Open AccessEffect of Cr on microstructures and properties of AlTiVZr0.2Crx light weight high entropy alloys
Author(s) -
Yongqi Wang,
An-Min Li,
Shanjun Wei,
Yu Wu,
Chang Wang
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1820/1/012096
Subject(s) - materials science , microstructure , alloy , intermetallic , solid solution , metallurgy , powder metallurgy , high entropy alloys , solid solution strengthening , elastic modulus , young's modulus , composite material
AlTiVZr 0.2 Cr x (x=0,0.4,1) high entropy alloys have been prepared by powder metallurgy technology, and the effects of Cr content on the microstructures and properties of the alloys have been studied. The results show that the AlTiVZr 0.2 Cr x alloys are mainly composed of body-centered cubic solid solution (BCC), face-centered cubic solid solution (FCC), and Al 2 Zr, AlTi 2 and Cr 2 Ti intermetallic compounds. The addition of Cr promotes the transformation of the alloys from FCC structure to BCC structure and generate new phase Cr 2 Ti. The microstructure of the alloys are mainly massive or granulate. The hardness, compressive strength and elastic modulus of AlTiVZr 0.2 Cr x alloys increase with the increase of atomic ratio of Cr content, the maximum hardness of AlTiVZr 0.2 Cr alloy is 685.3 HV, and the maximum compressive strength and elastic modulus are 1180.36 MPa and 30221.36 MPa respectively. The addition of Cr content also affects the friction coefficient and wear resistance of the alloys. With the addition of Cr, the friction coefficient and wear resistance increase first and then decrease. The wear resistance of the AlTiVZr 0.2 Cr 0.4 alloy is the best in this experiment.