Mojtaba Bagherzadeh - MSc. Student inMaterials Engineering-Casting, Sahand University of Technology
Rasoul Azari Khoroshahi - Associate Professor in Materials Engineering Department, Sahand University
Massoud Emamy - Professor in School of Materials Science and Engineering, Tehran University

In this research, the effects of B addition and hot extrusion on the microstructure and tensile properties of an in-situ Al-20 wt.% MgSi composite have been investigated. Adding 0.5 wt.% B to the composite reduced the average size of MgSi primary particles from 70 μm to 45 μm. Hot extrusion was carried out at 480, with ratio of 12:1 and ram speed of 1mm⁄s. Further refinement of primary MgSi particles was observed after applying hot extrusion process. The observed increase in tensile strength and elongation values of the Al-20 wt.% MgSi composite was due to the microstructural refinement after hot extrusion process.

Boron, Hot extrusion, Composite, Modification