Construction of stess-strain curves for brittle materials by indentation in a wide temperature range

Abstract

A test method procedure for constructing stress-strain curves by indentation of brittle and low plastic materials under temperature ranging from 20 to 900?C was developed recently by Yu. Milman, B. Galanov et al. According to this test method procedure stress-strain curves ? - ? for Si, Ge, SiC, TiB2 and WC/Co hard alloy were constructed in the above temperature region and mechanical parameters such as elastic point, ?e, yield stress, ?s, etc. were extracted by using the measurement results obtained by a set of trihedral pyramid indenters with different angles at the tip, ?1, ranging from 45 to 85?C.