Investigation of the precipitation kinetics of a new Al-Mg-Sc-Zr alloy

Johannes Tändl; Frank Palm; Kevin Anders; Rudolf Gradinger; Maria Cecilia Poletti

doi:10.4028/www.scientific.net/MSF.794-796.1038

Investigation of the precipitation kinetics of a new Al-Mg-Sc-Zr alloy

Johannes Tändl^*, Frank Palm, Kevin Anders, Rudolf Gradinger, Maria Cecilia Poletti

^*Corresponding author for this work

Institute of Materials Science, Joining and Forming (3030)

Research output: Contribution to journal › Article › peer-review

Abstract

This study investigates the precipitation behavior of two similar cast Al-Mg-Sc-Zr alloys with different solidification and cooling rates. Microstructural analyses and hardness testing were performed after casting and ageing. In addition, the precipitation and hardness evolution after rapid quenching using electron beam re-solidification were studied. It was shown that the amount of Al3(Sc,Zr) phases present after casting or re-solidification increases with decreasing solidification and cooling rate. Consequently, the degree of supersaturation in Sc and Zr at room temperature and thus the hardening potential in a subsequent ageing process increases with the solidification and cooling rate. Therefore, the electron beam re-solidified samples revealed the most pronounced hardening.

Original language	English
Pages (from-to)	1038-1043
Journal	Materials Science Forum
Volume	794-796
DOIs	https://doi.org/10.4028/www.scientific.net/MSF.794-796.1038
Publication status	Published - 2014

Keywords

AlSc alloys
Precipitation strengthening
Rapid solidification
Electron beam welding

Fields of Expertise

Advanced Materials Science

Treatment code (Nähere Zuordnung)

Basic - Fundamental (Grundlagenforschung)
Experimental

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10.4028/www.scientific.net/MSF.794-796.1038

Cite this

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title = "Investigation of the precipitation kinetics of a new Al-Mg-Sc-Zr alloy",

abstract = "This study investigates the precipitation behavior of two similar cast Al-Mg-Sc-Zr alloys with different solidification and cooling rates. Microstructural analyses and hardness testing were performed after casting and ageing. In addition, the precipitation and hardness evolution after rapid quenching using electron beam re-solidification were studied. It was shown that the amount of Al3(Sc,Zr) phases present after casting or re-solidification increases with decreasing solidification and cooling rate. Consequently, the degree of supersaturation in Sc and Zr at room temperature and thus the hardening potential in a subsequent ageing process increases with the solidification and cooling rate. Therefore, the electron beam re-solidified samples revealed the most pronounced hardening. ",

keywords = "AlSc alloys, Precipitation strengthening, Rapid solidification, Electron beam welding",

author = "Johannes T{\"a}ndl and Frank Palm and Kevin Anders and Rudolf Gradinger and Poletti, {Maria Cecilia}",

year = "2014",

doi = "10.4028/www.scientific.net/MSF.794-796.1038",

language = "English",

volume = "794-796",

pages = "1038--1043",

journal = "Materials Science Forum",

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T1 - Investigation of the precipitation kinetics of a new Al-Mg-Sc-Zr alloy

AU - Tändl, Johannes

AU - Palm, Frank

AU - Anders, Kevin

AU - Gradinger, Rudolf

AU - Poletti, Maria Cecilia

PY - 2014

Y1 - 2014

N2 - This study investigates the precipitation behavior of two similar cast Al-Mg-Sc-Zr alloys with different solidification and cooling rates. Microstructural analyses and hardness testing were performed after casting and ageing. In addition, the precipitation and hardness evolution after rapid quenching using electron beam re-solidification were studied. It was shown that the amount of Al3(Sc,Zr) phases present after casting or re-solidification increases with decreasing solidification and cooling rate. Consequently, the degree of supersaturation in Sc and Zr at room temperature and thus the hardening potential in a subsequent ageing process increases with the solidification and cooling rate. Therefore, the electron beam re-solidified samples revealed the most pronounced hardening.

AB - This study investigates the precipitation behavior of two similar cast Al-Mg-Sc-Zr alloys with different solidification and cooling rates. Microstructural analyses and hardness testing were performed after casting and ageing. In addition, the precipitation and hardness evolution after rapid quenching using electron beam re-solidification were studied. It was shown that the amount of Al3(Sc,Zr) phases present after casting or re-solidification increases with decreasing solidification and cooling rate. Consequently, the degree of supersaturation in Sc and Zr at room temperature and thus the hardening potential in a subsequent ageing process increases with the solidification and cooling rate. Therefore, the electron beam re-solidified samples revealed the most pronounced hardening.

KW - AlSc alloys

KW - Precipitation strengthening

KW - Rapid solidification

KW - Electron beam welding

U2 - 10.4028/www.scientific.net/MSF.794-796.1038

DO - 10.4028/www.scientific.net/MSF.794-796.1038

M3 - Article

SN - 1662-9752

VL - 794-796

SP - 1038

EP - 1043

JO - Materials Science Forum

JF - Materials Science Forum

ER -

Investigation of the precipitation kinetics of a new Al-Mg-Sc-Zr alloy

Abstract

Keywords

Fields of Expertise

Treatment code (Nähere Zuordnung)

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