Development of Ductile B2-Type Fe–Co Based Alloys

Abstract

We investigated the mechanical properties of B2-type Fe–Co based alloys containing minor amounts of Ni or Pd to improve their tensile ductility at room temperature. The yield and tensile stresses of the new alloys showed remarkable increases. Fe–Co–Ni alloys showed high total elongation of over 10% at room temperature. Co₅₀Fe₄₀Pd₁₀ alloy displayed a tensile strength of 1250 MPa and a high total elongation of 16%. The substitution of Ni or Pd into Fe–Co based alloys is therefore an extremely effective means of improving their room-temperature ductility.