Abstract
The effect of the weld metal on the out-of-plane constraint in C(T) bi-material specimens was studied using the Common Format Equation (CEE) and its associated constraint factor, Ω*, as a function of the thickness-to-ligament ratio, B/b. The values of Ω* for onematerial specimens (base metal) and bi-material specimens (base metal plus weld metal) were compared. The presence of weld metal lowers the degree of constraint in the bimaterial specimens in relation to the base metal specimens, for a given B/b value. This effect is attenuated for deeply cracked specimens, the Ω* values being similar for the onematerial and the bi-material specimens.
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