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Title: Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy

Abstract

Elastic moduli of a set of equiatomic alloys (CrFeCoNi, CrCoNi, CrFeNi, FeCoNi, MnCoNi, MnFeNi, and CoNi), which are medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy were determined as a function of temperature over the range 293 K–1000 K. Thermal expansion coefficients were determined for these alloys over the temperature range 100 K–673 K. All alloys were single-phase and had the face-centered cubic (FCC) crystal structure, except CrFeNi which is a two-phase alloy containing a small amount of body-centered cubic (BCC) precipitates in a FCC matrix. The temperature dependences of thermal expansion coefficients and elastic moduli obtained here are useful for quantifying fundamental aspects such as solid solution strengthening, and for structural analysis/design. Furthermore, using the above results, the yield strengths reported in literature for these alloys were normalized by their shear moduli to reveal the influence of shear modulus on solid solution strengthening.

Authors:
ORCiD logo; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1632363
Alternate Identifier(s):
OSTI ID: 1456785
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Published Article
Journal Name:
Journal of Alloys and Compounds
Additional Journal Information:
Journal Name: Journal of Alloys and Compounds Journal Volume: 746 Journal Issue: C; Journal ID: ISSN 0925-8388
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
36 MATERIALS SCIENCE; High entropy alloys; CoCrFeMnNi; Microstructure; Texture; Thermal expansion coefficient; Elastic constants

Citation Formats

Laplanche, G., Gadaud, P., Bärsch, C., Demtröder, K., Reinhart, C., Schreuer, J., and George, E. P. Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy. Netherlands: N. p., 2018. Web. doi:10.1016/j.jallcom.2018.02.251.
Laplanche, G., Gadaud, P., Bärsch, C., Demtröder, K., Reinhart, C., Schreuer, J., & George, E. P. Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy. Netherlands. doi:10.1016/j.jallcom.2018.02.251.
Laplanche, G., Gadaud, P., Bärsch, C., Demtröder, K., Reinhart, C., Schreuer, J., and George, E. P. Tue . "Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy". Netherlands. doi:10.1016/j.jallcom.2018.02.251.
@article{osti_1632363,
title = {Elastic moduli and thermal expansion coefficients of medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy},
author = {Laplanche, G. and Gadaud, P. and Bärsch, C. and Demtröder, K. and Reinhart, C. and Schreuer, J. and George, E. P.},
abstractNote = {Elastic moduli of a set of equiatomic alloys (CrFeCoNi, CrCoNi, CrFeNi, FeCoNi, MnCoNi, MnFeNi, and CoNi), which are medium-entropy subsystems of the CrMnFeCoNi high-entropy alloy were determined as a function of temperature over the range 293 K–1000 K. Thermal expansion coefficients were determined for these alloys over the temperature range 100 K–673 K. All alloys were single-phase and had the face-centered cubic (FCC) crystal structure, except CrFeNi which is a two-phase alloy containing a small amount of body-centered cubic (BCC) precipitates in a FCC matrix. The temperature dependences of thermal expansion coefficients and elastic moduli obtained here are useful for quantifying fundamental aspects such as solid solution strengthening, and for structural analysis/design. Furthermore, using the above results, the yield strengths reported in literature for these alloys were normalized by their shear moduli to reveal the influence of shear modulus on solid solution strengthening.},
doi = {10.1016/j.jallcom.2018.02.251},
journal = {Journal of Alloys and Compounds},
number = C,
volume = 746,
place = {Netherlands},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1016/j.jallcom.2018.02.251

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Cited by: 12 works
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