ASD Technical Report, Numéro 63,Partie 309

2nd cast lot A/o Al alloy A/o Ga activity of gallium aging temperature AlCr2 aluminum argon as-cast bicrystal Boundary and Bulk bulk hardening bulk hardness cold-water quench composition contamination heat treatment cooling rate difference diffusion constant distance electrode Figure free energy function of temperature Ga₂O gallium galvanic cell gas cooling gas/alloy interface gas/metal interface grain bound grain boundary hardening Hardening in NiGa hardening kinetics hardening rate hardening reaction hardness contour hardness level hardness traverses hardness values Hence homogeneity range homologous temperature hydrogen intermetallic compound J. H. Westbrook kcal lattice parameter lot GE Res melting microns minutes molal free energy molybdenum MoSi2 NiAl Alloys NiAl samples NiGa observed obtained oil quenching oxide oxygen atom oxygen concentration oxygen diffusion oxygen exposure partial molal free perature plotted quenching temperature rate of hardening reheating Schenectady shown slow cool Soaking in Oxygen stoichiometry structure surface hardening tantalum Wright-Patterson AFB