Grain refinement of Al-5Ti-0.62C-0.2Nd grain refiner for commercial pure aluminum and its effect on mechanical properties

被引：0
作者：
Ding W. [1 ,2 ]
Li C. [1 ,2 ]
Chen T. [1 ,2 ]
Zhao W. [1 ,2 ]
Guo T. [1 ,2 ]
Qiao J. [1 ,2 ]
Xia T. [1 ,2 ]
机构：
[1] State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou, Gansu
[2] School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, Gansu
来源：
Materials Research | 2019年 / 22卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Al-5Ti-0.62C-0.2Nd grain refiner; Commercial pure aluminum; Grain refinement; Mechanical properties;
D O I：
10.1590/1980-5373-mr-2018-0302
中图分类号：
学科分类号：
摘要：
It is well known that the mechanical properties of commercial pure Al are influenced by size of α-Al dendrites. In the present work, Al-5Ti-0.62C-0.2Nd grain refiner was prepared by a pure molten aluminum thermal explosion reaction, and its effect on grain refinement and mechanical properties of commercial pure Al was investigated. Microstructure and phase composition show that Al-5Ti-0.62C-0.2Nd grain refiner consists of α-Al, granular TiC, lump-like TiAl3, and block-like Ti2Al20Nd. Grain-refining tests on commercial pure Al show that an Al-5Ti-0.62C-0.2Nd grain refiner has better refining performance compared with Al-5Ti-0.62C grain refiner. With addition of 0.2-wt.%-Al-5Ti-0.62C-0.2Nd grain refiner, the average grain size of commercial pure Al can be refined from roughly 2800 to 155±5 µm effectively, and it has higher resistance to grain-refinement fading. On account of the grain refinement, the tensile strength and elongation are increased by approximately 18.3% and 83.5%, respectively. © 2019 Universidade Federal de Sao Carlos. All rights reserved.
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  • [1] Wang TM, Chen ZN, Fu HW, Gao L, Li T., Grain refinement mechanism of pure aluminum by inoculation with Al-B master alloys, Materials Science and Engineering: A, 549, pp. 136-143, (2012)
  • [2] Gezer BT, Toptan F, Daglilar S, Kerti I., Production of Al-Ti-C grain refiners with the addition of elemental carbon, Materials & Design, 31, pp. S30-S35, (2010)
  • [3] Zhao HL, Yue JS, Gao Y, Weng KR., Grainanddendriterefinement of A356 alloy with Al-Ti-C-RE master alloy, Rare Metals, 32, 1, pp. 12-17, (2013)
  • [4] Liu XF, Bian XF, Qi XG, Thompson M, Ma JJ., Study of the nucleation mechanism of a-Al grains after addition of Al-Ti-B master alloys, Acta Metallurgica Sinica (English Letters), 11, 3, pp. 157-162, (1998)
  • [5] Vinod Kumar GS, Murty BS, Chakraborty M., Development of Al-Ti-C grain refiners and study of their grain refining efficiency on Al and Al-7Si alloy, Journal of Alloys and Compounds, 396, 1-2, pp. 143-150, (2005)
  • [6] Lu L, Dahle AK., Effect of combined additions of Sr and AlTiB grain refiners in hypoeutectic Al-Si foundry alloys, Materials Science and Engineering: A, 435-436, pp. 288-296, (2006)
  • [7] Moldovan P, Popescu G., Thegrainre?nementof6063aluminium using Al-5Ti-1B and Al-3Ti-0.15C grain re?ners, JOM, 56, 11, pp. 59-61, (2004)
  • [8] Nie JF, Ma XG, Li PT, Liu XF., Effect of B/C ratio on the microstructureandgrainrefiningefficiencyofAl-Ti-C-Bmaster alloy, JournalofAlloysandCompounds, 509, 4, pp. 1119-1123, (2011)
  • [9] Tian WJ, Li PT, Gao T, Nie JF, Liu XF., Transformation from Al3BC phase to doped TiB2 or TiC particles in Al-Ti melts, Journal of Alloys and Compounds, 561, pp. 48-53, (2013)
  • [10] Li PT, Ma XG, Li YG, Nie JF, Liu XF., Effects of trace C addition on the microstructure and refining efficiency of Al-Ti-B master alloy, Journal of Alloys and Compounds, 503, 2, pp. 286-290, (2010)
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