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Korean Journal of Metals and Materials > Volume 54(11); 2016 > Article
Korean Journal of Metals and Materials 2016;54(11): 802-807. doi: https://doi.org/10.3365/KJMM.2016.54.11.802
Ti40Zr10Cu36Pd14 비정질기지 복합재의 미세조직과 기계적 특성에 미치는 냉각속도의 영향
박선용1,2, 임가람1, 나영상1,*, 김승언1, 최윤석2
1재료연구소 금속재료연구본부
2부산대학교 재료공학과
The Effects of Cooling Rate on the Microstructure and Mechanical Properties of Ti40Zr10Cu36Pd14 Metallic Glass Matrix Composites
Seon Yong Park1,2, Ka Ram Lim1, Young Sang Na1,*, Seong Eon Kim1, Youn Suk Choi2
1Metallic Materials Division, Korea Institute of Materials Science, Changwon 51508, Republic of Korea
2School of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
Correspondence  Young Sang Na ,Tel: +82-55-280-3377, Email: nys1664@kims.re.kr
Received: 22 April 2016;  Accepted: 25 May 2016.  Published online: 5 November 2016.
ABSTRACT
In this paper, we demonstrate that the microstructure and mechanical properties in the Ti40Zr10Cu36Pd14 alloy can be tailored by controlling the cooling rate during solidification. A lower cooling rate increases the volume fraction of crystalline phase such as B2 but decreases the free volume of the glassy matrix. The increase of the B2 volume fraction can dramatically enhance the toughness of the composites, since the B2 phase is relatively ductile compared to the glassy matrix and seems to have good interface stability with the matrix. From the experimental results, it was found that there is a transition point in the plasticity of the composites depending on the cooling rate. Here, we explain how the toughness of the composites varies in accordance with the cooling rate in the Ti40Zr10Cu36Pd14 alloy system.
Keywords: metallic glass matrix composite, cooling rate, B2 phase, microstructure, mechanical properties
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