Texture Studies of Superplastically Deformed Electrodeposited Nanocrystalline Ni and Ni-P Alloy

M.J.N.V. Prasad

doi:10.4028/www.scientific.net/MSF.702-703.378

Paper Titles

Texture Analysis for Determining the Rate Controlling Process in the Transient and Steady State Regions of Superplastic Flow
p.360

Key Microstructural Changes during High Strain Rate Superplastic Deformaion of an Al-Zn-Mg-Cu-Zr Alloy Containing Sc
p.366

Role of Texture in Understanding Creep Flow in HPT-Processed Ultrafine Grained Copper
p.370

Microstructural Evolution During Superplastic Forming of Al-Li 8090 Alloy
p.374

Texture Studies of Superplastically Deformed Electrodeposited Nanocrystalline Ni and Ni-P Alloy
p.378

New Insights into Cube Nuclei in Deformed Aluminium
p.385

Formation and Development of Strong Cube Recrystallization Texture in an Aluminium of Commercial Purity
p.391

Effects of Initial Parameters on the Development of Cube Texture during Recrystallization of Copper
p.398

Stability of Cube Oriented Grains during Cold-Rolling of Highly Cube-Oriented Polycrystalline Nickel
p.402

HomeMaterials Science ForumMaterials Science Forum Vols. 702-703Texture Studies of Superplastically Deformed...

Texture Studies of Superplastically Deformed Electrodeposited Nanocrystalline Ni and Ni-P Alloy

Abstract:

Nanocrystalline Ni and Ni-P alloy with grain size down to 6 nm were processed by pulsed electrodeposition. The as-deposited materials, possessing a strong fiber texture, were tested in tension at different temperatures and strain rates. Both materials exhibited low temperature superplasticity but with significant differences in mechanical characteristics. In comparison with nano-Ni, the nano Ni-P alloy exhibited significant strain hardening in flow behavior and lower superplastic elongations at relatively low strain rates, although the grain size was finer at test temperatures with limited grain growth in nano Ni-P alloy. Texture study as a function of strain and strain rate by bulk X-ray Schultz reflection and electron back scattered diffraction (EBSD) revealed development of cube components {001} and {013} with negligible deformation texture components (Cu or brass type) and limited fraction of low angle grain boundaries (< 10 %) in superplastically deformed samples. The reasons for the formation of cube components and their influence on flow behavior of electrodeposited materials were critically analyzed. Additional microstructural investigation by transmission electron microscopy revealed dislocations movement constrained by intragranular particles, leading to strain hardening and cavitation in the nano Ni-P alloy.