EFFECT OF ALLOYING ELEMENTS ON THE FORMATION AND STRUCTURAL FEATURES OF LONG PERIOD STACKING STRUCTURES IN AS-SOLIDIFIED MG ALLOYS
北京工业大学
Cite this article:
. EFFECT OF ALLOYING ELEMENTS ON THE FORMATION AND STRUCTURAL FEATURES OF LONG PERIOD STACKING STRUCTURES IN AS-SOLIDIFIED MG ALLOYS. Acta Metall Sin, 2008, 44(4): 428-432 .
Abstract Mg97Y2X1（at%,X= Zn,Ni,Ag）alloys were prepared by induction melting method and characteristic long period stacking structures(LPS) formed in these alloys studied by transmission electron microscopy and scanning electron microscopy. The results show that the LPS in the as-solidified Mg97Y2Zn1 can be described as a structure with a 6-layer stacking period, which is different from the typical LPS of the 6H type in a hcp structure. The existence of LPS in the Mg-Y-Ni system has been found for the first time. The lattice distortion in LPS structures occurs more often in the Mg-Y-Ni system than in the Mg-Y-Zn system. In contrast, no LPS structure is found to be formed in the Mg-Y-Ag sysyem. On the basis of experimental results, the factors affecting the formation of LPS structures in Mg97Y2X1 alloys are also discussed.
