期刊
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
卷 33, 期 7, 页码 616-622出版社
JOURNAL MATER SCI TECHNOL
DOI: 10.1016/j.jmst.2017.04.015
关键词
Al alloys; Nucleation Grain refinement; TiCx
资金
- National Natural Science Fund of China [51501092]
- National Basic Research Program of China [2012CB825702]
TiCx contained Al-Ti-C is a kind of grain refiner for Al alloys. In this work, the influence of C/Ti stoichiometry, i.e. the x value in TiCx on grain refinement efficiency was investigated. TiCx particles have been obtained in five Al-5Ti-mC (m= 0.1, 0.5, 0.8, 1, 1.25) master alloys and the x values were measured to be 0.72, 0.75, 0.79, 0.81and 0.8, respectively. It was found that the refinement performance of the master alloys had a close relationship with the x value of TiCx. The Al-5Ti-mC alloy with lower-x TiCx shows better refinement efficiency and anti-fading capability. It is supposed that TiCx particles with lower x are more preferred to release Ti atoms during nucleating process and have a better Ti-absorbing capability. This contributes to the Ti-rich zone formation at TiCx/melt interface, thus enhancing the refinement and anti-fading capability. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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