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

被引：21

作者：

Prach, O. ^{[1
]}

Trudonoshyn, O. ^{[2
,3
]}

Randelzhofer, P. ^{[2
]}

Koerner, C. ^{[2
]}

Durst, K. ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Alarich Weiss Str 2, D-64287 Darmstadt, Germany

[2] Friedrich Alexander Univ Erlangen Nurnberg, Martensstr 5, D-91058 Erlangen, Germany

[3] Vyatskiy State Univ, Moscow St 36, Kirov 610000, Kirov Region, Russia

来源：

MATERIALS CHARACTERIZATION | 2020年 / 168卷

关键词：

Al-alloys; HPDC; Chromium; Zirconium; Scandium; Mechanical properties; MECHANICAL-PROPERTIES; PRECIPITATION; DISPERSOIDS; CHROMIUM; CU; MICROSTRUCTURES; SCANDIUM; TEM;

D O I：

10.1016/j.matchar.2020.110537

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 alpha-Al and Al-Mg2Si eutectic cells and the alpha-Al-15 (Mn,Fe)(3)Si-2 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.

引用

页数：8

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