Gradient nanostructured surface layer and wear resistance of 42CrMo during magnetic field assisted with ultrasonic surface rolling process

IF 6.2 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2026-04-01 Epub Date: 2026-02-19 DOI:10.1016/j.matchar.2026.116163

Qingqing Wang, Yu Bi, Zhuofu Wang, Yang Xu, Xianhua Tian, Yanhai Cheng

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引用次数: 0

Abstract

Using magneto-plasticity effect in ultrasonic surface rolling process (USPR) to improve material properties is an effective strengthening method. Gradient nanostructures and wear resistance of 42CrMo machined surface with magnetic field assisted USRP (MF-USRP) were investigated. The formations of gradient nanostructured surface layers under rolling parameters and MF intensities (maximum 0.12 T) were elucidated with finite element (FE) simulation and cellular automaton (CA) modeling, together with TEM analysis. The relationships between gradient nanostructured surface layers and wear resistance were also analyzed. FE simulation results show that strain rate is increased significantly during MF-USRP. Surface nanostructures is further refined (to about 50 nm) induced by the release of pinning effect under influence of MF, exhibiting a discontinuous dynamic recrystallization. Compared with single USRP, the friction coefficient and wear volume of machined surface with MF-USRP are reduced by 9.22% and 7.97%, respectively, which is mainly manifested as abrasive wear. The improvements in wear resistance are attributed to the increased degree of surface nanocrystallization, reduced surface roughness and surface defects. The study confirms that superposition of MF can enhance surface nanocrystallization of 42CrMo machined surface layer, which provides guidance for the development of MF-USRP technology.

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磁场辅助超声表面轧制42CrMo的梯度纳米结构表面层及耐磨性

在超声表面轧制工艺中利用磁塑性效应改善材料性能是一种有效的强化方法。研究了磁场辅助USRP （MF-USRP）加工42CrMo表面的梯度纳米结构和耐磨性。通过有限元模拟、元胞自动机建模和透射电镜分析，分析了轧制参数和MF强度（最大0.12 T）下梯度纳米结构表面层的形成。分析了梯度纳米结构表层与耐磨性之间的关系。有限元模拟结果表明，在MF-USRP过程中应变速率显著提高。在MF的作用下，由于钉钉效应的释放，表面纳米结构进一步细化（约50 nm），表现出不连续的动态再结晶。与单一USRP相比，MF-USRP加工表面的摩擦系数和磨损体积分别降低了9.22%和7.97%，主要表现为磨粒磨损。耐磨性的提高是由于表面纳米化程度的增加，表面粗糙度和表面缺陷的减少。研究证实了MF的叠加可以增强42CrMo机加工表面层的表面纳米化，为MF- usrp技术的发展提供了指导。

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.