Effect of dispersion strengthening on the mechanical properties of the Zr—3,2% (at.) Cr alloy at 20—700 ⁰C

Abstract

With the help of fractographic studies, the accumulation of damage during tensile testing of pure and dispersion-strengthened by intermetallics of chromium zirconium is analyzed. It is concluded that hard second-phase particles facilitate the onset of dynamic recrystallization, which increases the plasticity of the alloy. Despite presence of the SD-effect, which indicating the occurrence of breaks at the interphase boundaries, the presence of second phase particles accelerates the transition from the destruction by fusion of pores to the stretching “into a knife”.