Influence of composition and structure on strength of Zr-Cr system alloys

Influence of chemistry, heat treatment and deformation on the disperse strengthening of Zr-Cr system alloys was studied. Alloying by a chrome, even by 0.5 at. %, results in the rise of Zr microhardness in 2-2,5 times depending on treatment of alloys. The conditions of the disperse strengthening of hypo eutectoid c and hypereutectoid alloys by separation of dispersion particles at Β-phase cooling up to Β → α transformation were fixed. It is shown, that in the alloys of hypereutectoid composition the separation of intermetallide occurs faster, than separation of a-phase in hypoeutectoid alloys at Β-phase cooling up to Β → α transformation. Process of cell formation during deformation in area of temperatures of a-phase existence is facilitated by the particles of intermetallide, got as a result of evtektoid transformation.