超微小押し込み試験によるビッカース硬さ値の評価

概要

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Size effect in microhardness measurement has been reported and discussed by many researchers. In spite of the efforts, decisive explanation for the size effect is not yet available. In this paper we discuss a new empirical hardness determination method for force-penetration depth curves. In order to avoid effects of grain boundaries, precipitations and deformed layer, electrolytically polished metallic single crystals of Ni, Fe, Mo and W were used. The analysis begins with relationship between force and Vickers Hardness for the same penetration depth. Then, four different types of functions are fitted to force-penetration curves to determine final forms with which one can calculate Vickers Hardness from force and penetration depth at any point of force curves.
一般社団法人日本機械学会の論文
1998-10-25