Microstructure and Tensile Properties of Al3Ti/Al-Si-Cu-V-Zr Alloy Composites
ZENG Guangkai1, CUI Junge1, WANG Yuchen1, CHEN Kailun1, PAN Senxin1, PAN Liwen1,2,3,HU Zhiliu1,2,3
1 School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China 2 Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials, Nanning 530004, China 3 Guangxi Eco-type Aluminum Industry Collaborative Innovation Center, Nanning 530004, China
Abstract: In this work, K2TiF6 salt was added into the Al-Si-Cu-V-Zr alloy melt, and the Al3Ti strengthening phases of different contents were introduced into Al-Si-Cu-V-Zr alloy through the melting in-situ reaction method. The microstructure and mechanical properties of the as-cast xAl3Ti/Al-Si-Cu-V-Zr composite were studied. The results showed that the composite was composed of α-Al, eutectic Si, Al2Cu and (Al,Si)3M((Al,Si)3-(Zr,V), (Al,Si)3(Ti,Zr,V)) phases. With the addition of K2TiF6 salt increasing, the (Al,Si)3M phase changed from strip to equiaxed particle, and the α-Al phase turned more fine and the strip eutectic silicon changed into the fine short fiber. The aspect ratio of eutectic silicon and the ave-rage particle size of (Al,Si)3M phase decreased with K2TiF6 salt addition increasing. The tensile properties of aluminum matrix composites were improved after introducing (Al,Si)3M reinforcing phase. The tensile strength and yield strength of composites containing 6wt%Al3Ti were 239.3 MPa and 85.3 MPa, respectively, 28.6% and 28.8% higher than those of the matrix alloys. It was found that the Al3Ti phase in the residual liquid phase indirectly refined the eutectic silicon by refining the α-Al in the eutectic structure. Fine and short fiber eutectic silicon reinforcement and fine (Al,Si)3M particle reinforcement were the main reasons for the improvement of the mechanical properties of the composites, while coarse (Al,Si)3M brittle phase was harmful to the improvement of mechanical properties.
1 Wang X, Jha A, Brydson R. Materials Science and Engineering: A,2004,364(1-2),339. 2 Jing S, Wang X Q, Yan C, et al. Transactions of Nonferrous Metals Society of China,2020,30(5),1148. 3 Pan L, Tang J, Lin W, et al. Materials Reports A:Review Papers,2015,29(8),2(in Chinese). 潘利文,唐景凡,林维捐,等.材料导报:综述篇,2015,29(8),2. 4 Yang C, Liu Z, Zheng Q, et al. Journal of Alloys and Compounds,2018,747,580. 5 Birol Y. Journal of Alloys and Compounds,2009,478,265. 6 Chen G, Jin Y, Zhang H, et al. Materials Science and Engineering: A,2018,724,181. 7 Liu Z, Wang X, Han Q, et al. Powder Technology,2014,253,751. 8 Ma S, Wang Y, Wang X. Journal of Alloys and Compounds,2019,792,365. 9 Murray J, Mcalister A. Bulletin of Alloy Phase Diagrams,1984,5(1),74. 10 Lee K, Kwon Y N, Lee S. Journal of Alloys and Compounds,2008,461(1-2),533. 11 Wang Q, Caceres C, Griffiths J. Metallurgical and Materials Transactions A,2003,34(12),2901. 12 Caceres C, Griffiths J. Acta Materialia,1996,44(1),25. 13 Sun J, Zeng G K, Rao D W, et al. Metals and Materials International, 2021, DOI.org/10.1007/s12540-020-00909-0. 14 Mohamed A, Samuel F. Materials Science and Engineering: A,2013,577,66. 15 Shaha S, Czerwinski F, Kasprzak W, et al. Thermochimica Acta,2014,595,12. 16 Hurtalová L, Tillová E, Chalupová M. Archive of Mechanical Enginee-ring,2012,59(4),387. 17 Bian Y, Gao T, Li Z, et al. Materials Science and Engineering: A,2019,762,6. 18 Lee H M, Lee J, Lee Z H. Scripta Metallurgica,1991,25,1. 19 Hansen S C, Loper C R. Calphad-computer Coupling of Phase Diagrams & Thermochemistry,2000,24(3),343. 20 Schuster J C, Palm M. Journal of Phase Equilibria & Diffusion,2006,27(3),255. 21 Cui Z Q, Qin Y C. Metallurgy and heat treatment, China Machine Press, China,2007(in Chinese). 崔忠圻,覃耀春.金属学与热处理,机械工业出版社,2007. 22 Shaha S K, Czerwinski F, Kasprzak W, et al. Materials & Design,2014,59,352.
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2022, Vol. 36 
