Microstructure, mechanical property and Hall-Petch relationship of a light-weight refractory Al0.1CrNbVMo high entropy alloy fabricated by powder metallurgical process

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A light-weight refractory Al0.1CrNbVMo high entropy alloy (HEA) was fabricated by high energy ball milling and spark plasma sintering (SPS). The alloy had a density of 7.96 g/cm3, which is lower than that of conventional Ni-base superalloys. Optimum milling time was decided by the microstructure analysis of the HEA powders. The microstructure of the bulk alloy consisted of a body-centered cubic (BCC) matrix with a minor amount of alumina inclusions. The Al0.1CrNbVMo HEA exhibited outstanding compressive mechanical properties of 2863 MPa at room temperature, and 1405 MPa at 1000 °C, respectively. The specific yield strength of 176 MPa cm3/g at 1000 °C, is much higher than that of the other refractory HEAs. The Hall-Petch coefficient of the Al0.1CrNbVMo alloy was derived to 811 MPa μm0.5.
Publisher
ELSEVIER SCIENCE SA
Issue Date
2018-10
Language
English
Article Type
Article
Keywords

HIGH-TEMPERATURE DEFORMATION; SOLID-SOLUTION PHASE; STRENGTHENING MECHANISMS; MULTICOMPONENT ALLOYS; INTERMETALLIC PHASES; TENSILE PROPERTIES; BEHAVIOR; STABILITY; DUCTILITY; ELEMENT

Citation

JOURNAL OF ALLOYS AND COMPOUNDS, v.767, pp.1012 - 1021

ISSN
0925-8388
DOI
10.1016/j.jallcom.2018.07.145
URI
http://hdl.handle.net/10203/245387
Appears in Collection
NE-Journal Papers(저널논문)MS-Journal Papers(저널논문)
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