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

doi: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

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

Graz University of Technology (90000)

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-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 language	English
Title of host publication	THERMEC 2016
Publisher	Trans Tech Publications Ltd.
Pages	2300-2305
Number of pages	6
ISBN (Print)	9783035711295
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.879.2300
Publication status	Published - 1 Jan 2017
Event	9th International Conference on Processing and Manufacturing of Advanced Materials: Thermec 2016 - Stadthalle Graz, Graz, Austria Duration: 29 May 2016 → 3 Jun 2016 https://www.tugraz.at/events/thermec-2016/home/

Publication series

Name	Materials Science Forum
Volume	879
ISSN (Print)	0255-5476

Conference

Conference	9th International Conference on Processing and Manufacturing of Advanced Materials
Abbreviated title	THERMEC 2016
Country/Territory	Austria
City	Graz
Period	29/05/16 → 3/06/16
Internet address	https://www.tugraz.at/events/thermec-2016/home/

Keywords

Casting
Magnesium
Mischmetal
Rare earths
Semi-Solid

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Access to Document

10.4028/www.scientific.net/MSF.879.2300

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

Research output: Chapter in Book/Report/Conference proceeding › Conference paper › peer-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, Graz, Austria, 29/05/16. https://doi.org/10.4028/www.scientific.net/MSF.879.2300

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

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.",

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AB - 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.

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

Abstract

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Conference

Keywords

ASJC Scopus subject areas

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