Anisotropy and symmetry in the elastoplastic deformation of single crystals under scratching: Unravelling the microscopic deformation mechanisms

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-10-28 DOI:10.1016/j.triboint.2024.110341

Zhenting Zhang , Yan Jin Lee , Qi Yan , Hao Wang , Zhen Tong , Xiangqian Jiang

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引用次数: 0

Abstract

The nanoscratch test, as an established technique for assessing material tribological properties has received significant attention. However, the symmetry and anisotropy in scratching performances as well as the quantitative correlation between the orientation-dependent deformation and inherent microscopic deformation mechanism remain unexplored. Herein, crystal plasticity simulations can quantitatively capture scratching forces, elastic recovery, and surface pile-ups, as well as accurately describe inner deformation fields and lattice rotation patterns, as confirmed by experimental results. The simulation results reveal that surface pile-up and elastic recovery mappings on (001)-, (011)-, and (111)-oriented samples exhibit eight-fold, four-fold, and six-fold symmetries, respectively. The orientation-dependent location and intension of both slip activities and lattice rotation, determine the features of macroscopic elastoplastic deformation under scratching.

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划痕作用下单晶体弹塑性变形的各向异性和对称性：揭示微观变形机制

纳米划痕测试作为一种评估材料摩擦学特性的成熟技术受到了广泛关注。然而，划痕性能的对称性和各向异性，以及取向相关变形与固有微观变形机制之间的定量相关性仍有待探索。在此，晶体塑性模拟可定量捕捉划痕力、弹性恢复和表面堆积，并准确描述内部变形场和晶格旋转模式，这一点已得到实验结果的证实。模拟结果表明，(001)、(011)和(111)取向样品的表面堆积和弹性恢复映射分别表现出八倍、四倍和六倍对称性。滑移活动和晶格旋转的位置和张力都与取向有关，这决定了划痕作用下宏观弹塑性变形的特征。

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.