Grain refinement of A356 alloy by Al-Ti-B-C master alloy and its effect on mechanical properties
Grain refinement of A356 alloy by Al-Ti-B-C master alloy and its effect on mechanical properties
复制标题
Al-Ti-B-C中间合金细化A356合金晶粒及其对力学性能的影响
DOI：
10.1016/j.matdes.2012.12.033
复制
发表时间：
2013-05-01
影响因子：
8.4
通讯作者：
Liu, Xiangfa
中科院分区：
文献类型：
--
作者：
Li, Pengting;Liu, Sida;Liu, Xiangfa
采用熔体反应法制备了组织均匀的Al-3Ti-1B-0.2C中间合金。在中间合金中，TiB_2颗粒呈层次化枝晶形态，而微量B掺杂的TiC颗粒呈多面体形态。研究了中间合金对A356合金的细化性能。结果表明，添加0.2wt.%Al-3Ti-1B-0.2C中间合金对A356合金具有很好的细化效果。α-Al的平均晶粒度由约1570微米降至167+/-8微米，细化效果在60min内未见明显衰减。因此，Al-3Ti-1B-0.2C中间合金的加入明显改善了A356合金的力学性能，包括极限抗拉强度、屈服强度和延伸率。(C)2013爱思唯尔有限公司。保留所有权利。
A new Al-3Ti-1B-0.2C master alloy with uniform microstructure was prepared using a melt reaction method in this study. In the master alloy, TiB2 particles exhibit hierarchical dendritic morphology, while TiC particles doped with a trace amount of B show a polyhedral morphology. The grain refining performance of the master alloy on A356 alloy has also been investigated. It is found that the addition of 0.2 wt.% Al-3Ti-1B-0.2C master alloy can induce very effective grain refinement of the A356 alloy. The average grain size of alpha-Al is reduced to 167 +/- 8 mu m from about 1570 mu m and the grain refining efficiency does not fade obviously within 60 min. Therefore, the mechanical properties of the A356 alloy have been improved obviously by the addition of the Al-3Ti-1B-0.2C master alloy, including the ultimate tensile strength, yield strength and elongation. (C) 2013 Elsevier Ltd. All rights reserved.