|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||2016 Technical Division Student Poster Competition
||SPU-8: Study of Thermomechanical Properties of an Al-Zn Matrix Reinforced with Dodecaboride Particles
||Marivic Hernández-Quezada, José Luis Colón, Sujeily Soto, Oscar Marcelo Suárez
|On-Site Speaker (Planned)
Aluminum-zinc alloys are widely used in the transportation industry due their low weight-to-strength ratio. For those applications, understanding their high temperature behavior is mandatory. This research studied the effect of high temperatures of a composite made of an Al-Zn matrix reinforced with AlB12 particles. These composites were characterized using thermomechanical analysis (TMA), Rockwell hardness, and optical microscopy. The composite samples were homogenized at 500ºC and then quenched. Subsequently, the specimens were studied at 125ºC, 160ºC and 200ºC to simulate an aging treatment. As expected, the composites Rockwell hardness increased for higher concentrations of AlB12 particles. However, such increment was not uniform for all samples at high temperatures, which suggests an interaction between AlB12 and zinc. After the TMA experimentation, optical microscopy revealed Zn precipitation near or at the Al grain boundaries, which led us to discard the potential effect of fine precipitation due to aging in the composites.
||Definite: None Selected