Development of texture and its role in shape memory behavior in a uranium alloy

The development of preferred orientations in alloys quenched to produce metastable, crystalline phases, e.g., alloys capable of undergoing phase transformation with the application of stress and alloys already martensitic which deform by processes that are not the customary irreversible slip mechanisms, was studied. Texture development in a uranium alloy containing nominally 7.5 wt.% Nb + 2.5 wt. % Zr is reported. (GHT

The oxidation of Type 310S stainless steel in mixed gases at elevated temperatures

Sheet specimens of Type 310S stainless steel were exposed to air as well as to lean'' and rich'' sulfidizing atmospheres at temperatures near 900{degrees}C to determine the relationships that exist between the scale structure, the rate of reaction, and the stresses generated during exposure. One goal of this experimental research program was to examine how these factors might be related to the breakdown of protective scales in sulfidizing atmospheres. It was found that the scales formed in air and the lean'' atmosphere are protective and non-spalling while those formed in the rich'' atmosphere spall, initially react at rates 1000 times greater than counterparts in less aggressive atmospheres, and later exhibit a breakaway''-type rapid reaction. Only those scales formed in air provide the cooperative, tractive interfacial forces required to produce uniform dilatation and deformation of the substrate. However, evidence exists for at least localized stresses in all of the scales examined