Microscale and Mesoscale Crystallographic Textures of Nanocrystalline Ni-Based Electrodeposits

作者：Cizek P^*; Barnett M R; Nave M D; Rauch E F; Balasubramaniam R

来源：Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 2011, 42A(7): 2048-2060.

DOI：10.1007/s11661-010-0583-x

The microscale and mesoscale crystallographic textures observed in nanocrystalline Ni, Ni-20 pct Fe, and Ni-50 pct Fe electrodeposits are described. The nanosized grains are arranged in coarse mesoscale colonies. In the as-deposited state, the bulk texture of the Ni-20 pct Fe alloy displays a dominant aOE (c) 001 > fiber parallel to the macroscopic deposition direction (DD). The grains are elongated along the aOE (c) 001 > crystal lattice direction, which is mostly parallel to the local DD, producing a well-defined aOE (c) 001 >//DD fiber microtexture on a local scale. The grain misorientation histograms show some content of low-angle boundaries, frequently associated with the presence of grain clusters, and are dominated by high-angle boundaries with a possible enhanced frequency of a5 and a7 coincident site lattice boundaries and a significant content of a3 twin boundaries. For all three alloys, the coarsened grains, obtained by annealing, within the mesoscale colonies show a fiber mesotexture characterized by a aOE (c) 111 > axis approximately perpendicular to the colony hemispherical growth surface (parallel to the local DD). It is surmised that a similar "cobblestone" mesotexture with a

• 出版日期2011-7
• 单位迪肯大学