Indentation load-displacement behaviour during conventional hardness testing

被引：0

作者：

Cook, Robert F. ^{[1
]}

Pharr, George M. ^{[1
]}

机构：

[1] T J Watson Research Cent, Yorktown Heights, United States

来源：

Journal of hard materials | 1994年 / 5卷 / 04期

关键词：

Hardness - Loads (forces) - Mechanical variables measurement - Oxides - Polymers - Recovery - Semiconductor materials;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The behaviour of a range of materials was examined using a hardness tester instrumented to measure load and displacement during conventional Vickers indentation. For a peak load of 3 N, rise times of 0.2-0.6 s and maximum displacements of 5-25 μm were observed for three metals, two oxides, a semiconductor and a polymer. The materials with small modulus E or hardness H values exhibited large displacements during indentation loading, whereas the displacement recovery was greatest for materials with small E/H ratios. Recovery ratios varied between 0.6 and 0.1. The coefficient of restitution (measured by the area enclosed by the load-displacement response during the unloading sequence relative to that enclosed during loading) was also larger for materials with small E/H ratios. Coefficients of restitution varied between 0.9 and 0.5.

引用

页码：179 / 190