Microsegregation and creep in Mg-Al-Ca-based alloys

Jessica R. TerBush, Raghavendra R. Adharapurapu, J. Wayne Jones, Tresa M. Pollock

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

Abstract

Die-cast MRI230D and AXJ530 have superior creep resistance to MRI153M, despite their similar microstructure, primary eutectic phases and dislocation substructure after creep. In order to better understand this difference in creep resistance, solute concentrations in the primary α-Mg in as-cast Mg-Al-Ca-based alloys have been examined using the electron microprobe along with a. Scheil analysis. The amount of Al in solution in the primary α-Mg is of particular interest since it can significantly affect creep behavior, due to precipitation and/or solid-solution strengthening. MRI230D and MRI153M both have higher levels of Al in the primary alpha, but only MRI230D also has increased levels of Ca as well, which may be attributable to the presence of Sn in this alloy. The differences in the primary alpha compositions may explain the differences in creep behavior that are observed.

Original languageEnglish (US)
Title of host publicationMagnesium Technology 2009
Pages161-165
Number of pages5
StatePublished - Oct 5 2009
Externally publishedYes
EventMagnesium Technology 2009 - San Francisco, CA, United States
Duration: Feb 15 2009Feb 19 2009

Publication series

NameMagnesium Technology
ISSN (Print)1545-4150

Conference

ConferenceMagnesium Technology 2009
CountryUnited States
CitySan Francisco, CA
Period2/15/092/19/09

Keywords

  • Creep
  • Magnesium alloy
  • Microsegregation

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint Dive into the research topics of 'Microsegregation and creep in Mg-Al-Ca-based alloys'. Together they form a unique fingerprint.

Cite this