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The University of Southampton

Research project: Tribological behaviour of nano-structured alloys processed by Severe Plastic Deformation

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Severe plastic deformation (SPD) processes (including equal channel angular pressing (ECAP) and high pressure torsion (HPT)) are enabled to create nanocrystalline microstructures.  The nanoscale materials processed to date have demonstrated novel and often extraordinary properties such as high strength, good ductility and superplasticity.

Materials with submicron- or nano-scaled grains produced by ECAP and HPT offer new structural and functional properties for innovative products in a wide range of applications.  Experiments have shown that traditional Amontons' laws for frictional force cannot be used successfully for nano scale microstructures.  Also, there exists significant differences between the micro contacts and macro contacts.  The aims of the project are to investigate the tribological behaviours of nanostructural alloys formed by SPD, including wear and friction; to study the microstructural evolution and surface stress distribution of SPD materials; and also to model surface work hardening behaviours through the finite element method and other analytical models.

Related research groups

national Centre for Advanced Tribology at Southampton (nCATS)
Example of the SVP process
Example of the SVP process
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