Effect of trace boron on grain refinement of commercially pure aluminum by Al-5Ti-1B  

微量硼添加对Al-5Ti-1B细化工业纯铝的影响

作　　者：Fei XIAO Ming-xu WU Yi-xiao WANG Wen-zhe ZHOU Shu-bin WANG Dong-hong WANG Guo-liang ZHU Michael JIANG Da SHU Jia-wei MI Bao-de SUN 肖飞;吴明旭;王一笑;周文哲;王舒滨;汪东红;祝国梁;Michael JIANG;疏达;米家伟;孙宝德(上海交通大学材料科学与工程学院先进高温材料与精密成形上海市重点实验室和金属基复合材料国家重点实验室,上海200240;上海交通大学材料科学与工程学院轻合金精密成型国家工程研究中心,上海200240;深圳Almate有限公司,深圳518102;School of Engineering and Computer Science,University of Hull,Hull,HU67RX,UK)

机构地区：[1]Shanghai Key Lab of Advanced High-temperature Materials and Precision Forming and State Key Laboratory of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [2]National Engineering Research Center of Light Alloy Net Forming,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [3]Shenzhen Almate Inc.,Shenzhen 518102,China [4]School of Engineering and Computer Science,University of Hull,Hull,HU67RX,UK

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第4期1061-1069,共9页中国有色金属学报（英文版）

基　　金：the financial supports from the National Natural Science Foundation of China(Nos.U1832183,52090042,51821001)。

摘　　要：The effect of boron content on grain refinement of commercially pure aluminum by Al-5Ti-1B was quantitatively assessed.When the boron content is less than 0.03 wt.%,the refining performance of Al-5Ti-1B gradually is weakened as the boron content increases,which is attributed to the reaction of boron with the Al_(3)Ti interlayer on TiB_(2)and the consumption of solute Ti.On the contrary,when the boron content exceeds 0.03 wt.%,the refining performance of Al-5Ti-1B gradually recovers with increasing boron content,which is related to the formation of primary AlB_(2)particles that provide additional nucleant substrates.定量研究硼含量对Al-5Ti-1B细化工业纯铝的影响。研究发现,当B含量低于0.03%(质量分数)时,Al-5Ti-1B的细化性能随B含量的增加而逐渐减弱,这是由于B与TiB_(2)上的Al_(3)Ti中间层发生反应以及熔体中溶质Ti的消耗。相反,当B含量超过0.03%(质量分数)时,Al-5Ti-1B的细化性能随着B含量的增加而逐渐恢复,这与熔体中AlB_(2)颗粒的形成有关,AlB_(2)颗粒为α(Al)的形核提供额外的形核核心。

关 键 词：aluminum alloy casting Al-5Ti-1B grain refinement boron treatment NUCLEATION 

分 类 号：TG146.21[一般工业技术—材料科学与工程]