Imperial College London

DrAlexanderKnowles

Faculty of EngineeringDepartment of Materials

EPSRC Doctoral Prize Fellow
 
 
 
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Contact

 

a.knowles

 
 
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Location

 

Royal School of MinesSouth Kensington Campus

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Summary

 

Summary

My research focuses on the design and development of new engineering alloys for extreme environments, namely for gas turbines and nuclear fusion. My work has been funded by the EPSRC ‘Designing Alloys for Resource Efficiency (DARE)’ project (darealloys.org), and is now supported by an EPSRC Doctoral Prize Fellowship 2016–17, after which I have been awarded a EURO-Fusion Researcher Grant Fellowship 2017-19 (euro-fusion.org) linked with CCFE (ccfe.ac.uk).

One direction of my work focuses on the design and production of new bcc refractory metal rich beta titanium alloys reinforced with intermetallic precipitates that adopt a bcc superlattice structure. Alloys have been produced that comprise remarkable ultra-fine lamellar bulk nano-structures, which have demonstrated exceptionally high strengths. Further development of these alloys toward aerospace applications is being made through my EPSRC Doctoral Prize Fellowship, while their optimisation and exploitation toward nuclear fusion applications will be undertaken through my EURO-Fusion Researcher Grant Fellowship.

A second direction of my work supports the development of new TIMETAL 575 and 407 commercial titanium alloys and the characterisation methods that accelerate the path to commercialisation in collaboration with TIMET. On TIMETAL 575, the mechanisms of Si strengthening additions are being studied using advanced electron microscopy and mechanical testing. While detailed fatigue studies are being performed at multiple lengthscales on TIMETAL 407, so as to further understand its impressive fatigue performance.

Publications

Journals

Knowles AJ, Jones NG, Mess̩ OMDM, et al., 2016, Phase equilibria in the Fe-Mo-Ti ternary system at 1000ʡC, International Journal of Refractory Metals and Hard Materials, Vol:60, ISSN:0263-4368, Pages:160-168

Knowles AJ, Jiang X, Galano M, et al., 2015, Microstructure and mechanical properties of 6061 Al alloy based composites with SiC nanoparticles, Journal of Alloys and Compounds, Vol:615, ISSN:0925-8388, Pages:S401-S405

More Publications