Microstructure, mechanical property and Hall-Petch relationship of a light-weight refractory Al0.1CrNbVMo high entropy alloy fabricated by powder metallurgical process
| Autor: | Jun Ho Lee, Soon Hyung Hong, Byungchul Kang, Ho Jin Ryu |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Mechanical property Materials science Mechanical Engineering Metallurgy Alloy Metals and Alloys Spark plasma sintering 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Superalloy Mechanics of Materials 0103 physical sciences Materials Chemistry engineering 0210 nano-technology Ball mill Refractory (planetary science) Grain boundary strengthening |
| Zdroj: | Journal of Alloys and Compounds. 767:1012-1021 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2018.07.145 |
| Popis: | 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 μ m 0.5. |
| Databáze: | OpenAIRE |
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