单晶铜中球形划痕响应的尺寸效应

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2025-01-04 DOI:10.1007/s11249-024-01954-1

Jinxuan Zhu, Tao He

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引用次数: 0

摘要

由于小尺度尺寸效应的存在，对晶体材料磨损响应的表征提出了一些挑战。本研究采用基于应变梯度晶体塑性机理的理论，系统地对（101）取向铜进行了球形纳米划痕模拟，探讨了压头尺寸对划痕硬度的影响。通过比较纳米划痕的深度和形貌，对所建立的纳米划痕模型进行了实验验证。通过对比常规晶体塑性和基于应变梯度的晶体塑性模拟结果，确定了压头尺寸对划痕硬度的影响。此外，通过讨论几何必要位错长度占位错累积增量的比例，定量分析了压头尺寸对划痕硬度影响的机理。

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Size Effect on the Spherical Scratch Response in Single Crystalline Copper

The characterization of wear response in crystalline materials poses some challenges due to the presence of the size effect at small scales. In this study, we systematically conducted spherical nano-scratch simulations on (101)-oriented copper, using the mechanism-based strain gradient crystal plasticity theory, to explore the indenter size effect in the scratch hardness. The developed nano-scratch models are validated experimentally by comparing scratch depths and topographies. By examining the results obtained from conventional crystal plasticity and mechanism-based strain gradient crystal plasticity simulations, an indenter size effect in scratch hardness was identified. Furthermore, the mechanism of the indenter size effect in scratch hardness was quantitatively analyzed, by discussing the proportion of geometrically necessary dislocation lengths in the cumulative increments of dislocations.

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.