铸造技术2011，Vol.32Issue(9)：1283-1286,4.
Al-Cu合金共晶凝固组织形貌及其影响因素
Solidification Morphology of Al-Cu Alloy and Its Influencing Factors
摘要
Abstract
The morphologies of primary crystal phase α-AI and 8-AI2Cu in Al-Cu alloys with various composition and cooling velocity were observed by optical microscope(OM) and scanning electron microscope(SEM). The results show that the primary crystal phase AI2Cu in the hypereutectic structure have obvious corners, that indicates they have the faceted growth properties. But when it grows with α-AI in the eutectic structures, the preferred orientation of AI2Cu is weaken, and the non-faceted to non-faceted coupled growing is showed. The halo microstructures of primary oc-AI phase surrounded by 6-AI2Cu were found in the hypoeutectic structures. With the increasing of cooling rate, the eutectic structure becomes finer and finer, and developed primary α-AI phase can be observed. The big plate primary 0-AI2Cu phase becomes short rectangle.关键词
Al-Cu合金/共晶组织/生长方式/冷却速度Key words
Al-Cu alloys/ Eutectic structures/ Growth method/ Halo分类
矿业与冶金引用本文复制引用
马涛,唐玲..Al-Cu合金共晶凝固组织形貌及其影响因素[J].铸造技术,2011,32(9):1283-1286,4.基金项目
陕西理工学院基金资助项目(SLGQD0744) （SLGQD0744）
