Microstructural Evolution and Grain Refining Efficiency of Al-10Ti Master Alloy Improved by Copper Mold Die Casting

被引：8
|
作者：
Wang, Jianhua [1 ,2 ]
Li, Tao [1 ,2 ,3 ]
Su, Xuping [1 ,2 ]
Tu, Hao [1 ,2 ]
Liu, Ya [1 ,2 ]
Wu, Changjun [1 ,2 ]
Li, Jielin [1 ,2 ]
机构：
[1] Changzhou Univ, Sch Mat Sci & Engn, Changzhou 213164, Jiangsu, Peoples R China
[2] Changzhou Univ, Key Lab Adv Metall Mat Changzhou City, Changzhou 213164, Jiangsu, Peoples R China
[3] Nanshan Light Alloy Co, Longkou 265700, Shandong, Peoples R China
来源：
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2013年 / 22卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Al-10Ti master alloy; aluminum alloys; die casting; grain refinement; microstructure; ALUMINUM-ALLOYS; REFINEMENT; PERFORMANCE; AL; SOLIDIFICATION; PARTICLES; SIZE;
D O I：
10.1007/s11665-013-0490-6
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructural evolution and grain refining efficiency of sub-rapidly solidified (SRS) Al-10Ti master alloy has been studied. The results show that the mean size of Al3Ti particles in the SRS Al-10Ti master alloy decreased significantly and the morphology changed from strip-like to blocky and short rod-like compared with the conventional Al-10Ti master alloy. Grain refining experiments show that the SRS Al-10Ti master alloy is more effective than the conventional master alloy for refining Al-7Si alloy. The conversion rate of columnar to fine equiaxed grain structure in the Al-7Si alloy was promoted by the addition of SRS master alloy, and the microhardness of Al-7Si alloy increased. The mechanisms of grain refinement of aluminum by inoculation with improved Al-10Ti master alloy are discussed based on the solute theory. The decrease in size, increase in quantity, and change in morphology of Al3Ti particles are considered as the reasons for the improvement of microstructure and microhardness.
引用
收藏
页码：2012 / 2018
页数：7
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