Study of Welds Service State via Grey Cluster Evaluate.

This paper has, for the first time, adopted grey cluster analysis to estimate eight kinds of states of welds in service, including strength, plasticity and toughness such as yield strength, tensile strength, elongation, percentage of section reduction and impact ductility. The cluster league is judged according to the summary of three grey leagues, and the cluster results are fully fitted with the actual status. [ABSTRACT FROM AUTHOR]