The strength, hardness and ductility of Ni3Al with and without boron

Microstructure and mechanical properties of Ni3Al base alloy reinforced with Cr particles produced by powder metallurgy

“…Thus the hindering of the cross slip should be more efficient in NAC-10Cr due to the higher volume fraction of second phase particles. On the other hand, the fine grain size of these materials may also account for the non-increase in yield stress with the temperature, since it is well known that this phenomenon does not occur in fine grain Ni 3 Al alloys (!5 mm) [20]. As has been commented in the results section, the NAC material has a slightly coarser grain size than the NAC-10Cr material, and thus the former may exhibit a small yield stress increase with the temperature while the reinforced material does not.…”

Flexure Strength of Melt‐Infiltration‐Processed Titanium Carbide/Nickel Aluminide Composites

“…22 Indeed, if the Ni 3 Al grain size is sufficiently small (i.e., ∼3 m), the presence of such a maximum in the yield-stress-temperature curve can be completely suppressed. 23 Although most Ni 3 Al alloying additions increase the yield stress, they typically reduce the value of T p (examples include niobium, tantalum, hafnium, silicon, and germanium). 24,25 An exception to this behavior is titanium, which has negligible effect on T p at titanium contents of <8 at.% and only slightly increases the yield strength.…”

Size Scaling in the Self-Immortalization of Superdislocations in the L12 Compounds Displaying the Yield Strength Anomaly

“…To the authors' knowledge, studies of the grain-size dependence of the hardening rate are not available. Hall-Petch type studies [11,12] do reveal an anomalous behavior for Ni 3 AI. In particular, the yield strength is observed to scale as d-0 8 with d the grain size.…”