摘要
研究了高温浇注下(750℃)的ZA27合金枝晶形貌,用扫描电镜观察断口缩松处的组织形态,直观地澄清了羽毛状晶的三维枝晶形貌。结果表明,羽毛状晶是一种非常发达的树枝晶,宏观上具有典型的三维结构,枝晶朝多个方向生长;但在枝晶局部并排生长,分枝细密且形态发达。羽毛状晶体生长方向为<110>方向,是晶体学择优生长方向与外力综合作用的结果。
Feathery dendrite morphology was investigated at high pouring temperature（750℃） in ZA27 alloy.Especially,the effect of pouring temperature on dendrite 3-dimension morphologies was directly examined through observation on morphology characteristics of dendrites that bared in porosities on fracture surfaces using scanning electron microscope.The results show that feathery crystal was a very well developed dendrite and had the typical three-dimensional structure towards multiple directions;but the branching grew side by side and morphology developed in the local.The direction of feathery dendrite combined the preferred crystallographic growth direction and external forces,leaing to 110 direction.
出处
《太原理工大学学报》
CAS
北大核心
2013年第3期326-329,335,共5页
Journal of Taiyuan University of Technology
