra-high strength steel by ultrasonic surface rolling process

IF 5.7 2区 材料科学 Q1 ENGINEERING, MECHANICAL International Journal of Fatigue Pub Date : 2024-12-16 DOI:10.1016/j.ijfatigue.2024.108775
Weidong Zhao, Daoxin Liu, Hailan Shi, Zhiqiang Hao, Jingwei Zhao
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Abstract

The critical challenge in enhancing the fretting fatigue performance of A100 ultra-high strength steel (A100 steel) involved reconciling the conflicting attributes of strength and toughness. In our study, the ultrasonic surface rolling process (USRP) was harnessed to induce gradient nanostructures and a compressive residual stress field on the surface of A100 steel, with the goal of strengthening its wear and fatigue resistance. Through meticulous optimization of USRP parameters over 30 passes, a gradient nanostructure with a substantial depth of approximately 400 μm was successfully formed, while minimizing the martensite lath width on the surface to a mere 44.5 nm. The nanocrystalline mechanism of USRP treatment of A100 steel was the interaction of dislocation proliferation and nailing of nanoscale carbides to form high density low angle grain boundaries and smaller martensitic laths. The introduction of these gradient nanostructures resulted in a notable increase in the depth of the hardened layer and the compressive residual stress field, doubling the original state. Additionally, the fretting fatigue threshold was found to be enhanced by 14.3 %. A factor separation approach revealed that the combined influence of the gradient nanostructure and compressive stress field considerably improved resistance to fretting wear and extended fatigue life. This synergy effectively curbed the nucleation and growth of fretting fatigue cracks, with the compressive residual stress playing a pivotal role in bolstering fretting fatigue resilience.
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来源期刊
International Journal of Fatigue
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.
期刊最新文献
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