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Title: Nanoindentation Creep Behavior of CoCrFeNiMn High-Entropy Alloy under Different High-Pressure Torsion Deformations

Abstract

CoCrFeNiMn high-entropy alloy (HEA) has gained increasing attention in recent years. In this work, CoCrFeNiMn HEA was prepared by arc melting and casting method; and high-pressure torsion (HPT) technology was used to refine the grains. A series of nanoindentation experiments was used to investigate the effect of different loading rates and deformations on the nanoindentation creep behavior of the CoCrFeNiMn HEA. The results show that the grain size of the CoCrFeNiMn HEA refines to the nanoscale after HPT. However, grain refinement is not obvious with further increasing HPT rotation. The loading rate and HPT rotations have an obvious effect on the nanoindentation creep behaviors of the CoCrFeNiMn HEA. The creep behaviors of the as-cast and HPT-treated CoCrFeNiMn HEA may be controlled by dislocations and the collective effect of GB sliding and dislocations, respectively.

Authors:
;  [1];  [2]
  1. Yanshan University, State Key Laboratory of Metastable Materials Science and Technology (China)
  2. Central South University, National Key Laboratory of Science and Technology for National Defence on High-strength Structure Materials (China)
Publication Date:
OSTI Identifier:
22970768
Resource Type:
Journal Article
Journal Name:
Journal of Materials Engineering and Performance
Additional Journal Information:
Journal Volume: 28; Journal Issue: 5; Other Information: Copyright (c) 2019 ASM International; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1059-9495
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; CREEP; GRAIN REFINEMENT; GRAIN SIZE; LOADING RATE; TORSION

Citation Formats

Zhou, P. F., Xiao, D. H., E-mail: daihongx@csu.edu.cn, Li, G., and Song, M. Nanoindentation Creep Behavior of CoCrFeNiMn High-Entropy Alloy under Different High-Pressure Torsion Deformations. United States: N. p., 2019. Web. doi:10.1007/S11665-019-04092-1.
Zhou, P. F., Xiao, D. H., E-mail: daihongx@csu.edu.cn, Li, G., & Song, M. Nanoindentation Creep Behavior of CoCrFeNiMn High-Entropy Alloy under Different High-Pressure Torsion Deformations. United States. https://doi.org/10.1007/S11665-019-04092-1
Zhou, P. F., Xiao, D. H., E-mail: daihongx@csu.edu.cn, Li, G., and Song, M. 2019. "Nanoindentation Creep Behavior of CoCrFeNiMn High-Entropy Alloy under Different High-Pressure Torsion Deformations". United States. https://doi.org/10.1007/S11665-019-04092-1.
@article{osti_22970768,
title = {Nanoindentation Creep Behavior of CoCrFeNiMn High-Entropy Alloy under Different High-Pressure Torsion Deformations},
author = {Zhou, P. F. and Xiao, D. H., E-mail: daihongx@csu.edu.cn and Li, G. and Song, M.},
abstractNote = {CoCrFeNiMn high-entropy alloy (HEA) has gained increasing attention in recent years. In this work, CoCrFeNiMn HEA was prepared by arc melting and casting method; and high-pressure torsion (HPT) technology was used to refine the grains. A series of nanoindentation experiments was used to investigate the effect of different loading rates and deformations on the nanoindentation creep behavior of the CoCrFeNiMn HEA. The results show that the grain size of the CoCrFeNiMn HEA refines to the nanoscale after HPT. However, grain refinement is not obvious with further increasing HPT rotation. The loading rate and HPT rotations have an obvious effect on the nanoindentation creep behaviors of the CoCrFeNiMn HEA. The creep behaviors of the as-cast and HPT-treated CoCrFeNiMn HEA may be controlled by dislocations and the collective effect of GB sliding and dislocations, respectively.},
doi = {10.1007/S11665-019-04092-1},
url = {https://www.osti.gov/biblio/22970768}, journal = {Journal of Materials Engineering and Performance},
issn = {1059-9495},
number = 5,
volume = 28,
place = {United States},
year = {2019},
month = {5}
}