Outputs (19)

Noncontact measurement of bolt axial force in tightening processes using scattered laser ultrasonic waves (2023)
Journal Article
Kitazawa, S., Lee, Y., & Patel, R. (2023). Noncontact measurement of bolt axial force in tightening processes using scattered laser ultrasonic waves. NDT and E International, 137, Article 102838. https://doi.org/10.1016/j.ndteint.2023.102838

This paper presents a new methodology for noncontact measurement of the axial force of bolts in their tightening processes using laser-generated ultrasound waves. This method employs ultrasound waves scattered in a bolt shaft to detect axial force ch... Read More about Noncontact measurement of bolt axial force in tightening processes using scattered laser ultrasonic waves.

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.

Simple method of measuring thicknesses of surface-hardened layers by laser ultrasonic technique (2021)
Journal Article
Lee, Y., Kitazawa, S., & Patel, R. (2021). Simple method of measuring thicknesses of surface-hardened layers by laser ultrasonic technique. Japanese Journal of Applied Physics, 60(7), Article 072002. https://doi.org/10.35848/1347-4065/ac030f

We proposed a simple non-contact inspection method using a laser ultrasonic technique to measure the thickness of a surface-hardened layer. This measurement is based on the dependence of a surface-wave velocity on the thickness of the hardened layers... Read More about Simple method of measuring thicknesses of surface-hardened layers by laser ultrasonic technique.

Non-destructive detection of machining-induced white layers through grain size and crystallographic texture-sensitive methods (2021)
Journal Article
Brown, M., Pieris, D., Wright, D., Crawforth, P., M'Saoubi, R., McGourlay, J., Mantle, A., Patel, R., Smith, R. J., & Ghadbeigi, H. (2021). Non-destructive detection of machining-induced white layers through grain size and crystallographic texture-sensitive methods. Materials and Design, 200, Article 109472. https://doi.org/10.1016/j.matdes.2021.109472

Detection of machining-induced white layers is currently a destructive inspection process with a form of cross-sectional microscopy required. This paper, therefore, reports on the development of a novel non-destructive inspection method for detecting... Read More about Non-destructive detection of machining-induced white layers through grain size and crystallographic texture-sensitive methods.

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., Clare, A. T., Williams, S., & 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 Towards Online Inspection of Additive Manufacturing (2019)
Journal Article
Pieris, D., Patel, R., Dryburgh, P., Hirsch, M., Li, W., Sharples, S., Smith, R., Clare, A., & 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., Smith, R. J., Clare, A. T., & Clark, M. (2018, September). Spatially Resolved Acoustic Spectroscopy Towards Online Inspection of Additive Manufacturing. Presented at NDT 2018 - 57th Annual Conference of the British Institute of Non-Destructive Testing, Nottingham, UK

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.

Imaging material texture of as-deposited selective laser melted parts using spatially resolved acoustic spectroscopy (2018)
Journal Article
Patel, R., Hirsch, M., Dryburgh, P., Pieris, D., Achamfuo-Yeboah, S., Smith, R., Light, R., Sharples, S., Clare, A., & Clark, M. (2018). Imaging material texture of as-deposited selective laser melted parts using spatially resolved acoustic spectroscopy. Applied Sciences, 8(10), Article 1991. https://doi.org/10.3390/app8101991

Additive manufacturing (AM) is a production technology where material is accumulated to create a structure, often through added shaped layers. The major advantage of additive manufacturing is in creating unique and complex parts for use in areas wher... Read More about Imaging material texture of as-deposited selective laser melted parts using spatially resolved acoustic spectroscopy.

Targeted rework of powder bed fusion additive manufacturing (2018)
Presentation / Conference Contribution
Dryburgh, P., Patel, R., Catchpole-Smith, S., Hirsch, M., Parry, L., Smith, R. J., Clark, M., Ashcroft, I. A., & Clare, A. T. (2018, June). Targeted rework of powder bed fusion additive manufacturing. Presented at 19th International Symposium on Laser Precision Microfabrication

There is a clear industrial pull to fabricate high value components using premium high temperature aerospace materials by additive manufacturing. Inconveniently, the same materials’ properties which allow them to perform well in service render them... Read More about Targeted rework of powder bed fusion additive manufacturing.