Effects of casting parameters on microstructure and dendrite morphology of ZA27 zinc based alloy

• DOI: 10.1179/1743133614y.0000000132
• Publication Date: 2014-08-04T12:42:44Z
• Authors: T. J. Chen; X. W. Li; H. Y. Guo; Y. Hao
• Keywords: Equiaxed crystals; Dendrite (mathematics); Morphology

The effects of several casting parameters on microstructure and dendrite morphology ZA27 alloy have been investigated. results indicate that rising pouring temperature, solidifying in the mould with large chilling ability or small diameter cavity may change primary phase from normal equiaxed dendrites to feathery grains. Four lines secondary arms form around trunk a grain. Two them exist twin plane (111) other two an angle 70·5° plane. All 60° trunk. former are easier grow up than lines. Therefore, grains overlapped by laminar most common. formation can be divided into three stages, nucleation growth, variation growth direction