Deformation Texture and Microstructure Evolution in Nickel and Nickel-Cobalt Alloys

Abstract:

Rolling texture evolution of pure nickel, and nickel – cobalt alloys containing 20wt.%, 40wt.%, 60wt.% cobalt content has been studied to very large true strain (ε ~ 4). The texture evolution in pure nickel and Ni-20Co was very similar, and resulted in typical Cu-type rolling texture. Microstructural analyses showed that the deformation was mostly slip dominated up to 95% beyond which it shear bands. Deformation twinning was a major deformation mechanism up to 50% reduction, and at higher strains, microstructure showed extensive shear banding. The evolution of final Goss texture in low SFE Ni-Co alloys could be explained based on the twin fraction and shear band volumes which showed grains preferably oriented towards Goss.

• Periodical: Materials Science Forum (Volumes 783-786)
• Pages: 2597-2601
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.783-786.2597
• Online since: May 2014
• Authors: R. Madhavan, Ranjit K. Ray, Satyam Suwas*
• Keywords: Deformation Twinning, Rolling Texture, Shear Band, Stacking Fault Energy (SFE)

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