Precipitate formation in uniaxially stressed high pressure die cast binary Mg-Nd alloy during creep testing

Deep Choudhuri, Soumya Nag, Nilesh Dendge, Mark A. Gibson, Rajarshi Banerjee

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Role of applied stress on intragranular precipitation in Mg-Nd alloys was investigated by subjecting Mg-0.5at%Nd tensile bars to creep deformation at a nominal stress of 90 MPa and 177°C. Prior work on creep-tested Mg-Nd studied precipitation after 100 Hrs of creep deformation [Choudhuri et.al. Metal Trans A Comm.2013, 44, 2905]. Developing on this published work, the present investigation systematically examined precipitate formation during early (5 Hrs) to middle (100 Hrs) stages of creep. Very early stages of creep resulted in a homogeneous distribution of fine-scale β' precipitates within α-Mg matrix. Contrastingly, within similar time frame a relatively localized distribution of β1, precipitates was noted - presumably decorating dislocation lines. Interesting, throughout the creep deformation, β1 plates exhibited preferential alignment tendencies on a specific set of {1010}Mg planes / <1120>Mg directions. Such preferential alignment along favorable slip directions within the α-Mg matrix may influence the creep response of the Mg-Nd alloy.

Original languageEnglish
Title of host publicationMagnesium Technology 2014 - Held During TMS 2014 143rd Annual Meeting and Exhibition
PublisherMinerals, Metals and Materials Society
Pages55-57
Number of pages3
ISBN (Print)9781118888162
DOIs
StatePublished - 2014
Externally publishedYes
EventMagnesium Technology 2014 - TMS 2014 143rd Annual Meeting and Exhibition - San Diego, CA, United States
Duration: Feb 16 2014Feb 20 2014

Publication series

NameMagnesium Technology
ISSN (Print)1545-4150

Conference

ConferenceMagnesium Technology 2014 - TMS 2014 143rd Annual Meeting and Exhibition
Country/TerritoryUnited States
CitySan Diego, CA
Period02/16/1402/20/14

Keywords

  • Creep
  • Dynamic precipitation
  • Mg-Nd

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