P3-14 超音波硬さ計硬さとマイクロビッカース硬さの比較(ポスター発表)

概要

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Examination methods of industrial hardness such as Vickers hardness and Rockwell hardness are used for the characteristic measurement of materials. These methods assume that the length of the plastic deformation is a reliable index of hardness. Since the indenters used in these methods produce deformation imprints and the methods themselves are difficult to perform, they cannot be used for ready measurement of hardness. Recently, a non-destructive ultrasonic hardness-tester that is capable of measuring the hardness of materials was developed by the authors. This tester can measure small areas rapidly and accurately. A further advantage of this tester is that it can measure the wide range hardness. Therefore, we consider that it is highly advantageous to replace conventional hardness testers with ultrasonic hardness testers. In this study, ultrasonic hardness was compared with Micro-Vickers hardness. As a result, it was understood that Micro-Vickers hardness was in proportion to the 4.25^<th> power of the index of ultrasonic hardness.
2006-11-15