Job summary

The Non-Destructive Evaluation (NDE) group at Imperial College seeks to appoint a researcher to work on metal microstructure characterisation using diffuse ultrasound. Our group is well-established in the field of NDE, and have been contributing leading research, over the past three decades, on the topics of guided waves, non-destructive imaging, structural health monitoring, and material characterisation.

This position is funded by a joint EPSRC-NSF grant, collaborating with Penn State University (PSU), and will naturally involve a great deal of international collaboration. The research activities of this project aim to establish new fundamental knowledge of ultrasonic diffuse wave fields (DWFs) toward characterization of critical microstructures within metals. The DWF is formed by elastodynamic multiple scattering events at the boundaries of grain inhomogeneities, and the most important feature of the DWF is that the cross-correlation of DWF measurements recorded at two arbitrary points delivers the mean elastodynamic Green’s function, which is equivalent to the point-to-point impulse response.

Through modern measurement techniques (laser interferometer and phased array), the DWF could enable source-less, non-contact microstructure characterisations capable of operating at high temperatures, and on complex sample geometries. Main challenges include effective excitation of DWF, calibration of attenuation without multiple echoes, and inclusion of shear waves whose polarizations and speeds are unknown.

Duties and responsibilities

  • You will be characterising wave diffusion behaviours to identify and develop suitable techniques.
  • You will develop the experimental means to measure the elastodynamic Green’s tensor from localised inspections of the DWF.
  • You will establish computational simulations of development and dynamic evolution of incoherent diffuse field, using the leading capabilities at Imperial.
  • Collaboration with PSU on the theoretical development of a physical model to represent the DWF with material microstructural inputs, and experimental validations of the theories.

Essential requirements

  • You should hold (or be close to completing) a PhD/EngD in NDE related areas. You should also have an undergraduate or master’s degree in mechanical engineering.
  • You must have good knowledge on wave propagation and scattering, and experience in experimental and computational studies of these phenomenon.
  • Experience in a broad range of techniques including conventional ultrasound and laser interferometry.
  • Good theoretical analytical skills are desirable.

Further information

This is a fixed term position for up to 36 months in the first instance.

Candidates who have not yet been officially awarded their PhD will be appointed as a Research Assistant within the salary range £36,694 – £39,888 per annum.

Queries relating to the position should be directed to Dr Bo Lan at .

To apply, please click “APPLY NOW” to go through to the online application form. Should you have any queries regarding the application process please contact ME-.

The College is a proud signatory to the San-Francisco Declaration on Research Assessment (DORA), which means that in hiring and promotion decisions, we evaluate applicants on the quality of their work, not the journal impact factor where it is published. For more information, see https://www.imperial.ac.uk/research-and-innovation/about-imperial-research/research-evaluation/

The College believes that the use of animals in research is vital to improve human and animal health and welfare. Animals may only be used in research programmes which are ultimately aimed towards finding new treatments and making scientific and medical advances, and where there are no satisfactory or reasonably practical alternatives to their use. Imperial is committed to ensuring that, in cases where this research is deemed essential, all animals in the College’s care are treated with full respect, and that all staff involved with this work show due consideration at every level. http://www.imperial.ac.uk/research-and-innovation/about-imperial-research/research-integrity/animal-research/

We are committed to equality of opportunity, to eliminating discrimination and to creating an inclusive working environment for all. We therefore encourage candidates to apply irrespective of age, disability, marriage or civil partnership status, pregnancy or maternity, race, religion and belief, gender identity, sex, or sexual orientation. We are an Athena SWAN Silver Award winner, a Disability Confident Leader and a Stonewall Diversity Champion.

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