Latest Papers

Strong grain neighbour effects in polycrystals
H Abdolvand, JP Wight, AJ Wilkinson
Nature Communications (2018) vol. 9, 171
doi:10.1038/s41467-017-02213-9


On the state of deformation in a polycrystalline material in three-dimension: Elastic strains, lattice rotations, deformation mechanisms
H Abdolvand, JP Wight, AJ Wilkinson
International Journal of Plasticity (2018) in press - corrected proof
doi:10.1016/j.ijplas.2018.03.006


Microstructural degradation of polycrystalline superalloys from oxidized carbides and implications on crack initiation
P Kontis, DM Collins, AJ Wilkinson, RC Reed, D Raabe, B Gault
Scripta Materialia (2018) vol. 147, 59-63
doi:10.1016/j.scriptamat.2017.12.028


Size effects resolve discrepancies in 40 years of work on low-temperature plasticity in olivine
KM Kumamoto, CA Thom, D Wallis, LN Hansen, DEJ Armstrong, JM Warren, DL Goldsby, AJ Wilkinson
Scientific Advances (2017) vol. 3, e1701338
doi:10.1126/sciadv.1701338


Dislocation Interactions in Olivine Revealed by HR-EBSD
D Wallis, LN Hansen, TB Britton, AJ Wilkinson
Journal of Geophysical Research: Solid Earth (2017) vol. 122, 10916
doi:10.1002/2017JB014513


On the microtwinning mechanism in a single crystal superalloy
D Barba , E Alabort, S Pedrazzini, DM Collins, AJ Wilkinson, PAJ Bagot, MP Moody, C Atkinson, A. Jerusalem, RC Reed
Acta Materialia (2017) vol. 135, 314-329
doi:10.1016/j.actamat.2017.05.072


News

Front Cover of Journal of Microscopy
Have belatedly realised our work was on the front cover of Journal of Microscopy in Septmeber last year. The front cover image shows dislocations threading through a GaN layer grown from a patterned substrate. The dislocations are revealed through channelling contrast using signal integrated from the low take-off angle region of an array of EBSD patterns. The paper describes how images revealling different features of the sample can be generated from the stack of EBSD patterns. The microscopy and data collection was carried out by Arrantxa Vilalta-Clemente while Aimo Winkelmann (Bruker Nano) analysed the data and rendered the images


JMicroscopy front cover
Post-Doc position with Ed Tarleton
Microcantilever video 3D
Ed Tarleton is currently seeking a talented researcher to join his growing team of micromechanical modellers. The post holder will work on an exceiting Discrete Dislocation Dynamics project within the MAINTAiN programme (Multi-scAle INTegrity assessment for Advanced high-temperature Nuclear systems).
The application deadline is 19th February - see here for further details


3D-XRD study published in Nature Comms
High value hexagonal alloys Ti and Zr are used in safety critical applications in the aerospace and nuclear industries. Understanding and improving their performance requires untangling the complex patterning of stress and strain at the microstructural level. The MicroMechanics Group has used 3D-X-ray Diffraction, coupled with crystal plasticity FEM simulations, to study stress evolution across thousands of contiguous grains in polycrystals loaded in situ at the ESRF ID11. Large anisotropy in elastic stiffness, thermal expansion and plastic flow stress in these materials ensure that the local grain neighbourhood has a profound effect on stress development in any particular grain. Indeed the neighbourhood effect is so strong that for many grains the stress level can actually drop despite the global stress state increasing during tensile plastic flow.
The work is available in Nature Communications.
3D-XRD
Meet us at


Shcoental Symposium
3rd Schöntal Symposium on Dislocation Plasticity

Kloster Schöntal, Germany, 26 Feb-1 March 2018
- Ed Tarleton will be taking grad students Bruce Bromage and Daniel Celis-Garza on retreat to Schöntal monastry


TMS 2018
TMS 2018

Phoenix, AZ, 11-15 March 2018
- several members of the group will be attending including Dave Collins, Jicheng Gong and AJW


RMS 2017
RMS Workshop and Conference on EBSD 2018

Plymouth, UK, 9-11th April 2018
- new venue for the meeting this year hosted by Natasha Stephen, Earth and Planetary Sciences


MSA-EBSD18
EBSD2018 - MSA Topical Conference

Michigan University, Ann Arbor, Michigan, USA, 23rd-25th May 2018


UK-Israel-workshop
UK-Israel Workshop on Nano Scale Crystallography

Tel Aviv University, Israel, 18th-19th June 2018


ICSMA18
International Conference on Strength of Materials

The Ohio State University, Columbus, Ohio, USA, 15th-19th July 2018