Rapid determination of metal strength from hardness tests

摘要

Means and method for making rapid determinations of the strength of metal materials from hardness evaluations of the materials. The means comprises an indentor for making impressions in a metal material, the indentor having a known predetermined dimension. Apparatus for mechanically directing the indentor against the material is provided and mechanically connected to the indentor. The driving apparatus moves the indentor against the material under successive predetermined loads or forces and in a manner that makes a series of impressions in the material. Means are provided for characterizing the respective geometries of the impressions, and means are provided for utilizing the dimension of the indentor, the values of the applied loads, and the respective geometries, to calculate the yield and/or tensile strength of the material therefrom.