Nucleation mechanism for grain refinement in A357 alloy by Al-Ti-B master alloys
来源期刊：中国有色金属学报(英文版)2003年第z1期
论文作者：ZHU Zhao-jun(朱兆军) ZENG Song-yan(曾松岩) GUO Li-wei(郭立伟) WANG Hong-wei(王宏伟)
文章页码：98 - 101
Key words：A357 alloy; nucleation mechanism; grain refinement; Al-5Ti-1B master alloy
Abstract: Grain refinement in A357 alloy can be achieved by addition of Al-Ti-B master alloys. The phases in Al-5Ti-1B master alloy have been studied by OM, TEM and EPMA analyses. The results show that the Al-5Ti-1B master alloy contains α-Al, TiB2 and Al3Ti. The effect of the Al-5Ti-1B master alloy on the grain refinement of A357 alloy has been gained. The mechanism of grain refinement in A357 alloy by Al-Ti-B master alloys is also investigated based on the above results.
ZHU Zhao-jun(朱兆军)1, ZENG Song-yan(曾松岩)1, GUO Li-wei(郭立伟)2, WANG Hong-wei(王宏伟)1
(1.School of Materials Science and Engineering,
Harbin Institute of Technology, Harbin 150001, China;
2.School of Mechanical Engineering,
Harbin University of Science and Technology, Harbin 150080, China)
Abstract:Grain refinement in A357 alloy can be achieved by addition of Al-Ti-B master alloys. The phases in Al-5Ti-1B master alloy have been studied by OM, TEM and EPMA analyses. The results show that the Al-5Ti-1B master alloy contains α-Al, TiB2 and Al3Ti. The effect of the Al-5Ti-1B master alloy on the grain refinement of A357 alloy has been gained. The mechanism of grain refinement in A357 alloy by Al-Ti-B master alloys is also investigated based on the above results.
Key words:A357 alloy; nucleation mechanism; grain refinement; Al-5Ti-1B master alloy
