Cold rolling texture of Ni-based L1 2 ordered intermetallic alloys

Abstract

Cold rolling textures of three kinds of Ni-based intermetallic alloys with L1 2 ordered structure (i.e., Ni3(Si.Ti), Ni3Al, and Ni3Fe) were investigated by the orientation distribution function (ODF). For comparison, the rolling texture of pure nickel with fee disordered structure was also determined. The rolling textures of the 70% and 90% cold-rolled L12 alloys as well as fee nickel are composed of the α-fiber ([011] 〈100〉 (G) - (011) 〈211〉 (Bs))and β-fiber ({112}〈111〉 (C) - [123] 〈634〉(S) - {011}〈211〉 (Bs)) components, but the {011}〈211〉(Bs)(and also the {011} 〈100〉 (G)) orientation is remarkable in the L1 2 alloys while the {123} 〈634〉 (S) (and also the {112} 〈111〉 (C) orientation is prominent in fcc nickel. Moreover, the intensity of rolling texture in the L1 2 alloys depended on materials (i.e., constituent elements). The observed rolling texture of the L1 2 ordered alloys was discussed in terms of cross slips of extended dislocations whose width was estimated by the energies of stacking-fault-like defect (SFLD) (i.e., antiphase boundary (APB) in the case of L1 2 ordered structure and stacking fault (SF) in the case of fee disordered structure). © 2006 The Japan Institute of Metals.