Effect of cooling rate on solidification parameters and microstructure of A1-7Si-0.3Mg-0.15Fe alloy

作     者：陈瑞 石玉峰 许庆彦 柳百成 Rui CHEN;Yu-feng SHI;Qing-yan XU;Bai-cheng LIU

作者机构：清华大学材料学院先进成形制造教育部重点实验室北京100084 

基　　金：Projects (2005CB724105,2011CB706801) supported by the National Basic Research Program of China Projects (10477010,51171089) supported by the National Natural Science Foundation of China Projects (2009ZX04006-041-04,2011ZX04014-052) supported by the Important National Science&Technology Specific,China 

出 版 物：《Transactions of Nonferrous Metals Society of China》 (中国有色金属学报（英文版）)

年 卷 期：2014年第24卷第6期

页      码：1645-1652页

摘      要：The effects of cooling rate on the solidification parameters and microstructure of Al-7Si-0.3Mg-0.15 Fe alloy during solidification process were *** obtain different cooling rates,the step casting with five different thicknesses was used and the cooling rates and solidification parameters were determined by computer-aided thermal analysis *** results show that at higher cooling rates,the primary α（Al） dendrite nucleation temperature,eutectic reaction temperature and solidus temperature shift to lower ***,with increasing cooling rate from 0.19 ℃/s up to 6.25 ℃/s,the secondary dendritic arm spacing decreases from 68 μm to 20 μm,and the primary dendritic volume fraction declines by approximately 5%.In addition,it reduces the length of Fe-bearing phase from 28 μm to 18 μm with a better uniform *** is also found that high cooling rates make for modifying eutectic silicon into fibrous branched morphology,and decreasing block or lamella shape eutectic silicon.

主 题 词：aluminium alloys cooling rate thermal analysis solidification parameters microstructure 

学科分类：08[工学] 080502[080502] 0805[工学-能源动力学] 

核心收录：

D　O　I：10.1016/S1003-6326(14)63236-2

馆 藏 号：203136591...