Enhancement of ductility in B2-type intermetallic compound with martensitic transformation

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The improvement of tensile ductility of B2-type ZrCo-based alloy were performed by martensitic transformation. The mechanism of ductility enhancement in those alloys was also discussed. The tensile strength and elongation were increased by substituting Ni or Pd or Pt for Co in the ZrCo-based alloy. The deformation-induced martensite was dominantly formed in the B2 parent phase near the fractured edge. Consequently, we conclude that the remarkable enhancement of the ductility is due to the transformation-induced plasticity associated with the deformation-induced martensite.