Abstract
The tool steel matrix composite was successfully produced by a novel infiltration method so as to have TiC reinforcement particles more than 57vol.%. The interface between α-Fe and TiC was found to be semi-coherent nature and the orientation relationship was clearly confirmed, i.e. [012]α-Fe//[110]TiC, (200)α-Fe//2¯24TiC. Tensile fractures consisted mainly of {100} microcleavage of TiC grains with no interfacial decohesion. The increased strength of the composite at 700°C is rationalized in terms of mutually interactive influences of load transfer mechanism and the matrix strengthening resulted from the increased density of dislocations.
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