Creep and elemental partitioning behavior of Mg-Al-Ca-Sn alloys with the addition of Sr

Jessica R. TerBush, Olivia H. Chen, J. Wayne Jones, Tresa M. Pollock

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

Abstract

The partitioning of elements during solidification can strongly affect precipitation and solute strengthening during creep, especially in alloys where creep is controlled by viscous glide of dislocations. Elemental partitioning during solidification and its influence on creep behavior has been examined for Mg-6.5A1-2.25Ca-0.8Sn with and without 0.25wt% Sr additions. The alloy containing Sr experienced increased partitioning of Al and Ca to the α-Mg phase. However, the creep behavior in compression at 110 MPa and 180°C was not significantly different from that of the alloy without Sr. These observations are discussed in terms of current models for solid solution and precipitation strengthening. In addition, it was determined that the elemental partitioning profiles of permanent mold cast specimens were representative of the grain interiors of die-cast specimens. The partitioning profiles may be less representative for interdendritic regions of the microstructure, however.

Original languageEnglish (US)
Title of host publicationMagnesium Technology 2011 - Held During TMS 2011 Annual Meeting and Exhibition
PublisherMinerals, Metals and Materials Society
Pages217-222
Number of pages6
ISBN (Print)9781118029367
StatePublished - Jan 1 2011
Externally publishedYes
EventMagnesium Technology 2011 - TMS 2011 Annual Meeting and Exhibition - San Diego, CA, United States
Duration: Feb 27 2011Mar 3 2011

Publication series

NameMagnesium Technology
ISSN (Print)1545-4150

Other

OtherMagnesium Technology 2011 - TMS 2011 Annual Meeting and Exhibition
CountryUnited States
CitySan Diego, CA
Period2/27/113/3/11

Keywords

  • Creep
  • Elemental partitioning
  • Precipitation
  • Solute strengthening

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    TerBush, J. R., Chen, O. H., Jones, J. W., & Pollock, T. M. (2011). Creep and elemental partitioning behavior of Mg-Al-Ca-Sn alloys with the addition of Sr. In Magnesium Technology 2011 - Held During TMS 2011 Annual Meeting and Exhibition (pp. 217-222). (Magnesium Technology). Minerals, Metals and Materials Society.