Development of Laser Powder Bed Fusion process for Complex Concentrated Alloys (a.k.a. High Entropy Alloys)
The CDT in Advanced Metallics is a partnership between the Universities of Sheffield and Manchester and the I-Form Advanced Manufacturing Centre, Dublin. CDT students undertake the CDT training programme at all three locations throughout the 4-year programme.
Complex Concentrated Alloys (also known as High Entropy Alloys) have caused much excitement in the metallurgy community in the last decade and a half. These materials, where a relatively large number of elements (hence complex) are combined at similar fractions (hence concentrated) have been indicated to possess the potential for many desirable properties, from high strength to high stability at high temperature. It is therefore unsurprising that they have attracted interest for advanced applications, such as in aerospace. However, some of these alloys can be difficult to process by conventional means, and the complex shapes required for high-performance components means that Additive Manufacturing, where parts are built up progressively from the material in powdered form, may be the most effective solution. Much remains unknown about using such materials in such processes however.
The work will use Additive Manufacturing techniques, such as Selective Laser Melting, to process High Entropy Alloys. The aim will be to ensure suitable processing, yielding an appropriate microstructure and low defect content. Once reliable material has been processed, it will be characterised to determine its performance in additive manufactured form relative to simple casting. From this point, prototype versions of specific components could be made and tested, or the composition of the alloy altered to try and improve its Additive Manufacturability, or to generate specific material behaviours or properties which would be desirable.
• This project will involve hands-on experimental work with cutting edge manufacturing equipment, as well as the underpinning scientific investigation of the process and the material
• There is the opportunity to develop new materials and to take novel alloys from the laboratory to the prototype stage, contributing significantly to the implementation of these new materials
Current UKRI stipend plus a top-up of £2,500p.a. in year 1, and £3,500p.a. in Years 2, 3, and 4, for UK and eligible EU students.
How good is research at University of Sheffield in Electrical and Electronic Engineering, Metallurgy and Materials?
Materials Science and Engineering
FTE Category A staff submitted: 34.80
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