|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Aluminum Alloys, Processing and Characterization
||Grain Refinement of Al–Si–Mg Cast Alloys by Al3Ti3B Master Alloy
||Xixi Dong, Shouxun Ji
|On-Site Speaker (Planned)
The requirements of lightweighting structures drive the improvement of mechanical properties of cast Al–Si–Mg alloys. Grain refinement is a way to improve mechanical properties. Al5Ti1B master alloy with TiB2 and extra Ti is widely accepted in industry for the grain refinement of aluminium alloys, especially wrought aluminium alloys, but it is hard to meet the expectations of cast Al–Si–Mg alloys due to the poisoning effect by Si. Al3Ti3B master alloy with TiB2 and extra B was prepared for the grain refinement of cast Al–Si–Mg alloys. The microstructure and tensile properties of cast Al–Si–Mg alloys under refinement of Al3Ti3B master alloy were investigated. Under optimised condition, the Al–Si–Mg cast alloys could provide a yield strength over 310 MPa, a UTS over 360 MPa and an elongation over 6 %. The mechanisms of grain refinement and improvement of mechanical properties were discussed.
||Planned: Light Metals