STRESS-STRAIN CHARACTERISTICS OF THE HEAT-AFFECTED ZONE IN AN HY-100 WELDMENT AS DETERMINED BY MICROINDENTATION TESTING

Microindentation hardness tests were carried out on HY-100 weldments. The true stress-true strain data obtained by ''automated ball indentat ion'' on these weldments provided useful information for the various r egions of the heat-affected zone (HAZ), where traditional mechanical t esting is difficult. Detailed microstructural analyses were performed in an effort to correlate microstructural features with mechanical pro perties established for different regions of the HAZ. The results prov ide a relation between grain size and corresponding stress;strain data across the HAZ. (C) Elsevier Science., Inc 1996.