Published April 2019 | Version v1
Journal article Metadata-only

Nano-graining a particle-strengthened high-entropy alloy

Creators

  • 1. Department for Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Düsseldorf 40237 (Germany)
  • 2. Division of Materials Science and Engineering, Hanyang University, Seoul 133-791, South (Korea, Republic of)
  • 3. State Key Laboratory for Advance Metals and Materials, University of Science and Technology Beijing, Beijing 10083 (China)
  • 4. High Temperature Energy Materials Research Center, Korea Institute of Science and Technology, Seoul 136-791 (Korea, Republic of)
  • 5. School of Mechanical, Industrial & Manufacturing Engineering, Oregon State University, Corvallis, OR 97331-6001 (United States)
  • 6. School of Mechanical & Aerospace Engineering, Nanyang Technological University, Singapore 639798 (China)

Description

The possibility of further enhancing the strength of a (CoCrFeNi)94Ti2Al4 high-entropy alloy (HEA), which is already strengthened by Ni3(Ti,Al) second-phase particles, by grain refinement through high-pressure torsion (HPT) is examined. Concomitant with nanograin formation, HPT was found to induce particle dissolution and structural transformation of the remnant particles. Nanoindentation experiments of nanocrystalline HEA, with and without particles in the pre-HPT microstructure, suggests that grain boundary strengthening is the dominant strengthening mechanism.

Additional details

Identifiers

DOI
10.1016/j.scriptamat.2018.12.033;
PII
S1359646218307681;

Publishing Information

Journal Title
Scripta Materialia
Journal Volume
163
Journal Page Range
p. 24-28
ISSN
1359-6462
CODEN
SCMAF7

INIS

Country of Publication
United Kingdom
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
55043127
Subject category
S36: MATERIALS SCIENCE;
Descriptors DEI
ALLOYS; CRYSTALS; DISSOLUTION; ENTROPY; GRAIN BOUNDARIES; GRAIN REFINEMENT; NANOSTRUCTURES; TORSION
Descriptors DEC
MICROSTRUCTURE; PHYSICAL PROPERTIES; THERMODYNAMIC PROPERTIES

Optional Information

Copyright
Copyright (c) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.