TY - JOUR
T1 - CoCrFeMnNi high-entropy alloys reinforced with Laves phase by adding Nb and Ti elements
AU - Qin, Gang
AU - Li, Zibo
AU - Chen, Ruirun
AU - Zheng, Huiting
AU - Fan, Chenlei
AU - Wang, Liang
AU - Su, Yanqing
AU - Ding, Hongsheng
AU - Guo, Jingjie
AU - Fu, Hengzhi
N1 - Publisher Copyright:
Copyright © Materials Research Society 2019.
PY - 2019/3/28
Y1 - 2019/3/28
N2 - Laves phase plays a positive role in improving the strength of high-entropy alloys (HEAs); Nb and Ti elements have potential to promote Laves phase formation in some HEAs. For improving the strength of the face-centered cubic (FCC) CoCrFeMnNi HEA, a series of (CoCrFeMnNi)100-xNbx (atomic ratio: x = 0, 4, 8, 12, 16) and (CoCrFeMnNi)100-xTix (atomic ratio: x = 0, 2, 4, 6, 8, 12) HEAs were prepared by melting. The effects of Nb and Ti on the microstructure evolution and compressive properties of the CoCrFeMnNi HEAs were investigated. For (CoCrFeMnNi)100-xNbx HEAs, the second-phase (Laves and σ phase) volume fraction increased from 0 to 42%. The yield strength also increased gradually from 202 to 1010 MPa. However, the fracture strain decreased from 60% (no fracture) to 12% with increasing Nb content. For (CoCrFeMnNi)100-xTix HEAs, the yield strength increased from 202 to 1322 MPa. The Laves phase volume fraction also increased from 0 to 27%. However, the fracture strain decreased from 60% (no fracture) to 7.5% with increasing Ti content. Addition of Nb and Ti has a good effect on improving the strength of FCC CoCrFeMnNi HEA.
AB - Laves phase plays a positive role in improving the strength of high-entropy alloys (HEAs); Nb and Ti elements have potential to promote Laves phase formation in some HEAs. For improving the strength of the face-centered cubic (FCC) CoCrFeMnNi HEA, a series of (CoCrFeMnNi)100-xNbx (atomic ratio: x = 0, 4, 8, 12, 16) and (CoCrFeMnNi)100-xTix (atomic ratio: x = 0, 2, 4, 6, 8, 12) HEAs were prepared by melting. The effects of Nb and Ti on the microstructure evolution and compressive properties of the CoCrFeMnNi HEAs were investigated. For (CoCrFeMnNi)100-xNbx HEAs, the second-phase (Laves and σ phase) volume fraction increased from 0 to 42%. The yield strength also increased gradually from 202 to 1010 MPa. However, the fracture strain decreased from 60% (no fracture) to 12% with increasing Nb content. For (CoCrFeMnNi)100-xTix HEAs, the yield strength increased from 202 to 1322 MPa. The Laves phase volume fraction also increased from 0 to 27%. However, the fracture strain decreased from 60% (no fracture) to 7.5% with increasing Ti content. Addition of Nb and Ti has a good effect on improving the strength of FCC CoCrFeMnNi HEA.
KW - high-entropy alloys
KW - laves phase
KW - mechanical properties
KW - phase selection
UR - http://www.scopus.com/inward/record.url?scp=85060224360&partnerID=8YFLogxK
U2 - 10.1557/jmr.2018.468
DO - 10.1557/jmr.2018.468
M3 - Article
AN - SCOPUS:85060224360
SN - 0884-2914
VL - 34
SP - 1011
EP - 1020
JO - Journal of Materials Research
JF - Journal of Materials Research
IS - 6
ER -