Electron microscopy study of microstructure modifications in RS P/M Mg97Zn1Y2 alloy

M. Nishida, T. Yamamuro, M. Nagano, Y. Morizono, Y. Kawamura

Research output: Contribution to journalConference articlepeer-review

26 Citations (Scopus)

Abstract

In order to clarify the formation process of 6H-phase in RS P/M Mg97Zn1Y2 alloy, transmission electron microscopy (TEM) observations have been carried out. The initial microstructure of RS powder consists of cellular structure. The equiaxed grains about 1 μm in average diameter are surrounded by rather wide Y and Zn rich amorphous grain boundaries. 6H-phase was observed at grain boundaries in the RS ribbon prepared at circumferential speed of 42 m/s. By lowering the circumferential speed, the 6H-phase at grain boundary in the RS ribbon changes to amorphous phase. The growth of 6H-phase starts from grain boundary in the RS ribbon annealed at 573 K for 1.2 ks. It can be concluded that the 6H-phase in RS P/M Mg97Zn1Y2 alloy crystallizes in the Y and Zn rich amorphous phase at grain boundary and then grows into grain interior during extrusion.

Original languageEnglish
Pages (from-to)715-720
Number of pages6
JournalMaterials Science Forum
Volume419-422
Issue numberII
Publication statusPublished - Jan 1 2003
Externally publishedYes
EventProceedings of the Second Osaka International Conference on Platform Science and Technology for Advanced Magnesium Alloys 2003 - Osaka, Japan
Duration: Jan 26 2003Jan 30 2003

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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