Columnar to equiaxed transition during alloy solidification

• DOI: 10.1360/02ye0337
• Publication Date: 2003-09-18T02:33:53Z
• Authors: Xin LIN
• Keywords: Equiaxed crystals

Considering the local linear superposition of the species and combining the calculation of phase diagram, the columnar and equiaxed growth behaviours are investigated systematically during solidification of multicomponent alloys. A theoretical model is developed to describe the columnar to equiaxed transition during multicomponent alloy solidification by taking account of the competition between nucleation and growth ahead of a dendrite array, which shows a good agreement with the experimental results.