823 微小押込み試験における誤差因子

概要

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A micro-indentation test is useful for evaluating mechanical properties of micro-structure. But there are many effective error factors because the measurement values are very small. The influences of some factors, work-hardened surface, strain rate, temperature change. roughness and contact area change were investigated with micro-indentation tests and finite element analyses. A work-hardened surface which is made by mechanical polishing changes the properties of a non-worked material. It is important to improve the elastic modulus and the hardness by changing the calculated value to measured value. A strain rate expands a hardness and changes an elastic modulus. Measuring an elastic modulus is more sensitive to a temperature change than measuring a hardness. A surface roughness makes a measurement value dispersed because a first contact height is changed variously.
一般社団法人日本機械学会の論文
2002-09-20