All Outputs (18)

Developing neural networks to rapidly map crystallographic orientation using laser ultrasound measurements (2024)
Journal Article
Patel, R., Li, W., Smith, R. J., & Clark, M. (2025). Developing neural networks to rapidly map crystallographic orientation using laser ultrasound measurements. Scripta Materialia, 256, Article 116415. https://doi.org/10.1016/j.scriptamat.2024.116415

Rapid measurement of crystal orientation is critical in the materials discovery process as it facilitates real-time decision-making and quality control. Acoustic inspection methods rapidly characterise microstructure without the need for extensive in... Read More about Developing neural networks to rapidly map crystallographic orientation using laser ultrasound measurements.

Imaging Microstructure on Optically Rough Surfaces Using Spatially Resolved Acoustic Spectroscopy (2023)
Journal Article
Li, W., Dryburgh, P., Pieris, D., Patel, R., Clark, M., & Smith, R. J. (2023). Imaging Microstructure on Optically Rough Surfaces Using Spatially Resolved Acoustic Spectroscopy. Applied Sciences, 13(6), Article 3424. https://doi.org/10.3390/app13063424

The microstructure of a material defines many of its mechanical properties. Tracking the microstructure of parts during their manufacturing is needed to ensure the designed performance can be obtained, especially for additively manufactured parts. Me... Read More about Imaging Microstructure on Optically Rough Surfaces Using Spatially Resolved Acoustic Spectroscopy.

Measurement of the single crystal elasticity matrix of polycrystalline materials (2021)
Journal Article
Dryburgh, P., Li, W., Pieris, D., Fuentes-Domínguez, R., Patel, R., Smith, R. J., & Clark, M. (2022). Measurement of the single crystal elasticity matrix of polycrystalline materials. Acta Materialia, 225, Article 117551. https://doi.org/10.1016/j.actamat.2021.117551

Many engineering metals are polycrystalline, as such the elasticity, crystalline orientation and grain distribution are cardinal factors in determining the physical properties of the material. The grain distribution can be measured using a number of... Read More about Measurement of the single crystal elasticity matrix of polycrystalline materials.

Single pixel camera methodologies for spatially resolved acoustic spectroscopy (2021)
Journal Article
Patel, R., Sharples, S. D., Clark, M., Somekh, M. G., & Li, W. (2021). Single pixel camera methodologies for spatially resolved acoustic spectroscopy. Applied Physics Letters, 118(5), Article 051102. https://doi.org/10.1063/5.0040123

Spatially resolved acoustic spectroscopy (SRAS) is a laser ultrasound technique used to determine the crystallographic orientation (i.e. microstructure) of materials through the generation and measurement of surface acoustic wave velocity on a sample... Read More about Single pixel camera methodologies for spatially resolved acoustic spectroscopy.

Determining the crystallographic orientation of hexagonal crystal structure materials with surface acoustic wave velocity measurements (2020)
Journal Article
Lain'e, S. J., Dryburgh, P., Smith, R. J., Marrow, P., Lainé, S. J., Sharples, S. D., …Li, W. (2020). Determining the crystallographic orientation of hexagonal crystal structure materials with surface acoustic wave velocity measurements. Ultrasonics, 108, Article 106171. https://doi.org/10.1016/j.ultras.2020.106171

© 2020 Throughout our engineered environment, many materials exhibit a crystalline lattice structure. The orientation of such lattices is crucial in determining functional properties of these structures, including elasticity and magnetism. Hence, too... Read More about Determining the crystallographic orientation of hexagonal crystal structure materials with surface acoustic wave velocity measurements.

Spatially resolved acoustic spectroscopy for integrity assessment in wire–arc additive manufacturing (2019)
Journal Article
Dryburgh, P., Pieris, D., Martina, F., Patel, R., Sharples, S., Li, W., …Smith, R. J. (2019). Spatially resolved acoustic spectroscopy for integrity assessment in wire–arc additive manufacturing. Additive Manufacturing, 28, 236-251. https://doi.org/10.1016/j.addma.2019.04.015

Wire-arc additive manufacturing (WAAM) is an emergent method for the production and repair of high value components. Introduction of plastic strain by inter-pass rolling has been shown to produce grain refinement and improve mechanical properties, ho... Read More about Spatially resolved acoustic spectroscopy for integrity assessment in wire–arc additive manufacturing.

Spatially resolved acoustic spectroscopy (SRAS) microstructural imaging (2019)
Presentation / Conference Contribution
Clark, M., Clare, A., Dryburgh, P., Li, W., Patel, R., Pieris, D., …Smith, R. (2019). Spatially resolved acoustic spectroscopy (SRAS) microstructural imaging. AIP Conference Proceedings, 2102, Article 020001. https://doi.org/10.1063/1.5099705

© 2019 Author(s). Spatially resolved acoustic spectroscopy (SRAS) is an acoustic microscopy technique that can image the microstructure and measure the crystallographic orientation of grains or crystals in the material. It works by measuring the velo... Read More about Spatially resolved acoustic spectroscopy (SRAS) microstructural imaging.

Spatially resolved acoustic spectroscopy for texture imaging in powder bed fusion nickel superalloys (2019)
Presentation / Conference Contribution
Dryburgh, P., Patel, R., Pieris, D. M., Hirsch, M., Li, W., Sharples, S. D., …Clark, M. (2019). Spatially resolved acoustic spectroscopy for texture imaging in powder bed fusion nickel superalloys. AIP Conference Proceedings, 2102, Article 020004. https://doi.org/10.1063/1.5099708

© 2019 Author(s). There is a clear industrial pull to fabricate high value components using premium high temperature aerospace materials by additive manufacturing. Inconveniently, the same material properties which allow them to perform well in servi... Read More about Spatially resolved acoustic spectroscopy for texture imaging in powder bed fusion nickel superalloys.

Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing (2019)
Journal Article
Pieris, D., Patel, R., Dryburgh, P., Hirsch, M., Li, W., Sharples, S., …Clark, M. (2019). Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing. Insight - Non-Destructive Testing & Condition Monitoring, 61(3), 132-137. https://doi.org/10.1784/insi.2019.61.3.132

High-integrity engineering applications such as aerospace will not permit the incorporation of components containing
any structural defects. The current generation of additive manufacturing (AM) platforms yield components with relatively
high level... Read More about Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing.

Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing (2018)
Presentation / Conference Contribution
Milesh Pieris, D., Patel, R., Dryburgh, P., Hirsch, M., Li, W., Sharples, S. D., …Clark, M. (2018). Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing. In 57th Annual Conference of the British Institute of Non-Destructive Testing

High-integrity engineering applications such as aerospace will not permit the incorporation of components containing any structural defects. The current generation of additive manufacturing platforms yield components with relatively high levels of... Read More about Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing.

Crystallographic texture can be rapidly determined by electrochemical surface analytics (2018)
Journal Article
Speidel, A., Su, R., Mitchell-Smith, J., Dryburgh, P., Bisterov, I., Pieris, D., …Clare, A. T. (2018). Crystallographic texture can be rapidly determined by electrochemical surface analytics. Acta Materialia, 159, 89-101. https://doi.org/10.1016/j.actamat.2018.07.059

Orientation affects application-defining properties of crystalline materials. Hence, information in this regard is highly-prized. We show that electrochemical jet processing (EJP), when coupled with accurate metrological appraisal, can characterise c... Read More about Crystallographic texture can be rapidly determined by electrochemical surface analytics.

Meso-scale defect evaluation of selective laser melting using spatially resolved acoustic spectroscopy (2017)
Journal Article
Hirsch, M., Catchpole-Smith, S., Patel, R., Marrow, P., Li, W., Tuck, C., …Clare, A. T. (2017). Meso-scale defect evaluation of selective laser melting using spatially resolved acoustic spectroscopy. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 473(2205), https://doi.org/10.1098/rspa.2017.0194

Developments in additive manufacturing technology are serving to expand the potential applications. Critical developments are required in the supporting areas of measurement and in process inspection to achieve this. CM247LC is a nickel superalloy th... Read More about Meso-scale defect evaluation of selective laser melting using spatially resolved acoustic spectroscopy.

Orientation imaging of macro-sized polysilicon grains on wafers using spatially resolved acoustic spectroscopy (2017)
Journal Article
Patel, R., Li, W., Smith, R. J., Sharples, S. D., & Clark, M. (2017). Orientation imaging of macro-sized polysilicon grains on wafers using spatially resolved acoustic spectroscopy. Scripta Materialia, 140, 67-70. https://doi.org/10.1016/j.scriptamat.2017.07.003

Due to its economical production process polysilicon, or multicrystalline silicon, is widely used to produce solar cell wafers. However, the conversion efficiencies are often lower than equivalent monocrystalline or thin film cells, with the structur... Read More about Orientation imaging of macro-sized polysilicon grains on wafers using spatially resolved acoustic spectroscopy.

Comparison of grain to grain orientation and stiffness mapping by spatially resolved acoustic spectroscopy and EBSD (2017)
Journal Article
Mark, A., Li, W., Sharples, S., & Withers, P. (in press). Comparison of grain to grain orientation and stiffness mapping by spatially resolved acoustic spectroscopy and EBSD. Journal of Microscopy, https://doi.org/10.1111/jmi.12550

Our aim was to establish the capability of spatially resolved acoustic spectroscopy (SRAS) to map grain orientations and the anisotropy in stiffness at the sub-mm to micron scale by comparing the method with electron backscatter diffraction (EBSD) un... Read More about Comparison of grain to grain orientation and stiffness mapping by spatially resolved acoustic spectroscopy and EBSD.

Assessing the capability of in-situ nondestructive analysis during layer based additive manufacture (2016)
Journal Article
Hirsch, M., Patel, R., Li, W., Guan, G., Leach, R. K., Sharples, S. D., & Clare, A. T. (2017). Assessing the capability of in-situ nondestructive analysis during layer based additive manufacture. Additive Manufacturing, 13, 135-142. https://doi.org/10.1016/j.addma.2016.10.004

Unlike more established subtractive or constant volume manufacturing technologies, additive manufacturing methods suffer from a lack of in-situ monitoring methodologies which can provide informationrelating to process performance and the formation of... Read More about Assessing the capability of in-situ nondestructive analysis during layer based additive manufacture.

Spatially resolved acoustic spectroscopy for selective laser melting (2016)
Journal Article
Smith, R. J., Hirsch, M., Patel, R., Li, W., Clare, A. T., & Sharples, S. D. (2016). Spatially resolved acoustic spectroscopy for selective laser melting. Journal of Materials Processing Technology, 236, 93-102. https://doi.org/10.1016/j.jmatprotec.2016.05.005

Additive manufacturing (AM) is a manufacturing technique that typically builds parts layer by layer, for example, in the case of selective laser melted (SLM) material by fusing layers of metal powder. This allows the construction of complex geometry... Read More about Spatially resolved acoustic spectroscopy for selective laser melting.

Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation (2014)
Journal Article
Smith, R. J., Li, W., Coulson, J., Clark, M., Somekh, M. G., & Sharples, S. D. (2014). Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation. Measurement Science and Technology, 25(5), Article 055902. https://doi.org/10.1088/0957-0233/25/5/055902

Measuring the grain structure of aerospace materials is very important to understand their mechanical properties and in-service performance. Spatially resolved acoustic spectroscopy is an acoustic technique utilizing surface acoustic waves to map the... Read More about Spatially resolved acoustic spectroscopy for rapid imaging of material microstructure and grain orientation.

Determination of crystallographic orientation of large grain metals with surface acoustic waves (2012)
Journal Article
Li, W., Sharples, S. D., Smith, R. J., Clark, M., & Somekh, M. G. (2012). Determination of crystallographic orientation of large grain metals with surface acoustic waves. Journal of the Acoustical Society of America, 132(2), 738-745. https://doi.org/10.1121/1.4731226

A previously described laser ultrasonic technique known as spatially resolved acoustic spectroscopy (SRAS) can be used to image surface microstructure, using the local surface acoustic wave (SAW) velocity as a contrast mechanism. It is shown here tha... Read More about Determination of crystallographic orientation of large grain metals with surface acoustic waves.