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 | |
| Publication status | Published - 1 Jan 2017 |
| Event | 9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria Duration: 29 May 2016 → 3 Jun 2016 |
Publication series
| Name | Materials Science Forum |
|---|---|
| Volume | 879 |
| ISSN (Print) | 0255-5476 |
Conference
| Conference | 9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 |
|---|---|
| Country | Austria |
| City | Graz |
| Period | 29/05/16 → 3/06/16 |
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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
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 proceeding › Conference contribution › Research › peer-review
}
TY - GEN
T1 - Effect of mischmetal additions and solution heat treatments (T4) on the microstructure and mechanical properties of thixocast ZK60-RE magnesium alloys
AU - da Silva, Erenilton Pereira
AU - Buzolin, Ricardo Henrique
AU - Callegari, Bruna
AU - Warchomicka, Fernando
AU - Requena, Guillermo C.
AU - Pinto, Haroldo Cavalcanti
PY - 2017/1/1
Y1 - 2017/1/1
N2 - 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.
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.
KW - Casting
KW - Magnesium
KW - Mischmetal
KW - Rare earths
KW - Semi-Solid
UR - http://www.scopus.com/inward/record.url?scp=85000538687&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.879.2300
DO - 10.4028/www.scientific.net/MSF.879.2300
M3 - Conference contribution
SN - 9783035711295
T3 - Materials Science Forum
SP - 2300
EP - 2305
BT - THERMEC 2016
PB - Trans Tech Publications Ltd.
ER -