Iterative mesh-based hardness mapping

Hardness mapping permits quantication of the properties of materials over microstructurally signicant lengths. A technique has been developed whereby hardness maps can be generated to account for specic weld geometry and further rened using an adaptive approach. Once a preliminary map is produced, subsequent indents are placed in high hardness gradient locations to decrease interpolation distances between indentation sites. The method is demonstrated with 3 test cases: an Al-7010 friction stirweld, an Alloy 600/82 (NeT TG6) weld and a SA508-4N/ Alloy 82/316LN dissimilar metal weld. The results show the method has identied and resolved high regions with elevated hardness gradients. This provides the ability to resolve weld regions rapidly across large areas minimizing indent counts.