2009•Materials Science and TechnologyRequires access

Solidification behavior of Al-6.0wt% Cu alloy in mushy zone under temperature gradient

Xiaonong Cheng

Abstract

After different holding time,the quenched microstructure and concentration distribution of Al-6.0wt%Cu alloy in the former mushy zone under temperature gradient of 12 K/mm were studied with a vertical directional solidification apparatus. SEM/EDX analysis shows that a diffusion-controlled solidification process starts spontaneously with the same mechanism as TGZM effect. Thus the relationship between temperature gradient and concentration gradient after complete solidification can be of great significance for determination of interfacial temperature during directional solidification and determination of phase equilibria.

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Available abstract

Key concepts: Temperature gradient, Materials science, Directional solidification, Alloy, Concentration gradient, Diffusion, Microstructure, Phase (matter)