Fabrication and characterization of stir casting AA6061-31%B_4C composite

作     者：李宇 李丘林 李栋 刘伟 束国刚 Yu LI;Qiu-lin LI;Dong LI;Wei LIU;Guo-gang SHU

作者机构：清华大学深圳研究生院深圳518055 清华大学材料科学与工程学院北京100084 清华大学核材料联合实验室深圳518055 

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

年 卷 期：2016年第26卷第9期

页      面：2304-2312页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0806[工学-冶金工程] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 0703[理学-化学] 0802[工学-机械工程] 0814[工学-土木工程] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

基　　金：founded by Joint Laboratory of Nuclear Materials and Service Safety (2013966003) China 

主　　题：Al-B4C alloy metal matrix composite stir casting microstructure mechanical properties 

摘      要：A sophisticated stir casting route to fabricate large scale AA6061-31%B4C composite was developed. Key process parameters were studied, microstructure and mechanical properties of the composite were investigated. The results indicated that vacuum stirring/casting, B4C/Mg feeding and ingots cooling were essential to the successful fabrication of AA6061-31%B4C composite. Chemical erosion examination verified the designed B4 C content; X-ray fluorescence spectrometer（XFS） showed the chemical composition of Mg and Si in the matrix conformed to industry standards; scanning electronic microscope（SEM） and X-ray diffraction（XRD） revealed that B4 C particles were evenly distributed in the composites with well dispersed Mg2Si precipitates. Tensile testing results showed that the AA6061-31%B4C composite had a tensile strength of 340 MPa, improved by 112.5% compared with AA1100-31%B4C composite, which is attributed to the enhanced strength of the matrix alloy.