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Manchester Metallurgical Society seminar entitled High Entropy Alloys

Dates:8 January 2019
Times:18:00 - 20:00
What is it:Seminar
Organiser:Department of Materials
How much:Free
Speaker:Dr. Ed Pickering
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High-entropy alloys (HEAs) are alloys that comprise high concentrations of five or more alloying elements, commonly in near-equiatomic ratios. Their compositions are, therefore, quite different from conventional alloys, which tend to be based around a single component. For example, popular HEAs include CrMnFeCoNi, Al0.5CrCoFeNiCu, and VNbMoTaW. Interest in HEAs is increasing exponentially at present, and they have captured the attention of many in the metallurgy community.

First reported in 2004, the HEA design philosophy has historically been based around four core effects, which the unusual compositions of HEAs should deliver: the entropic stabilisation of solid solutions, severely-strained lattices, sluggish diffusion kinetics, and the ‘cocktail effect’. In the first half of my presentation, I will introduce each of these core effects, and examine their influence on HEA properties. The second half of my presentation will highlight the opportunities that HEAs provide to the metallurgical and the wider materials science communities. Not only is there considerable scope for their development for particular applications, such as structural materials, but their study will also allow us to further develop our fundamental scientific understanding of alloy behaviour.

Price: Free

Speaker

Dr. Ed Pickering

Organisation: The University of Materials

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C15
MSS Tower
Manchester

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Dr. Ed Pickering

ed.pickering@manchester.ac.uk

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