Dependence of Hardness Conversion Values upon Materials

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  • 材質によるかたさ換算値の相違について
  • ザイシツ ニ ヨル カタサ カンサンチ ノ ソウイ ニ ツイテ

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Abstract

Dependence of conversion values between Vickers and Rockwell hardnesses upon materials must be illustrated by the difference of elastic recovery which is seen in the measurement of Rockwell hardness. At first, the recovery of indentation and the changes of indented profiles were determined on the basis of the theories of plastic indentation and elastic contact. These theoretical results coincided well with those of experiments. By introducing the values of elastic recovery of indentation into the conversion formulae, the changes of conversion value by materials were explained reasonably. Thus, we can conclude the hardnesses for such materials whose conversion charts have not yet been given.

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