Evolution of microstructure and crystallographic texture in severely cold rolled high entropy equiatomic CoCrFeMnNi alloy during annealing

Sathiaraj, G D and Lee, C and Tsai, C W and Bhattacharjee, Pinaki Prasad (2015) Evolution of microstructure and crystallographic texture in severely cold rolled high entropy equiatomic CoCrFeMnNi alloy during annealing. IOP Conference Series: Materials Science and Engineering, 82. pp. 1-4. ISSN 1757-8981

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Abstract

An equiatomic FCC CoCrFeMnNi high entropy alloy (HEA) was heavily cold rolled up to 9 0 % reduction in thickness followed by isochronal annealing for 1 hour at temperatures ranging between 70 0ºC to 1 1 00ºC. A strong brass texture was observed in the cold - roll ed condition indicating the low stacking fault energy of the material. A fine stable microstructure was observed during annealing at low temperatures. The recrystallization texture was characterized by the presence of deformation texture components, in pa rticula r, the α -fiber (ND//<110>), S ({123} <634>) and the typical brass recrystallization texture component ({236} <385>). Annealing twins were shown to have important effect on the formation of annealing texture.

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