Microstructures and mechanical properties of Mg-Zn-Y alloy consolidated from gas-atomized powders using high-pressure torsion

Eun Yoo Yoon, Dong Jun Lee, Taek Soo Kim, Hong Jun Chae, P. Jenei, Jeno Gubicza, Tamas Ungár, Milos Janecek, Jitka Vratna, Sunghak Lee, Hyoung Seop Kim

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

In this paper, rapid solidified Mg 95Zn 4.3Y 0.7 (at.%) alloy powders produced by an inert gas atomizer were consolidated using a severe plastic deformation technique of high pressure torsion (HPT) at room temperature and 373 K. The behavior of powder consolidation, matrix microstructural evolution, and mechanical properties of the powders and compacts were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, microhardness, and tensile testing. As the HPT processing temperature increases, the powders are more plastically deformed due to decreased deformation resistance, grain boundaries are more in equilibrium, powder bonding is enhanced due to increased interparticle diffusion, hence, tensile ductility and strength increases. On the other hand, hardness decreases with the increased processing temperature, due to less dislocation density.

Original languageEnglish
Pages (from-to)7117-7123
Number of pages7
JournalJournal of Materials Science
Volume47
Issue number20
DOIs
Publication statusPublished - Oct 1 2012

    Fingerprint

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this