A stored energy analysis of grains with shear texture orientations in Cu-Ni-Si and Fe-Ni alloys processed by high-pressure torsion

JOURNAL OF ALLOYS AND COMPOUNDS

卷:864

Article

Azzeddine, Hiba¹  Baudin, Thierry²  Helbert, Anne-Laure²  Brisset, Francois²  Huang, Yi^3,4  Kawasaki, Megumi⁵  Bradai, Djamel⁶  Langdon, Terence G.⁴ 

[1] Univ Mohamed Boudiaf, Fac Technol, Msila, Algeria

[2] Univ Paris Saclay, CNRS, Inst Chim Mol & Mat Orsay, F-91405 Orsay, France

[3] Bournemouth Univ, Dept Design & Engn, Fac Sci & Technol, Poole BH12 5BB, Dorset, England

[4] Univ Southampton, Mat Res Grp, Dept Mech Engn, Southampton SO17 1BJ, Hants, England

[5] Oregon State Univ, Sch Mech Ind & Mfg Engn, Corvallis, OR 97331 USA

[6] Univ Sci & Technol Houari Boumediene USTHB, Lab Mat Phys, Fac Phys, POB 32, DZ-16111 Algiers, Algeria

关键词: Cu-Ni-Si alloy;    Fe-Ni alloy;    High-pressure torsion;    Shear texture;    Stacking fault energy;    Stored energy;   

DOI  :  10.1016/j.jallcom.2020.158142

来源: Elsevier

【 摘 要 】

Experiments were conducted to evaluate the evolution of the stored energy in grains with shear texture orientations A(1)* {111} <<(1)over bar>(1) over bar2 >, A(2)*{111} < 1<(2)over bar>1 >,A {111} < 1<(1)over bar>0 >, (A) over bar {111} < 0<(1)over bar>1 >, B {112} < 1<(1)over bar>0 >, (B) over bar {112} <1<(1)over bar>0> and C {100} < 110 > for Cu 2.5Ni 0.6Si and Fe-36Ni (wt%) alloys after high-pressure torsion (HPT) processing up to 10 turns at ambient temperature using a Kernel Average Misorientation (KAM) approach. A typical stable shear texture developed in the Cu-2.5Ni-0.6Si alloy immediately after 1 turn whereas there was a continuous transformation of texture in the Fe-36Ni alloy up to 10 turns. The results show that HPT processing produces similar stored energies of similar to 35 J/mol and similar to 24 J/mol but with different shear texture components for the Cu-2.5-Ni-0.6Si and the Fe-36Ni alloy, respectively. The stored energy in all shear components for the Cu-2.5Ni-0.6Si alloy increases with increasing HPT processing up to 1 turn and then slightly decreases through 10 turns. By contrast, the stored energy of the Fe-36Ni alloy continuously decreases with increasing numbers of HPT turns. These evolutions are examined with reference to the initial textures, dynamic recrystallization, grain refinement mechanisms and differences in the stacking fault energies. (C) 2020 Elsevier B.V. All rights reserved.

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