Abstract
In-situ 3 wt.%TiB2/6061 composites were fabricated by the reaction of Al-K2TiF6-KBF4. The effects of 0.3 wt.% Mn addition on the microstructure evolution and properties improvement of the composites were investigated. The in-situ synthesized TiB2 particles were distributed more evenly in the composites and the grains of the composites were refined obviously by trace Mn addition. Compared with the composites without Mn in as cast and T6 state, the UTS and YS of the composites with 0.3 wt.% Mn were increased by 10.6%, 13.6% and 26.7%, 23.4%, respectively, which due to the distribution improvement, size decrease and morphology changing of TiB2 particles. The T6 state in-situ 0.3 wt.%Mn-3 wt.%TiB2/6061 presents excellent corrosion resistance properties.
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