High Entropy Alloys for Automotive Applications (Advanced Metallic Systems Centre for Doctoral Training)

Mankind has used metals for thousands of years, but new discoveries and new approaches are still being introduced. Among these is the concept of High Entropy Alloys, a philosophy in alloy design which dates back to experiments reported less than 15 years ago. The key observation was that, unlike traditional alloys based on one element with minor additions to improve properties, similar amounts of many elements (typically five or more) could be combined and produce alloys with intriguing and promising properties. The name derives from the theory that it is the enhanced entropy present in these combinations which promotes mixing, rather than separation, of the components. This philosophy opens up a very large number of potential combinations of elements in different amounts, and a vast array of new alloys to explore.

New alloys are continually in demand. Greater efficiency and performance can be achieved in many applications by alloys that are stronger, lighter or in other ways enhanced. This is particularly true of automotive applications, where greater efficiency is essential for energy and environmental considerations. HEAs offer a design potential to meet and exceed some of the current goals for components in vehicles, but there needs to be greater understanding of how to design with them and experimental evidence of the performance they can achieve.

In this project we will work with HEAs formed from suitable elements for application in the automotive sector (such as Fe, Ni, Cu, Al, although not limited to these). We will attempt to understand the ways in which these elements combine, or the reasons why they do not combine, achieving fundamental understanding of the interactions of the atoms in HEAs. This knowledge will be used as design rules for the creation of new alloys. Small samples of the new alloys identified will be made in the laboratory and characterised for their structure and properties, with promising compositions scaled up for further investigation in close collaboration with the industrial partner and supply chain.

The work would be suitable for researchers with a background in engineering or physical sciences such as physics or chemistry. Further discussion of the project and how the scope matches different fields would be welcomed by contacting Dr Russell Goodall ([Email Address Removed]).

The Advanced Metallic Systems CDT is a 4 year programme hosted jointly by the universities of Manchester and Sheffield building on their complimentary expertise and international reputations in materials science and engineering research. In year 1, students from a range of disciplinary backgrounds undertake taught courses in core materials topics. PhD research begins after 6 months. Our transferable skills and personal development programme leads to a Diploma in Professional Skills. Visit our website for more information www.metallicsCDT.co.uk.