Competing effects of Si additions on solid-solution softening and cleavage strength result in a minimum on ductile-brittle transition temperature (T(DBTT)), while the cooperative effect of Ni additions on both parameters causes a continual decrease in T(TDBTT). A theoretical model of T(DBTT) is proposed in terms of thermally-activated flow, the cleavage fracture stress and the plastic constraint factor. The Dorn-Rajnak theory of double-kink nucleation is shown to be a consistent model for representing the thermally-activated flow in these alloys.
|Original language||English (US)|
|Number of pages||5|
|State||Published - Jan 1 1976|
|Event||Int Conf on Mech Behav of Mater, 2nd, Proc - Boston, Mass|
Duration: Aug 16 1976 → Aug 20 1976
|Other||Int Conf on Mech Behav of Mater, 2nd, Proc|
|Period||8/16/76 → 8/20/76|