Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7988202 | Intermetallics | 2018 | 12 Pages |
Abstract
The microstructure, texture and mechanical properties of medium-entropy ternary CrCoNi alloy after cold rolling and annealing were investigated. The cold rolled material shows a heavily fragmented microstructure coexisting with fine scale shear bands. The deformation texture is a É-fibre with a spread between the Goss and Brass component. This type of texture during cold rolling is direct evidence of a low stacking fault energy of the CrCoNi alloy. Annealing at 700â¯Â°C yields a fully recrystallized ultrafine grained microstructure with a large fraction of annealing twins. Annealing twins play a significant role in the evolution of the annealing texture. They lead to the emergence of new orientations which have first order twin relationship (60° <111> rotation) with the É-fibre rolling texture components. Typical brass recrystallization texture BR {236} <385> component does not develop during recrystallization unlike in other low SFE alloys such as brass, Ag and Cu alloys. New prominent twin related orientations are retained with increasing annealing temperature due to the hindrance of preferential growth of certain crystallographic orientations. Tensile tests show that this alloy exhibits ultra-high strength and good ductility.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
G. Dan Sathiaraj, Werner Skrotzki, Aurimas Pukenas, Rolf Schaarschuch, R. Jose Immanuel, S.K. Panigrahi, J. Arout Chelvane, S.S. Satheesh Kumar,