Latest Papers

A study of dislocation transmission through a grain boundary in hcp Ti-6Al using micro-cantilevers
R Ding, J Gong, AJ Wilkinson, IP Jones
Acta Materialia (2016) vol. 103, 416-423

〈a〉 Prismatic, 〈a〉 basal, and 〈c+a〉 slip strengths of commercially pure Zr by micro-cantilever tests
J Gong, TB Britton, MA Cuddihy, FPE Dunne, AJ Wilkinson
Acta Materialia (2015) vol. 96, 249-257

Measurements of stress fields near a grain boundary: Exploring blocked arrays of dislocations in 3D
Y Guo, DM Collins, E Tarleton, F Hofmann, J Tischler, W Liu, R Xu, AJ Wilkinson, TB Britton
Acta Materialia (2015) vol. 96, 229-236

On the mechanistic basis of deformation at the microscale in hexagonal close-packed metals
TB Britton, FPE Dunne, AJ Wilkinson
Proceedings of the Royal Society A (2015) vol. 471, 20140881

Evolution of intragranular stresses and dislocation densities during cyclic deformation of polycrystalline copper
J Jiang, TB Britton, AJ Wilkinson
Acta Materialia (2015) vol. 94, 193-204

The orientation and strain dependence of dislocation structure evolution in monotonically deformed polycrystalline copper
J Jiang, TB Britton and AJ Wilkinson
International Journal of Plasticity (2015) vol. 69, 102-117

A synchrotron X-ray diffraction study of in situ biaxial deformation
DM Collins, M Mostafavi, RI Todd, T Connolley and AJ Wilkinson
Acta Materialia (2015) vol. 90, 46-58

Ed Tarleton Awarded EPSRC Early Career Fellowship
Congratulation to Ed Tarleton on the award of his EPSRC Fellowship on Dislocation based modelling of deformation and fracture in real engineering alloys. The five years funding will allow Ed to continue his inovative modelling work. Developing simulations that capture the rich and complex interactions between, dislocations, diffusion, precipitate formation and fracture is central to Ed's work. Such capabilies are vital for us to maximise the understanding and therefore impact of many of the experimental programmes within the Micromechanics group. Ed is looking to grow his team in the near future and will be recruiting at both post-doc and doctoral student level.

Ed T
DMC Diamond-Infineum award photo

Diamond-Infineum ECR Prize for David Collins
David Collins has been awarded the Diamond-Infineum Early Career Researcher Prize for outstanding work produced using Diamond’s facilities in a research area relevant to the automotive sector. David received the award at the Illuminating Challenges in Automotive Research Conference where he was invited to present his award winning work on in-situ biaxial deformation. Congratulations David - its well deserved.

Pair of Acta Materialia Papers on Twinning
Hamidreza Abdolvand has published a pair of papers on deformation twinning in Zircaloy-2. The first paper reports on experimental measurements made at ESRF beamline ID11 using the 3D-XRD method developed by the Riso/DTU group. During an in situ tensile study the method was used to characterise the size, position, orientation and average lattice strain state in grains within a sample volume of ~0.8x0.8x0.9mm. There were a little over 6100 grains in the sample volume a the start of the experiment but after ~2.8% strain twinning meant that the same volume was segmented into over 9700 grains. The progressive increase in lattice strains and amount of twinning was followed using observations at 7 different strain levels. In the second paper results are presented from a large (2600 grain) CP-FEA simulation using a microstructure constructed from the 3D-XRD data. The model captures the twinning well. The stresses in twin and parent gran pairs are examined just after twin formation for both experimental and simulated results. A significant finding is that local normal stresses in the twin and parrent pairs both normal to the twin habit plane and along the twin shear direction are essentially identical.

Hamid A 3DXRD Zr twining
Meet us at

ICM12 2015
12th Int Conf on Mechanical Behaiour of Materials

KIT, Germany, 10–14 May 2015
- Junnan Jiang will be presenting on micromechanical testing of grain boundary sliding

ICMM 2015
4th Int Conf on Material Modeling

Berkeley CA, 27–29 May 2015
- several members of the group will be attending and Hamid A will be presenting

M and M 2015
Microscopy and Microanalysis 2015

Portland, OR, 2-6 August 2015
- presentations by Angus W on 'progress with EBSD strain mapping', and Arantxa V-C on 'EBSD strain mapping in III-V nitride' and on 'Transmission Kikuchi Diffraction'

Int Conf on Strength of Materials 2015

Brno, Czech Republic, 9–14 August 2015
- several members of the group will be attending and hopefully presenting talks and posters

ECI nanomechanics
Nanomechanical Testing of Materials V

Albufeira, Portugal, 4-9 October 2015
- Angus W and Jicheng G will be attending and presenting talks/posters