The Role of Zn Additions on the Microstructure and Mechanical Properties of Mg–Nd–Zn Alloys

S. Gavras, T. Subroto, R. H. Buzolin, N. Hort, D. Tolnai

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Mg-rare earth alloys have improved yield strength and creep resistance compared to commercial alloys such as AZ91, AM60 or AS21. The influence of Zn additions in Mg–Nd alloys on intermetallic phases and the resulting changes in the macroscopic mechanical behaviour of the materials are not yet fully understood. The aim of this work is to identify the effect of Zn additions on the nature of the intermetallic phases and on the mechanical properties in a Mg–4Nd (wt%) alloy. The addition of 8 wt% Zn to a base Mg–4Nd wt% alloy marginally improved the tensile and compression properties at room temperature or at 200 °C with the exception of the 0.2% proof stress of Mg–4Nd–8Zn alloys when tensile- or compression-tested at 200 °C. Two intermetallic phases, a quasi-binary Mg3(Zn, Nd) and ternary Mg50Nd8Zn42, have been identified by the means of electron microscopy and synchrotron diffraction. These results indicate that there are some discrepancies in the current thermodynamic calculations, suggesting an update to the databases may be required.

LanguageEnglish
Pages428-433
Number of pages6
JournalInternational Journal of Metalcasting
Volume12
Issue number3
DOIs
StatusPublished - 1 Jul 2018

Fingerprint

Mechanical properties
Microstructure
Intermetallics
Compaction
Rare earth alloys
Creep resistance
Synchrotrons
Electron microscopy
Yield stress
Diffraction
Thermodynamics
Temperature

Keywords

  • mechanical properties
  • Mg–Nd–Zn
  • phase identification
  • synchrotron diffraction

ASJC Scopus subject areas

  • Mechanics of Materials
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

The Role of Zn Additions on the Microstructure and Mechanical Properties of Mg–Nd–Zn Alloys. / Gavras, S.; Subroto, T.; Buzolin, R. H.; Hort, N.; Tolnai, D.

In: International Journal of Metalcasting, Vol. 12, No. 3, 01.07.2018, p. 428-433.

Research output: Contribution to journalArticleResearchpeer-review

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