TITLE:
Quadratic Model for Predicting the Hardness of Heat Affected Zone in Water Cooled Cast Iron Weldment In Relation to Similarly Cooled Aluminum and Mild Steel Weldments
AUTHORS:
C. I. Nwoye
KEYWORDS:
Model, Hardness, Heat Affected Zone, Cast Iron Weldments, Aluminum, Mild Steel.
JOURNAL NAME:
Journal of Minerals and Materials Characterization and Engineering,
Vol.8 No.10,
October
20,
2009
ABSTRACT: Quadratic and linear models have been derived for predicting the heat-affected zone (HAZ)
hardness of water cooled cast iron weldment in relation to the combined and respective values of
the heat-affected zone hardness of aluminum and mild steel welded and cooled under the same
conditions. It was found that the validity of the model is rooted on the fractional expression;
γ/3.0749θ + γ/3.0749β + θ/3.0749β = 1. The respective deviations of the model-predicted heataffected zone hardness values of aluminum, cast iron and mild steel from the corresponding
experimental values were less than 0.01% which is quite insignificant, indicating reliability of
the model.