Simultaneously improving corrosion and fatigue resistance of A100 steel by laser assisted ultrasonic nanocrystal surface modification

IF 5.7 2区材料科学 Q1 ENGINEERING, MECHANICAL

International Journal of Fatigue Pub Date : 2025-05-08 DOI:10.1016/j.ijfatigue.2025.109056

Weidong Zhao , Yalin Dong , Chang Ye , Jingwei Zhao

引用次数: 0

Abstract

This study employs a cutting-edge process known as laser-assisted ultrasonic nanocrystal surface modification (LA-UNSM) to form a surface composite gradient deformation layer on A100 ultra-high strength steel to harmonize its corrosion and fatigue characteristics. The results revealed that the innovative method softened the sample surface via laser preheating, while the ultrasonic impact forged a composite gradient deformation layer consisting of oxides, low-angle grain boundaries, densely packed dislocations, and refined grains. Concurrently, the dual-action of laser preheating and ultrasonic impact imprinted a gradient-hardened layer approximately 200 μm deep, and a compressive residual stress field extending up to 420 μm. By forming the composite gradient deformation layer and compressive residual stress field, LA-UNSM notably solved the contradiction between corrosion and fatigue properties.

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激光辅助超声纳米晶表面改性同时提高A100钢的耐腐蚀和抗疲劳性能

本研究采用激光辅助超声纳米晶表面改性技术（LA-UNSM）在A100超高强度钢表面形成复合梯度变形层，以协调其腐蚀和疲劳特性。结果表明，该方法通过激光预热使试样表面软化，而超声冲击锻造出由氧化物、低角度晶界、密集位错和细化晶粒组成的复合梯度变形层。同时，在激光预热和超声冲击的双重作用下，形成了约200 μm深的梯度硬化层，压缩残余应力场延伸至420 μm。通过形成复合梯度变形层和压缩残余应力场，LA-UNSM显著解决了腐蚀性能与疲劳性能之间的矛盾。

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

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.