The grain refinement of aluminium by a new as-cast Al-Ti-TiCN composite

被引：1
作者：
Yang, Wen [1 ]
Tang, Zhenghua [1 ]
Yuan, Mingwan [2 ]
Sun, Weijian [1 ]
Xiao, Sufen [1 ]
机构：
[1] Sichuan Univ, Dept Mat Sci & Engn, Chengdu 610000, Peoples R China
[2] Sichan Lande High Tech Ind Co Ltd, Xindu, Peoples R China
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2021年 / 37卷 / 05期
关键词：
Grain refinement; Ti; TiCN; aluminium; nucleations; as-cast; refiner; free growth theory; growth restriction factor; C MASTER ALLOY; MECHANICAL-PROPERTIES; REFINING MECHANISM; MICROSTRUCTURE; PARTICLES; TITANIUM; MODEL; SITU; WC;
D O I：
10.1080/02670836.2021.1917835
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new type of composite refiner Ti/TiCN is prepared by loading submicron-TiCN particles onto Ti micron-particles and added to industrial pure aluminium. Refining mechanism has been characterised in detail by optical microscopy, scanning electron microscopy and transmission electron microscopy coupled with energy disperse X-ray spectra. These experimental results show that Ti/TiCN inoculation is more effective in refining pure aluminium than Ti and TiCN added separately. The relationship between grain size and growth restriction factors of aluminium matrix containing Ti/TiCN refiner is d = 70.2 + 1190.8/Q. According to the free growth theory, aluminium matrix with Ti/TiCN inoculation has the largest solidification driving force to promote grain nucleation under the same growth restriction factors (Q = 0.5,1, 5, 12, 20 K) compared to Ti and TiCN refiners.
引用
收藏
页码：495 / 503
页数：9
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