Effect of Eutectic Mg2 Si Phase Modification on the Mechanical Properties of Al-8Zn-6Si-4Mg-2Cu Cast Alloy

被引：19
作者：
Kim, Byung Joo [1 ,2 ]
Jung, Sung Su [1 ]
Hwang, Ji Hoon [3 ]
Park, Yong Ho [2 ]
Lee, Young Cheol [1 ]
机构：
[1] Korea Inst Ind Technol, Energy Plant Grp, Busan 46938, South Korea
[2] Pusan Natl Univ, Dept Mat Sci & Engn, Busan 46241, South Korea
[3] LG Elect, Mat & Prod Engn Res Inst, Pyeongtaek 17709, South Korea
来源：
METALS | 2019年 / 9卷 / 01期
关键词：
aluminum alloys; intermetallic compound; phase modification; eutectic Mg2Si; mechanical properties; NANOCRYSTALLINE MG2SI; MICROSTRUCTURE; CRYSTAL;
D O I：
10.3390/met9010032
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The modification effect of Al-5Ti-1B master alloy on eutectic Mg2Si in Al-Zn-Si-Mg system alloy was investigated in this study. The microstructure shows that an extreme effect can be achieved after the addition of Al-5Ti-1B master alloy into the base alloy. The morphology of eutectic Mg2Si changed from Chinese script to fine polygonal shape, and the size was refined from over 50 mu m to under 10 p.m. This morphology change is believed to be due to TiB2 particles existing in Al-5Ti-1B master alloy, and the presence of TiB2 particles inside the modified Mg2Si was confirmed by scanning electron microscope/energy dispersive spectrometer (SEM/EDS) observation. The mechanical properties were also improved by the addition of Al-5Ti-1B master alloys. This study investigated the reason for the improvement in mechanical properties with the modification of the microstructure.
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页数：10
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