Effect of Solid/Liquid and Eutectic Front Velocities on Microstructure Evolution in Al-20%Cu Alloys

Effect of Solid/Liquid and Eutectic Front Velocities on Microstructure Evolution in Al-20%Cu Alloys

Blog Article

During the solidification process, microstructures are affected by the experimental conditions, here the thermophysical characteristics of the alloy, and the type of grain-refining particles.Unidirectional solidification experiments were performed in a vertical Bridgman-type furnace to investigate the effect of the solidification front velocity on the solidified microstructure of a non-refined and refined Al-20%Cu alloy.The samples were solidified by rapidly increasing the sample velocity (v) range from 0.02 mm/s to 0.

2 mm/s while maintaining an almost constant temperature gradient (~5 K/mm).As a result, despite changes in the solid/liquid front velocity along the sample, the microstructure of the non-refined alloys remained columnar.In the refined alloy, the columnar structure changed into an equiaxed structure equi-jec 6 at two different front velocities.