Microstructural and mechanical anisotropy of extruded in-situ TiB2/2024 composite plate

The influence of crystallographic texture, grain shape and TiB2 particle distribution on the mechanical anisotropy with respect to three-dimensional directions of in-situ TiB2/2024 composite plate has been investigated. The grains of the composite are strongly elongated along extrusion direction (ED). Most of TiB2 particles are aligned along the long grain axis in both ED-TD (TD: transverse direction) and ED-ND (ND: normal direction) planes to form the particle bands. In the concerned three directions, the yield/ultimate tensile strength and elongation are all increasing in the directional sequence of ND