Microstructure and grain refining performance of a new Al–Ti–C–B master alloy |
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Authors: | Jinfeng Nie Xiaoguang Ma Haimin Ding Xiangfa Liu |
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Affiliation: | aKey Laboratory for Liquid–Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan 250061, PR China |
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Abstract: | A kind of Al–Ti–C–B master alloy with a uniform microstructure is prepared using a melt reaction method. It is found that the average grain size of α-Al can be reduced from 3500 to 170 μm by the addition of 0.2 wt.% of the prepared Al–5Ti–0.3C–0.2B and the refining efficiency does not fade obviously within 60 min. It is considered that the TiCxBy and TiB2−mCn particles found at the grain center are the effective and stable nucleating substrates for α-Al during solidification, which accounts for the good grain refining performance. |
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Keywords: | Aluminum alloy Al– Ti– C– B master alloy Microstructure Grain refinement Nucleation |
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