Aluminium Alloys for Additive Manufacturing by Laser Powder Bed Fusion
EXAMPLE OF HOW TO USE THIS TOOL
The points in the diagram show compositions with a melting interval smaller than 200 degrees (marked in the left hand bar).
The y-axis of the diagram shows the melting interval, and the x-axis shows the mass % Fe (selected in the bottom left part of the page).
The dashed blue lines show that below the marked Fe content the melting interval is kept low.
A tool for selecting aluminium alloy compositions for additive manufacturing by laser powder bed fusion.
Laser Powder Bed Fusion opens new alloying possibilities. Primary precipitation of unwanted phases can be avoided since solidification and cooling is rapid. The supersaturated solid phase that is formed can be strengthened by precipitation of tailored secondary precipitates.
The first step in an alloy design could be to find a matrix phase that is resistant to hot cracking.
This tool can be used to select compositions that will give a low melting interval to minimize the risk for hot cracks. Alloy compositions with a defined melting interval can easily be picked out. Supersaturation from rapid solidification is considered.
The following composition ranges are treated: Al (base), 0-6wt%Mn, 0-2wt%Mg, 0-4wt%Cr, 0-1wt%Zr, 0-1wt%Sc, 0-1.4wt%Fe, 0-1.4wt%Si.
