Solidification Behavior of Aluminum-Copper Based Alloy during Controlled Diffusion Solidification

Abstract:

Controlled diffusion solidification (CDS) is a novel and simple process that enables the formation of non-dendritic microstructure of primary Al phase through mixing two liquid alloys of different composition and temperature together. A quaternary alloy (Al-5.0Cu-0.35Mn-0.25Ti, wt.%), having a similar chemical component with ZL205A, was fabricated using controlled diffusion solidification (CDS) method with different mixing temperature. The mixing temperature of two liquids mostly affects the cast structure especially the primary Al phase. Results show that CDS can reduce the element segregation degree inside the grains. Microstructure evolution during solidification initiates from a primary nucleus firstly and then changed to a non-dendritic grain structure. The thermal analysis confirms the thermodynamic conditions for the formation of non-dendritic grain structure evolution.

• Periodical: Materials Science Forum (Volume 879)
• Pages: 1535-1539
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.879.1535
• Online since: November 2016
• Authors: Li Fan, Qi Tang Hao*, Liang Bo Liu, Rui Qi Shen
• Keywords: Aluminum Alloy, Controlled Diffusion Solidification, Solidification Behavior, Thermodynamic

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