Effect of mischmetal additions and solution heat treatments (T4) on the microstructure and mechanical properties of thixocast ZK60-RE magnesium alloys

Erenilton Pereira da Silva, Ricardo Henrique Buzolin, Bruna Callegari, Fernando Warchomicka, Guillermo C. Requena, Haroldo Cavalcanti Pinto

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

Abstract

Solution treatments (T4) at 380 °C for 16 h and 500 °C for 8 h were performed for ZK60 magnesium alloys modified with addition of 0.5, 1.5 and 2.5 wt% of mischmetal (combination of rare-earth (RE) elements). The compression behaviour was investigated at room temperature and at 300 °C correlated with the microstructure and differential scanning calorimetry (DSC) data. The ascast microstructure is formed by -Mg matrix with globular grains reinforced by a semi continuous network of Mg-Zn, Mg-Zn-RE and Mg-RE intermetallic particles. Solution-treated alloys show lower yield strengths due to partial dissolution of precipitates. Work hardening was not observed for the alloys compressed at 300°C with the compression speed of 10-3 s-1, whereas it was observed for the compression speed of 10-2 s-1 for the all as-cast, ZK60-1.5RE-T4 at 380 °C and ZK60-1.5RE-T4 at 380 °C.

Original languageEnglish
Title of host publicationTHERMEC 2016
PublisherTrans Tech Publications Ltd.
Pages2300-2305
Number of pages6
ISBN (Print)9783035711295
DOIs
Publication statusPublished - 1 Jan 2017
Event9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria
Duration: 29 May 20163 Jun 2016

Publication series

NameMaterials Science Forum
Volume879
ISSN (Print)0255-5476

Conference

Conference9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
CountryAustria
CityGraz
Period29/05/163/06/16

Fingerprint

mischmetal
Rare earth alloys
rare earth alloys
magnesium alloys
Magnesium alloys
Rare earths
heat treatment
rare earth elements
Heat treatment
mechanical properties
Mechanical properties
microstructure
Microstructure
Rare earth elements
Strain hardening
Intermetallics
Yield stress
Precipitates
Differential scanning calorimetry
Dissolution

Keywords

  • Casting
  • Magnesium
  • Mischmetal
  • Rare earths
  • Semi-Solid

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

da Silva, E. P., Buzolin, R. H., Callegari, B., Warchomicka, F., Requena, G. C., & Pinto, H. C. (2017). Effect of mischmetal additions and solution heat treatments (T4) on the microstructure and mechanical properties of thixocast ZK60-RE magnesium alloys. In THERMEC 2016 (pp. 2300-2305). (Materials Science Forum; Vol. 879). Trans Tech Publications Ltd.. https://doi.org/10.4028/www.scientific.net/MSF.879.2300

Effect of mischmetal additions and solution heat treatments (T4) on the microstructure and mechanical properties of thixocast ZK60-RE magnesium alloys. / da Silva, Erenilton Pereira; Buzolin, Ricardo Henrique; Callegari, Bruna; Warchomicka, Fernando; Requena, Guillermo C.; Pinto, Haroldo Cavalcanti.

THERMEC 2016. Trans Tech Publications Ltd., 2017. p. 2300-2305 (Materials Science Forum; Vol. 879).

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

da Silva, EP, Buzolin, RH, Callegari, B, Warchomicka, F, Requena, GC & Pinto, HC 2017, Effect of mischmetal additions and solution heat treatments (T4) on the microstructure and mechanical properties of thixocast ZK60-RE magnesium alloys. in THERMEC 2016. Materials Science Forum, vol. 879, Trans Tech Publications Ltd., pp. 2300-2305, 9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016, Graz, Austria, 29/05/16. https://doi.org/10.4028/www.scientific.net/MSF.879.2300
da Silva, Erenilton Pereira ; Buzolin, Ricardo Henrique ; Callegari, Bruna ; Warchomicka, Fernando ; Requena, Guillermo C. ; Pinto, Haroldo Cavalcanti. / Effect of mischmetal additions and solution heat treatments (T4) on the microstructure and mechanical properties of thixocast ZK60-RE magnesium alloys. THERMEC 2016. Trans Tech Publications Ltd., 2017. pp. 2300-2305 (Materials Science Forum).
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