|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||Size Effect of Si Particles on the Microstructure and Mechanical Properties of Near Eutectic Al-Si Alloy during Hot Deformation
||Yuna Wu, Hengcheng Liao, Haichao Xu
|On-Site Speaker (Planned)
The present study investigates the size effect of Si particles on the microstructure and mechanical properties of near eutectic Al-Si alloy during hot extrusion. Three sizes of Si particles were studied, the average equivalent diameters of which are 1.7 μm, 4.4 μm and 8.2 μm respectively. The three kinds of samples were all extruded at 510 oC with an extrusion ratio of 16:1. Optical microscopy (OM), scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) were used to characterize the microstructure evolution, and tensile properties were tested. Results show that dynamic recrystallization is weakened with the average equivalent diameter of the Si particles increasing. Tensile tests exhibit that S1 alloy has the highest ultimate tensile strength (UTS) and yield strength (YS), which are 187 MPa and 110 MPa respectively, and the elongation reaches about 22.8%. The quality index of S1 alloy is also the best.
||Planned: Light Metals