Abstract

Rapid solidification processing (RSP) of Ti-B alloys, with accompanying large undercoolings and high cooling rates, has been proven to be very effective for producing in-situ titanium composites containing very large volume fractions of reinforcing second-phase particles reminiscent of filaments or whiskers used in metal matrix composites. The reinforcing dispersoids are formed in-situ in Ti-B alloys either upon solidification or subsequently by the controlled decomposition of the supersaturated solid solutions. The reinforcements are typically 100-1000 nm in diameter and 1-10 μm long, and they produce significant strength and modulus increases.

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