High-pressure torsion driven mechanical alloying of CoCrFeMnNi high entropy alloy

被引：89

作者：

Kilmametov, A. ^{[1
]}

Kulagin, R. ^{[1
]}

Mazilkin, A. ^{[1
,2
]}

Seils, S. ^{[3
,4
]}

Boll, T. ^{[3
,4
]}

Heilmaier, M. ^{[3
,4
]}

Hahn, H. ^{[1
]}

机构：

[1] Karlsruhe Inst Technol, Inst Nanotechnol, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[2] Russian Acad Sci, Inst Solid State Phys, Ac Ossipyan Str 2, Chernogolovka 142432, Russia

[3] Karlsruhe Inst Technol, Inst Appl Mat, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[4] Karlsruhe Inst Technol, KNMF, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

来源：

SCRIPTA MATERIALIA | 2019年 / 158卷

关键词：

High entropy alloys; Severe plastic deformation; Nanocrystalline materials; Mechanical alloying; SEVERE PLASTIC-DEFORMATION; SOLID-SOLUTION; MICROSTRUCTURE; CU; PRECIPITATION; EVOLUTION; BEHAVIOR; TRANSFORMATIONS; STABILITY; COPPER;

D O I：

10.1016/j.scriptamat.2018.08.031

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Fully-dense bulk CoCrFeMnNi high entropy alloy (HEA) has been obtained by high-pressure torsion (HPT) deformation. Elemental, micrometer sized powders were successively mixed in equimolar proportions, consolidated and deformed at 5 GPa using imposed shear strain equivalent up to 100 rotations. Transmission electron microscopy, X-ray diffraction and 3D atom probe tomography were performed to study the microstructure evolution resulting from HPT-induced mechanical alloying. Single-phase, nanocrystalline (grain size of 50 nm) alloy with smaller chromium oxide precipitates (of 7-10 nm) exhibited a hardness of 6700 MPa, which is the highest one reported for as-processed bulk CoCrFeMnNi alloys to our best knowledge. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：29 / 33

页数：5

共 47 条

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