ON THE USE OF LIS EQUATION IN STRESS-RELAXATION STUDIES

The communication demonstrates an inconsistency in the application of Li's equation in that unique values of the constants cannot be defined from analysis of experimental data for stress relaxation. To illustrate this, some experimental results are presented for commercially pure alpha -titanium containing 1600 ppm C, 152 ppm H//2, 1540 ppm O//2 and 320 ppn N//2. The stress relaxation tests were conducted at different temperatures.