TY - JOUR
T1 - Designing High Entropy Alloys with Dual fcc and bcc Solid-Solution Phases
T2 - Structures and Mechanical Properties
AU - Tang, Zhaowu
AU - Zhang, Shang
AU - Cai, Ruipeng
AU - Zhou, Qing
AU - Wang, Haifeng
N1 - Publisher Copyright:
© 2019, The Minerals, Metals & Materials Society and ASM International.
PY - 2019/4/15
Y1 - 2019/4/15
N2 - High entropy alloys (HEAs) with a single fcc phase are usually ductile but not strong, while HEAs with a single bcc phase have high strength but low ductility. Therefore, the combination of fcc and bcc phases was adopted to optimize the mechanical properties. Based on a latest data collection of reported HEAs with a single fcc phase, with dual fcc and bcc phases, and with a single bcc phase, the current work shows that the average valence electron concentration (VEC) and its standard deviation (δVEC) can describe quantitatively phase selection between the fcc and bcc phases in HEAs. Highest (lowest) hardness, highest (lowest) strength, and lowest (highest) ductility were found at the same critical value of VEC* ≈ 6.13 (δVEC* ≈ 0.207), which corresponds to the HEA with a single bcc (fcc) phase. The current work provides some quantitative rules for designing HEAs with dual fcc and bcc phases as well as modulating strength and ductility.
AB - High entropy alloys (HEAs) with a single fcc phase are usually ductile but not strong, while HEAs with a single bcc phase have high strength but low ductility. Therefore, the combination of fcc and bcc phases was adopted to optimize the mechanical properties. Based on a latest data collection of reported HEAs with a single fcc phase, with dual fcc and bcc phases, and with a single bcc phase, the current work shows that the average valence electron concentration (VEC) and its standard deviation (δVEC) can describe quantitatively phase selection between the fcc and bcc phases in HEAs. Highest (lowest) hardness, highest (lowest) strength, and lowest (highest) ductility were found at the same critical value of VEC* ≈ 6.13 (δVEC* ≈ 0.207), which corresponds to the HEA with a single bcc (fcc) phase. The current work provides some quantitative rules for designing HEAs with dual fcc and bcc phases as well as modulating strength and ductility.
UR - http://www.scopus.com/inward/record.url?scp=85061704328&partnerID=8YFLogxK
U2 - 10.1007/s11661-019-05131-1
DO - 10.1007/s11661-019-05131-1
M3 - 文章
AN - SCOPUS:85061704328
SN - 1073-5623
VL - 50
SP - 1888
EP - 1901
JO - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
JF - Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
IS - 4
ER -