Effect of nano-sized TiC on microstructure and propertits of Al-Cu alloy

doi:10.13251/j.issn.0254-6051.2023.03.046

Abstract

Abstract: Effects of nano-sized TiC particles on the microstructure of the Al-Cu alloy at as-cast, as-rolled, and heat-treated states and on the mechanical properties after heat treatment were studied. The results show that the microstructure of the alloy can be effectively refined by adding appropriate nano-TiC particles. When the TiC content is small, with the increase of TiC content, the alloy undergoes dynamic recrystallization during rolling deformation, and the average grain size decreases. When the TiC content exceeds 0.5% (mass fraction), the recrystallized grains gradually grow and coarsen. When the content of nano-TiC is 0.5%, the comprehensive properties of the alloy are the best. Compared with the matrix, the tensile strength and elongation increase by 18.6% and 7% respectively. During heat treatment, precipitates and a large number of dislocations are produced in the TiC/Al-Cu alloy, which is helpful to improve the mechanical properties of the material.

Key words: nano-sized TiC, Al-Cu alloy, microstructure, mechanical properties

CLC Number:

TG146.2

Lu Yalin, Huang Yong, Wang Jian. Effect of nano-sized TiC on microstructure and propertits of Al-Cu alloy[J]. Heat Treatment of Metals, 2023, 48(3): 275-279.

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