Precipitation microstructure in Al-Si-Mg-Mn alloy with Zr additions

Maja  Vončina; Jožef  Medved; Stanislav  Kores; Pan  Xie; Peter Schumacher; Jiehua LI

doi:10.1016/j.matchar.2019.109820

Precipitation microstructure in Al-Si-Mg-Mn alloy with Zr additions

Maja Vončina, Jožef Medved, Stanislav Kores, Pan Xie, Peter Schumacher, Jiehua LI

Lehrstuhl für Gießereikunde (330)

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Begutachtung

11 Zitate (Scopus)

Abstract

The precipitation microstructure of Al-10Si-0.5 Mg-0.5Mn (wt%) alloys with different Zr additions was investigated. The β-type (i.e. Mg ₂Si) phase was observed to be dominant in the precipitation microstructure. Furthermore, the Q-Al ₅Cu ₂Mg ₈Si ₆ phase and the π-Al ₈Mg ₃FeSi ₆ phase were also observed to be the dominant thermodynamically stable precipitates at 180 °C. The main strengthening effect can be attributed to the Q-Al ₅Cu ₂Mg ₈Si ₆ and β-type (i.e. Mg ₂Si) precipitates due to the fact that the π-Al ₈Mg ₃FeSi ₆ phase is relatively large in size, plate-like in morphology, and low in number density and thereby volume fraction. More importantly, the Zr addition into the Al-Si-Mg-Mn alloys causes the precipitation to start at a lower temperature during ageing, which can be due to the grain refinement effect by Zr addition and thereby enhanced diffusion. This paper provides some insights in precipitation microstructure and thereby shortening the ageing treatment at a relatively low ageing temperature.

Originalsprache	Englisch
Aufsatznummer	109820
Seitenumfang	8
Fachzeitschrift	Materials characterization
Jahrgang	155.2019
Ausgabenummer	September
Frühes Online-Datum	15 Juli 2019
DOIs	https://doi.org/10.1016/j.matchar.2019.109820
Publikationsstatus	Veröffentlicht - Sept. 2019

Bibliographische Notiz

Funding Information:
Authors would like to thank to Österreichische Akademie der Wissenschaften for the opportunity to work on the project Joint Excellence in Science and Humanities, which supported the collaboration of scientists from different countries. This work was also supported by A Republic of Slovenia, Ministry of Education, Science and Sport and by European Commission , European Regional Development. This work was made in a frame of program Materials and Technologies for New Applications (MARTINA, grand number: C3330-16-529008 ) and Programme P2-0344(B), Functionally graded materials. Jiehua Li gratefully acknowledges the financial support from the Major International (Regional) Joint Research Project (No. 51420105005 ), the Overseas, Hong Kong, Macao Scholars Cooperative Research Fund (No. 51728101 ) from China, EPU 11/2018 and Austrian Science Fund (FWF ( P 32378-N37 )).

Publisher Copyright:
© 2019 Elsevier Inc.

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title = "Precipitation microstructure in Al-Si-Mg-Mn alloy with Zr additions",

abstract = "The precipitation microstructure of Al-10Si-0.5 Mg-0.5Mn (wt%) alloys with different Zr additions was investigated. The β-type (i.e. Mg 2Si) phase was observed to be dominant in the precipitation microstructure. Furthermore, the Q-Al 5Cu 2Mg 8Si 6 phase and the π-Al 8Mg 3FeSi 6 phase were also observed to be the dominant thermodynamically stable precipitates at 180 °C. The main strengthening effect can be attributed to the Q-Al 5Cu 2Mg 8Si 6 and β-type (i.e. Mg 2Si) precipitates due to the fact that the π-Al 8Mg 3FeSi 6 phase is relatively large in size, plate-like in morphology, and low in number density and thereby volume fraction. More importantly, the Zr addition into the Al-Si-Mg-Mn alloys causes the precipitation to start at a lower temperature during ageing, which can be due to the grain refinement effect by Zr addition and thereby enhanced diffusion. This paper provides some insights in precipitation microstructure and thereby shortening the ageing treatment at a relatively low ageing temperature. ",

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doi = "10.1016/j.matchar.2019.109820",

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AU - Vončina, Maja

AU - Medved, Jožef

AU - Kores, Stanislav

AU - Xie, Pan

AU - Schumacher, Peter

AU - LI, Jiehua

PY - 2019/9

Y1 - 2019/9

N2 - The precipitation microstructure of Al-10Si-0.5 Mg-0.5Mn (wt%) alloys with different Zr additions was investigated. The β-type (i.e. Mg 2Si) phase was observed to be dominant in the precipitation microstructure. Furthermore, the Q-Al 5Cu 2Mg 8Si 6 phase and the π-Al 8Mg 3FeSi 6 phase were also observed to be the dominant thermodynamically stable precipitates at 180 °C. The main strengthening effect can be attributed to the Q-Al 5Cu 2Mg 8Si 6 and β-type (i.e. Mg 2Si) precipitates due to the fact that the π-Al 8Mg 3FeSi 6 phase is relatively large in size, plate-like in morphology, and low in number density and thereby volume fraction. More importantly, the Zr addition into the Al-Si-Mg-Mn alloys causes the precipitation to start at a lower temperature during ageing, which can be due to the grain refinement effect by Zr addition and thereby enhanced diffusion. This paper provides some insights in precipitation microstructure and thereby shortening the ageing treatment at a relatively low ageing temperature.

AB - The precipitation microstructure of Al-10Si-0.5 Mg-0.5Mn (wt%) alloys with different Zr additions was investigated. The β-type (i.e. Mg 2Si) phase was observed to be dominant in the precipitation microstructure. Furthermore, the Q-Al 5Cu 2Mg 8Si 6 phase and the π-Al 8Mg 3FeSi 6 phase were also observed to be the dominant thermodynamically stable precipitates at 180 °C. The main strengthening effect can be attributed to the Q-Al 5Cu 2Mg 8Si 6 and β-type (i.e. Mg 2Si) precipitates due to the fact that the π-Al 8Mg 3FeSi 6 phase is relatively large in size, plate-like in morphology, and low in number density and thereby volume fraction. More importantly, the Zr addition into the Al-Si-Mg-Mn alloys causes the precipitation to start at a lower temperature during ageing, which can be due to the grain refinement effect by Zr addition and thereby enhanced diffusion. This paper provides some insights in precipitation microstructure and thereby shortening the ageing treatment at a relatively low ageing temperature.

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