Microstructure and mechanical properties of in-situ TiCp/2024 composite

The microstructure of TiCp/2024 composite and the structure of interface be tween TiCp and Al are studied using SEM and TEM. The results show that the in-situ synthesized TiC particle has face-centered cubic structure (fcc). M eanwhile, particles are characterized as tiny and nearly globular. The orie ntation between TiC particles and Al matrix can be described as ((2) over b ar(2) over bar0)(Al)//(02 (2) over bar)(Tic) and [(1) over bar 12](Al)//[01 1](TiC). Results of the mechanical property tests reveal that the ultimate strength (sigma (b)) and the yield strength (sigma (s)) of the composite ar e improved by 30% and 47% respectively, compared with the properties of 202 4 matrix. In addition, the elongation (delta) value can still reach 4.3%. T hus TiCp/2024 composite has high comprehensive performance.