The Influence of Sc and Zr Additions on the Extrusion Performance of a 6005A Alloy

Document Type

Conference Proceeding

Publication Date

2-23-2026

Department

Department of Materials Science and Engineering

Abstract

TextureTexture and the peripheral coarse grain (PCGPeripheral Coarse Grain (PCG)) in 6xxxAl-Mg-Si alloys (6xxx)aluminumAluminumextrusionsExtrusion affect mechanical propertiesMechanical properties and bendability. ExtrusionExtrusion temperature and speed influence textureTextureand PCGPeripheral Coarse Grain (PCG) layer formation, but dispersoidsDispersoids can counteract these effects. It is proposed that additions of Sc and Zr dispersoidDispersoids formers will aid in reducing recrystallized textureTextureand PCGPeripheral Coarse Grain (PCG) size given their smaller size and greater number compared to traditional dispersoidsDispersoids. Two alloys, 6005A6005A and 6005+, where Sc and Zr replaced the Cr and Mn additions, were cast and extruded at two speeds and temperatures followed by press quenching. The 6005+ alloy has higher YS and UTS but lower ductility and bendability. EBSDElectron Back-Scattered Diffraction (EBSD) showed that both alloys had similar fractions of recrystallized textureTexture component, but the 6005+ alloy had the thinnest PCGPeripheral Coarse Grain (PCG) layer, except at the highest extrusionExtrusion temperature and speed.

Publication Title

Minerals Metals and Materials Series

ISBN

9783032138316

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