METHOD FOR MEASURING INDENTATION HARDNESS THROUGH ANALYSIS OF INDENTATION SHAPE

摘要

A method for measuring indentation hardness through analysis of indentation shape is provided to minimize overestimation or underestimation of measuring contact area to obtain precise test result. A method for measuring indentation hardness through analysis of indentation shape includes the steps of shaping residual indentation generated by applying a load to a harden indenter in a three-dimensional shape through a shaping program to differentiate a height variation based on a distance from the indentation center, and estimating load removal hardness by determining a closed curvature of connecting contacting edges with differentiated value of zero to each other as a contact boundary, calculating a projected contacting area by integrating the inside of the contact boundary to divide the applied load with the projected contacting area. The method further includes the step of obtaining image information of the residual indentation as numeral data based on X-, Y-, and X-axes orthogonal coordinate and of converting the image information as three-dimensional cylindrical coordinate.