Investigation of compression behavior of Mg-4Zn-2(Nd, Gd)-0.5Zr at 350°C by in situ synchrotron radiation diffraction

R. H. Buzolin*, D. Tolnai, C. L. Mendis, Andreas Stark, N. Schell, H. Pinto, K. U. Kainer, N. Hort

*Corresponding author for this work

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

Abstract

As-cast Mg-4Zn-0.5Zr, Mg-4Zn-2Gd-0.5Zr and Mg-4Zn-2Nd- 0.5Zr alloys were investigated by in situ synchrotron radiation diffraction during hot compression at 350 °C using the facilities of P07 beamline of Petra III at Deutsches Elektronen Synchrotron (DESY), Hamburg, Germany. The specimens were heated at a rate of 100 K/min and compressed with an initial strain rate of 1.1 x 10"3 s"1 up to 30 % strain. The addition of rare earth elements improved the yield strength from 23 MPa in the Mg-4Zn-0.5Zr alloy up to 40 MPa in the alloy with Nd and Gd. Continuous dynamic recrystallization played an important role in the Mg-4Zn- 0.5Zr alloy during deformation and twinning was not dominant. Discontinuous dynamic recrystallization was observed in the in the Mg-4Zn-2Gd-0.5Zr along the grain boundary regions while the grains remained largely without any recrystallization. In the Mg-4Zn-2Gd-0.5Zr and Mg-4Zn-2Nd-0.5Zr alloys the contribution of twinning to deformation was observed at 350 °C. Reasons for these differences will be discussed with respect to microstructures of the alloys.

Original languageEnglish
Title of host publicationMagnesium Technology 2015 - Held During TMS 2015 144th Annual Meeting and Exhibition
PublisherThe Minerals, Metals and Materials Society
Pages103-107
Number of pages5
Volume2015-January
ISBN (Electronic)9781119082439
Publication statusPublished - 1 Jan 2015
Externally publishedYes
EventMagnesium Technology 2015 - TMS 2015 144th Annual Meeting and Exhibition - Orlando, United States
Duration: 15 Mar 201519 Mar 2015

Conference

ConferenceMagnesium Technology 2015 - TMS 2015 144th Annual Meeting and Exhibition
CountryUnited States
CityOrlando
Period15/03/1519/03/15

Keywords

  • Deformation behaviour
  • In situ
  • RE additions
  • Synchrotron radiation
  • ZK40

ASJC Scopus subject areas

  • Engineering(all)

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