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.

引用

页数：10

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