Developing aluminum matrix composites through microstructure optimization and particle reinforcement via ARB and cryorolling

Abstract

Aluminum matrix composites (AMCs) reinforced with titanium carbide (TiC) particles were fabricated through accumulative roll bonding (ARB) and cryorolling. This study explores the effect of ARB temperatures (373 ​K, 473 ​K, 623 ​K, and 723 ​K) on the dispersion of TiC particles, followed by cryorolling to assess the influence on mechanical properties. This research also focuses on the TiC-Al interface, as its bonding strength plays a significant role in composite performance. Microstructural analyses using SEM, EDS, and TEM revealed that ARB processing at 623 ​K followed by cryorolling resulted in the most homogeneous TiC distribution and optimal interface bonding, leading to significant improvements in mechanical properties. The study emphasizes the importance of controlling processing temperature and cycles to achieve a uniform dispersion of TiC particles and maintain an effective interface between TiC and the aluminum matrix. While lower ARB temperatures (373 ​K and 473 ​K) resulted in particle clustering, higher ARB temperatures (723 ​K) caused grain coarsening, leading to suboptimal strengthening. This research provides new insights into tailoring processing conditions to enhance both microstructure and mechanical performance of TiC-reinforced AMCs for advanced engineering applications.