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 stresstrue strain data obtained by “automated ball indentation” on these weldments provided useful information for the various regions of the heat-affected zone (HAZ), where traditional mechanical testing is difficult. Detailed microstructural analyses were performed in an effort to correlate microstructural features with mechanical properties established for different regions of the HAZ. The results provide a relation between grain size and corresponding stress-strain data across the HAZ.