Mechianical properties and precipitation behaviors of Mg-Al-Sn and Mg-Zn-Sn alloys

Toyohiko J. Konno, Jong Beom Lee, Takahiro Ohya, Hyeon Taek Son, Haguk Jeong

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have examined mechanical properties and precipitation behaviors of Mg-Al-Sn and Mg-Zn-Sn systems in order to develop low-cost Mg-based alloys. For the Mg-Al-Sn alloys, the ultimate strength (UTS) of an extruded Mg-9wt%Al-2wt%Sn alloy reached 39OMPa. TEM observation indicated that plate-like Mg17 Al12 precipitates having Burgers orientation relationship with the matrix are responsible for the strength. This alloy also exhibits an age hardening behavior: The peak hardness appears after 15-20 hrs of heat treatment at 473K. On the other hand, the UTS of the Mg-Zn-Sn alloys are on the order of 300MPa. The precipitates in these alloys are composed of the Mg2Sn and MgZn2 particles. It was found that these phases often precipitate together, suggesting that the MgZn2 phase can act as a nucleation sites for Mg2Sn.

Original languageEnglish
Title of host publicationTMS 2010 - 139th Annual Meeting and Exhibition - Supplemental Proceedings
Pages145-148
Number of pages4
Publication statusPublished - 2010
EventTMS 2010 - 139th Annual Meeting and Exhibition - Seattle, WA, United States
Duration: 2010 Feb 142010 Feb 18

Publication series

NameTMS Annual Meeting
Volume3

Other

OtherTMS 2010 - 139th Annual Meeting and Exhibition
Country/TerritoryUnited States
CitySeattle, WA
Period10/2/1410/2/18

Keywords

  • Age-hardening
  • Magnesium alloy
  • Precipitation
  • Transmission electron microscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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