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<p>In tribology, nanoscratch testing is used to evaluate the mechanical and tribological properties of materials by employing a nanoscale indenter. At this scale, size-dependent plasticity effects, particularly those related to scratch hardness, become significant. Additionally, the anisotropic nature of crystalline materials means that the crystal orientation of the samples plays a crucial role. This study focuses on investigating the effects of indentation, grain size, and crystal orientation by applying the finite element method (FEM) with a lower-order strain gradient crystal plasticity framework. Results for scratch hardness, friction coefficient, and pile-up patterns are analyzed to identify the experimental trends, providing insights into how size and orientation effects influence material behavior in nanoscratch testing.</p>

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Analysis of the size effect in the nanoscratching process of single crystalline and polycrystalline materials

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年8月14日

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  • Enes Günay,
  • Tuncay Yalçinkaya

摘要

In tribology, nanoscratch testing is used to evaluate the mechanical and tribological properties of materials by employing a nanoscale indenter. At this scale, size-dependent plasticity effects, particularly those related to scratch hardness, become significant. Additionally, the anisotropic nature of crystalline materials means that the crystal orientation of the samples plays a crucial role. This study focuses on investigating the effects of indentation, grain size, and crystal orientation by applying the finite element method (FEM) with a lower-order strain gradient crystal plasticity framework. Results for scratch hardness, friction coefficient, and pile-up patterns are analyzed to identify the experimental trends, providing insights into how size and orientation effects influence material behavior in nanoscratch testing.