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All Outputs (196)

Investigating mechanical characteristics of styli for micro-CMMs (2016)
Conference Proceeding
Ismail, M., Tseng, K., Claverley, J. D., Sheu, D., Chetwynd, D., & Leach, R. K. (2016). Investigating mechanical characteristics of styli for micro-CMMs.

The mechanical characteristics of styli for micro coordinate measuring machines (micro-CMMs) is of importance because of the major effect the styli have on the performance and capability of micro-CMMs. Previous work has focussed on the design of the... Read More about Investigating mechanical characteristics of styli for micro-CMMs.

Towards uncertainty in dimensional metrology of surface features for advanced manufacturing (2016)
Conference Proceeding
Musso, G., Senin, N., Galetto, M., & Leach, R. K. (2016). Towards uncertainty in dimensional metrology of surface features for advanced manufacturing.

In previous work, an original approach was developed for the dimensional characterisation of surface features on parts and test artefacts, aimed at supporting researchers involved in the study of advanced manufacturing processes. In the approach, met... Read More about Towards uncertainty in dimensional metrology of surface features for advanced manufacturing.

An integrated measurement method for complex micro-scale geometries (2016)
Conference Proceeding
Rabani, A., Senin, N., Helmli, F., Butler-Smith, P., & Leach, R. K. (2016). An integrated measurement method for complex micro-scale geometries.

Micro-scale geometries are becoming commonplace in many high-precision manufacturing applications. Micro-drilling processes, for example, are being employed for producing holes in demanding applications involving fluid transfer, atomisers and micro-m... Read More about An integrated measurement method for complex micro-scale geometries.

Phase and fringe order determination in wavelength scanning interferometry (2016)
Journal Article
Moschetti, G., Forbes, A., Leach, R. K., Jiang, X., & O'Connor, D. (2016). Phase and fringe order determination in wavelength scanning interferometry. Optics Express, 24(8), 8997-9012. https://doi.org/10.1364/OE.24.008997

A method to obtain unambiguous surface height measurements using wavelength scanning interferometry with an improved repeatability, comparable to that obtainable using phase shifting interferometry, is reported. Rather than determining the conventio... Read More about Phase and fringe order determination in wavelength scanning interferometry.

Performance assessment of a new variable stiffness probing system for micro-CMMs (2016)
Journal Article
Alblahaihid, K., Kinnell, P., Lawes, S., Desgaches, D., & Leach, R. K. (2016). Performance assessment of a new variable stiffness probing system for micro-CMMs. Sensors, 16(4), Article 492. https://doi.org/10.3390/s16040492

When designing micro-scale tactile probes, a design trade-off must be made between the stiffness and flexibility of the probing element. The probe must be flexible enough to ensure sensitive parts are not damaged during contact, but it must be stiff... Read More about Performance assessment of a new variable stiffness probing system for micro-CMMs.

Review of post-process optical form metrology for industrial-grade metal additive manufactured parts (2016)
Journal Article
Stavroulakis, P., & Leach, R. K. (2016). Review of post-process optical form metrology for industrial-grade metal additive manufactured parts. Review of Scientific Instruments, 87(4), Article 041101. https://doi.org/10.1063/1.4944983

The scope of this review is to investigate the main post-process optical form measurement technologies available in industry today and to determine whether they are applicable to industrial-grade metal additive manufactured parts. An in-depth review... Read More about Review of post-process optical form metrology for industrial-grade metal additive manufactured parts.

Review of in-situ process monitoring and in-situ metrology for metal additive manufacturing (2016)
Journal Article
Everton, S. K., Hirsch, M., Stravroulakis, P., Leach, R. K., & Clare, A. T. (2016). Review of in-situ process monitoring and in-situ metrology for metal additive manufacturing. Materials and Design, 95, 431-445. https://doi.org/10.1016/j.matdes.2016.01.099

Lack of assurance of quality with additively manufactured (AM) parts is a key technological barrier that prevents manufacturers from adopting AM technologies, especially for high-value applications where component failure cannot be tolerated. Develop... Read More about Review of in-situ process monitoring and in-situ metrology for metal additive manufacturing.

Study of manufacturing and measurement reproducibility on a laser textured structured surface (2016)
Journal Article
MacAulay, G. D., Senin, N., Giusca, C. L., & Leach, R. K. (2016). Study of manufacturing and measurement reproducibility on a laser textured structured surface. Measurement, 94, 942-948. https://doi.org/10.1016/j.measurement.2016.03.042

In recent years there has been increasing interest in the use of structured surfaces to provide specific functional performance. Such surfaces often consist of localised micro-scale surface features with predetermined geometries. The performance of t... Read More about Study of manufacturing and measurement reproducibility on a laser textured structured surface.

An international comparison of surface texture parameters quantification on polymer artefacts using optical instruments (2016)
Journal Article
Tosello, G., Haitjema, H., Leach, R. K., Quagliotti, D., Gasparin, S., & Hansen, H. (in press). An international comparison of surface texture parameters quantification on polymer artefacts using optical instruments. CIRP Annals - Manufacturing Technology, 65(1), https://doi.org/10.1016/j.cirp.2016.04.003

An international comparison of optical instruments measuring polymer surfaces with arithmetic mean height values in the sub-micrometre range has been carried out. The comparison involved sixteen optical surface texture instruments (focus variation in... Read More about An international comparison of surface texture parameters quantification on polymer artefacts using optical instruments.

Quantification and characterisation of porosity in selectively laser melted Al–Si10–Mg using x-ray computed tomography (2016)
Journal Article
Maskery, I., Aboulkhair, N., Corfield, M., Tuck, C., Clare, A., Leach, R. K., …Hague, R. J. (2016). Quantification and characterisation of porosity in selectively laser melted Al–Si10–Mg using x-ray computed tomography. Materials Characterization, 111, https://doi.org/10.1016/j.matchar.2015.12.001

We used X-ray computed tomography (CT), microscopy and hardness measurements to study Al–Si10–Mg produced by selective laser melting (SLM). Specimens were subject to a series of heat treatments including annealing and precipitation hardening. The spe... Read More about Quantification and characterisation of porosity in selectively laser melted Al–Si10–Mg using x-ray computed tomography.

Model-based defect detection on structured surfaces having optically unresolved features (2015)
Journal Article
O’Connor, D., Henning, A. J., Sherlock, B., Leach, R., Coupland, J., & Giusca, C. L. (2015). Model-based defect detection on structured surfaces having optically unresolved features. Journal of Optics A: Pure and Applied Optics, 54(30), 8872-8877. https://doi.org/10.1364/AO.54.008872

In this paper, we demonstrate, both numerically and experimentally, a method for the detection of defects on structured surfaces having optically unresolved features. The method makes use of synthetic reference data generated by an observational mode... Read More about Model-based defect detection on structured surfaces having optically unresolved features.

Surface texture measurement for additive manufacturing (2015)
Journal Article
Triantaphyllou, A., Leach, R., Giusca, C. L., Macaulay, G. D., Roerig, F., Hoebel, M., …Milne, K. A. (2015). Surface texture measurement for additive manufacturing. Measurement Science and Technology, 3, Article 024002. https://doi.org/10.1088/2051-672X/3/2/024002

The surface texture of additively manufactured metallic surfaces made by powder bed methods is affected by a number of factors, including the powder's particle size distribution, the effect of the heat source, the thickness of the printed layers, the... Read More about Surface texture measurement for additive manufacturing.

Optical metrology for digital manufacturing: A review
Conference Proceeding
Catalucci, S., Thompson, A., Eastwood, J., Piano, S., Branson, D. T., & Leach, R. Optical metrology for digital manufacturing: A review.

The so-called 4th Industrial Revolution is defined by the transformation of individual manufacturing activities into interconnected, highly efficient, flexible, and automated production flows. In this context, manufacturing processes are moving from... Read More about Optical metrology for digital manufacturing: A review.

Laser ultrasound measurement of diaphragm thickness, Young’s modulus and Poisson’s ratio in a MEMS device
Journal Article
McKee, C., Culshaw, B., & Leach, R. K. (in press). Laser ultrasound measurement of diaphragm thickness, Young’s modulus and Poisson’s ratio in a MEMS device. IEEE Journal of Selected Topics in Quantum Electronics, https://doi.org/10.1109/JSTQE.2016.2635518

Laser-generated Lamb waves, coupled with a large bandwidth Michelson interferometer, have been demonstrated to accurately measure the thickness of a MEMS pressure sensor diaphragm in the [110] direction of a silicon wafer. Using the reassigned Gabor... Read More about Laser ultrasound measurement of diaphragm thickness, Young’s modulus and Poisson’s ratio in a MEMS device.