The BCC/B2 morphologies in AlxNiCoFeCr high-entropy alloys
Abstract
The present work primarily investigates the morphological evolution of the body-centered-cubic (BCC)/B2 phases in AlxNiCoFeCr high-entropy alloys (HEAs) with increasing Al content. It is found that the BCC/B2 coherent morphology is closely related to the lattice misfit between these two phases, which is sensitive to Al. There are two types of microscopic BCC/B2 morphologies in this HEA series: one is the weave-like morphology induced by the spinodal decomposition, and the other is the microstructure of a spherical disordered BCC precipitation on the ordered B2 matrix that appears in HEAs with a much higher Al content. The mechanical properties, including the compressive yielding strength and microhardness of the AlxNiCoFeCr HEAs, are also discussed in light of the concept of the valence electron concentration (VEC).
- Authors:
-
- Dalian Univ. of Technology, Dalian (China)
- The Univ. of Tennessee, Knoxville, TN (United States)
- Guilin Univ. of Electronic Technology, Guilin (China)
- Publication Date:
- Research Org.:
- Univ. of Tennessee, Knoxville, TN (United States)
- Sponsoring Org.:
- USDOE Office of Fossil Energy (FE)
- OSTI Identifier:
- 1356091
- Alternate Identifier(s):
- OSTI ID: 1362287
- Grant/Contract Number:
- FE0008855
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Metals
- Additional Journal Information:
- Journal Volume: 7; Journal Issue: 2; Journal ID: ISSN 2075-4701
- Publisher:
- MDPI
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; high-entropy alloys; Al-Ni-Co-Fe-Cr alloys; microstructure; precipitation morphology; mechanical property
Citation Formats
Ma, Yue, Jiang, Beibei, Li, Chunling, Wang, Qing, Dong, Chuang, Liaw, Peter K., Xu, Fen, and Sun, Lixian. The BCC/B2 morphologies in AlxNiCoFeCr high-entropy alloys. United States: N. p., 2017.
Web. doi:10.3390/met7020057.
Ma, Yue, Jiang, Beibei, Li, Chunling, Wang, Qing, Dong, Chuang, Liaw, Peter K., Xu, Fen, & Sun, Lixian. The BCC/B2 morphologies in AlxNiCoFeCr high-entropy alloys. United States. https://doi.org/10.3390/met7020057
Ma, Yue, Jiang, Beibei, Li, Chunling, Wang, Qing, Dong, Chuang, Liaw, Peter K., Xu, Fen, and Sun, Lixian. Wed .
"The BCC/B2 morphologies in AlxNiCoFeCr high-entropy alloys". United States. https://doi.org/10.3390/met7020057. https://www.osti.gov/servlets/purl/1356091.
@article{osti_1356091,
title = {The BCC/B2 morphologies in AlxNiCoFeCr high-entropy alloys},
author = {Ma, Yue and Jiang, Beibei and Li, Chunling and Wang, Qing and Dong, Chuang and Liaw, Peter K. and Xu, Fen and Sun, Lixian},
abstractNote = {The present work primarily investigates the morphological evolution of the body-centered-cubic (BCC)/B2 phases in AlxNiCoFeCr high-entropy alloys (HEAs) with increasing Al content. It is found that the BCC/B2 coherent morphology is closely related to the lattice misfit between these two phases, which is sensitive to Al. There are two types of microscopic BCC/B2 morphologies in this HEA series: one is the weave-like morphology induced by the spinodal decomposition, and the other is the microstructure of a spherical disordered BCC precipitation on the ordered B2 matrix that appears in HEAs with a much higher Al content. The mechanical properties, including the compressive yielding strength and microhardness of the AlxNiCoFeCr HEAs, are also discussed in light of the concept of the valence electron concentration (VEC).},
doi = {10.3390/met7020057},
journal = {Metals},
number = 2,
volume = 7,
place = {United States},
year = {2017},
month = {2}
}
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