Nanoindentation Size Effect of KDP Crystal by Instrumented Indentation Testing
Nanoindentation Size Effect of KDP Crystal by Instrumented Indentation Testing
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DOI：
10.4028/www.scientific.net/kem.364-366.188
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发表时间：
2007-12
期刊：
影响因子：
--
通讯作者：
H.X. Wang;J. Wang;S. Dong
中科院分区：
文献类型：
--
作者：
H.X. Wang;J. Wang;S. Dong
压痕试验和单点划痕试验可能是测量脆性材料弹性、塑性和断裂行为的最简单方法。在本文中，研究了 KDP 单晶的近表面机械性能，包括杨氏模量 E 等弹性和硬度 H 等塑性。这些材料性能可用于预测光学制造操作中的材料响应。通过纳米压痕试验考察了不同载荷下KDP单晶不同晶面的硬度和弹性模量，系统分析了压痕载荷对硬度和弹性模量的影响。结果表明纳米压痕尺寸效应，即硬度和弹性模量随着压痕载荷的减小而增大。同一晶面不同晶向的硬度和弹性模量具有较强的各向异性。
Indentation tests and single-point scratch tests are probably the simplest methods of measuring the elastic, plastic and fracture behavior of brittle materials. In this paper, the nearsurface mechanical properties of KDP single crystal have been investigated including the elasticity like Young’s modulus E, and the plasticity like the hardness H. These material properties can be used to predict the material responses in optical manufacturing operations. Hardness and elastic modulus on different crystal plane of KDP single crystal have been examined under different loads by nanoindentation test, and the influence of the indentation load on hardness and elastic modulus have been also analyzed systematically. The results show the nanoindentation size effect, that is, the hardness and elastic modulus increase as the indentation load decreases. The hardness and elastic modulus have strong anisotropy in the different crystallographic orientation of the same crystal plane.