Abstract
Solidification microstructures of Mg rich Mg-Zn-Y alloys were studied by using optical microscopy, scanning electron microscopy and transmission electron microscopy. Pseudo eutectic reaction (Liquid → α-Mg + icosahedral phase) takes place during solidification. Alloys containing high Mg content solidifies by primary crystallization of α-Mg followed by the eutectic reaction at interdendritic region. Mg68Zn28Y4 alloy solidifies by primary crystallization of I-phase followed by the eutectic reaction into a mixture of α-Mg and I-phase. Occasionally D-phase and Mg4Zn7 phases were observed to form with orientation relationships with previously formed I-phase and D-phase, respectively. The strength of the alloys increased with increasing the volume fraction of I-phase.
Original language | English |
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Pages (from-to) | K251-K256 |
Journal | Materials Research Society Symposium Proceedings |
Volume | 643 |
State | Published - 2001 |
Event | Quasicrystals - Preparations, Properties and Applications - Boston, MA, United States Duration: 27 Nov 2000 → 30 Nov 2000 |