| 학회 |
한국재료학회 |
| 학술대회 |
2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 |
23권 2호 |
| 발표분야 |
15. 고엔트로피합금의 개발 및 미래 전략 심포지엄 |
| 제목 |
Al0.5CoCuCrFeNiTix High entropy alloys prepared by mechanical alloying and spark plasma sintering |
| 초록 |
High-entropy alloys (HEAs), which are equiatomic (or near-equiatomic) multi-component alloys with high mixing entropies, opened a new paradigm of alloy design due to their unique compositions and exceptional properties. Among a variety of HEAs, CoCrCuFeNi HEA with a FCC single phase has attracted interest as promising structural materials in transportation fields because of its high specific strength and good forming ability. The addition of Al to this alloy results in enhancement of specific strength of the alloy due to the low density of Al as well as significant lattice distortion induced by large difference in atomic size. Furthermore, when x exceeds 0.5 in AlxCoCrCuFeNi alloys, BCC phase is formed and this further increases the strength of the alloys. Although the effect of the composition on microstructures and resulting properties have been widely investigated for cast HEAs, powder metallurgy (PM) HEAs have been less highlighted. Herein, we produced Al0.5CoCrCuFeNiTix (x = 0, 1, 2) HEAs using a powder metallurgy route, and investigated the Ti addition effect on microstructure and mechanical properties of the alloys. This work aims to produce high-strength light-weight HEAs and to investigate strengthening mechanism with consideration of microstructural features. |
| 저자 |
Seungjin Nam1, Jonggyu Jeon2, Heyjin Lim3, Hyunjoo Choi4
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| 소속 |
1Dept. of Advanced Materials Engineering, 2Kookmin Univ., 3Seoul, 4Republic of Korea |
| 키워드 |
<P>High-entropy alloy; Powder metallurgy; Microstructure; Mechanical alloying; Spark plasma sintering; Mechanical properties</P>
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| E-Mail |
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