Morphological Instability in Solidifying Alloy

• Main Authors: Ou-Yang, Keh-Wuu, 歐陽克武
• Other Authors: Wei, Perng-Sheng
• Format: Others
• Language: en_US
• Published: 1996
• Online Access: http://ndltd.ncl.edu.tw/handle/25645651424098377795

碩士 === 國立中山大學 === 機械工程研究所 === 84 === The formation of primary and second dendrites from solving axisymmetric energy and concentration equations in the solid and liquid are investigated. A boundary element method can be conveniently used to determine strong deformation of the solid- liquid interface. Applying Mullins and Sekerka's mo- phological criterion whose temperature and concentration gradients , wavelength, and normal velocity along the inter- face at any instant time are obtained from conservation equation provides a clear understanding of the primary and second dendrites during solidfication