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The Future of Waste NdFeB Rare Earth Permanent Magnets and their Role in a Circular Economy
Abstract Summary

The proposed contribution is aimed at reviewing the strategies for the design of novel alloys specifically dedicated to additive manufacturing processes. Examples of running researches will be given, highlighting data about novel Aluminium alloys and Steels. In particular, some oputputs of the SPAcEMAN EIT-RM Upscaling project will be presented.



Full Abstract

Despite the large research and industrial interest on metal additive manufacturing (AM), few specific materials are available on the market for processes such as Selective Laser Melting, Electron Beam Melting, Directed Energy Deposition.
Al alloys currently used for AM mostly derive from traditional cast alloys, generally featuring poor strength, limited ductility and moderate response to thermal treatments (aging response). However, the large amount of structural parts of potential interest for AM would require a much wider and differentiated range of high-strength Al alloys.
A similar situation also holds for Fe-based alloys. Current popular steels used for AM of structural parts are limited to AISI 316L stainless steel, Maraging 18Ni300 steel and few others. These steels are selected among those already available on the market due to their good processability (often evaluated by their weldability) but they use a large amount of expensive and critical raw materials (e.g. Cr, Ni, Mo, Co) that are often not really needed.

A more rational approach is now required to defined smart strategies for the design of novel alloys specifically dedicated to additive manufacturing processes. A more careful selection of alloying elements should be made and compositions, as well as post-process thermal treatments, could be specifically developed to better exploit the peculiar solidification conditions experienced by AM materials.


PS6 - Resource Efficiency Cities

Submitted on

Wed Feb 13 2019 16:32:34 GMT+0000 (Coordinated Universal Time)


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