Sliding wear behaviour of T6 treated A356–TiB2 in-situ composites

Abstract Dry sliding wear behaviour of A356–TiB 2 composites in T6 condition was tested using a pin-on-disc wear testing machine. The composites were prepared by the reaction of a mixture of K 2 TiF 6 and KBF 4 salts with molten alloy. The wear tests were conducted at normal loads of 19.6–78.4 N and a sliding speed of 1 ms −1 . A detailed SEM study of wear surface and debris was carried out to substantiate the wear results. The results indicate that wear rate of the composites is a strong function of TiB 2 content rather than overall hardness of the composite. The role of Si and TiB 2 particles towards the overall mechanism has been discussed.

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