Multi-alloying effect of Sc, Zr, Cr on the Al-Mg-Si-Mn high-pressure die casting alloys

Prach O, Trudonoshyn O, Randelzhofer P, Körner C, Durst K (2020)

Publication Language: English

Publication Type: Journal article

Publication year: 2020

Journal

Materials Characterization Elsevier

Book Volume: 168

DOI: 10.1016/j.matchar.2020.110537

Abstract

The alloying effects of small additions of Sc, Zr, Cr on the microstructure and mechanical properties of Al-5Mg-2Si casting alloys produced by High Pressure Die Casting (HPDC) were investigated. The microstructure of the Al-alloys consists primarily of the α-Al and Al-Mg₂Si eutectic cells and the α-Al₁₅(Mn,Fe)₃Si₂ intermetallic phase as well as coarse Al₇Cr and Al₃Zr intermetallic phases. The most significant improvement in the mechanical properties was achieved in the alloys with Sc + Cr and Sc + Zr additions. Alloying with 0.2 wt% of Sc in combination with Zr and Cr additions exhibits the best combination of strength and ductility with a yield strength of 206 MPa, an ultimate tensile strength of 353 MPa and an elongation of 10% in the as-cast condition. Alloys with Cr + Zr addition have a higher hardness and tensile strength compared to the AlMg5Si2Mn base alloy (commercially known as “Magsimal-59”) and the similar levels of yield strength and elongation. However, they have lower levels of all set of properties compared to the alloys with Sc + Cr and Sc + Zr additions, due to the presence of coarse Al₇Cr sludge and Al₃Zr intermetallic phases.

Authors with CRIS profile

Oleksandr Trudonoshyn Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Peter Randelzhofer Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle) Carolin Körner Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)

Involved external institutions

Technische Universität Darmstadt

Germany (DE)

How to cite

APA:

Prach, O., Trudonoshyn, O., Randelzhofer, P., Körner, C., & Durst, K. (2020). Multi-alloying effect of Sc, Zr, Cr on the Al-Mg-Si-Mn high-pressure die casting alloys. Materials Characterization, 168. https://doi.org/10.1016/j.matchar.2020.110537

MLA:

Prach, Olena, et al. "Multi-alloying effect of Sc, Zr, Cr on the Al-Mg-Si-Mn high-pressure die casting alloys." Materials Characterization 168 (2020).

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