Effects of Nano TiC Particles on Recrystallization and Mechanical Properties of Al-Zn-Mg-Cu Alloy

Abstract

The recrystallization and mechanical properties of 7085 alloy and TiC/7085 composites with different nano TiC content (0.1, 0.3, 0.5, and 1 wt%) were investigated in this work. Results showed that as the TiC content increased from 0.1 to 1 wt%, dynamic recrystallization was promoted in which the composites proceeded by hot deformation; after T6 treatment, static recrystallization was hindered. In addition, the ultimate strength of composites first increased and then decreased with the increase of nano TiC particle content from 0.1 wt% to 1 wt%. When the content of nano TiC particles reached 0.5 wt%, the tensile strength of the nanocomposites was improved to 608 MPa, 12% higher than that of 7085 alloy, via the reinforcing particle strengthening mechanism. Due to the grain coarsening and the TiC particle cluster, the ultimate tensile strength of 1 wt% TiC/7085 composite decreased to 585 MPa.

Microstructure evolution and mechanical properties of friction stir processed TiC/7085Al nanocomposites

“…In this paper, the 0.5 wt.% TiC/7085Al nanocomposite was fabricated through in situ casting method. The related details can refer to [25]. The ingots were cut into the plates with size of 140 mm×80 mm×8 mm by wire cut electrical discharge machining (WEDM) and then subjected to FSP.…”

Effect of Heat Treatment Temperatures on Microstructure and Mechanical Properties of Continuous Casting and Rolling Al-Mg Alloy

“…In order to increase the plastic deformation ability of the alloy, heat treatment is often used to eliminate the stress concentration problem, to reduce the strength of the alloy and to improve the plasticity of the alloy. The deformed Al alloy will undergo recovery and recrystallization during heat treatment, which will affect the mechanical properties of the alloy [6][7][8]. For example, Wang et al [9] studied the distribution uniformity of the second-phase particles of Al-Mg-Si-Cu alloy after heat treatment and its effect on mechanical properties.…”