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Professor RICHARD LEACH's Outputs (39)

Results of an industrial survey on the use of surface texture parameters (2017)
Presentation / Conference Contribution
Todhunter, L. D., Leach, R., & Lawes, S. Results of an industrial survey on the use of surface texture parameters. Presented at Met & Props 2017: the 16th International Conference on Metrology and Properties of Engineering Surfaces

In 1999, CIRP conducted an industrial survey of the use of surface texture parameters [1]. In the seventeen years since, much has changed, with the most important advancement being the introduction of areal surface texture parameters as described in... Read More about Results of an industrial survey on the use of surface texture parameters.

Design of mechanically-optimised lattice structures for vibration isolation (2017)
Presentation / Conference Contribution
Syam, W. P., Jianwei, W., Zhao, B., Maskery, I., & Leach, R. K. Design of mechanically-optimised lattice structures for vibration isolation. Presented at euspen's 17th International Conference & Exhibition

In this study, we investigate the use of additively manufactured strut-based lattice structures to enhance the mechanical vibration isolation properties of a structure. Three lattice designs, inspired by the common strut-based lattice structures, are... Read More about Design of mechanically-optimised lattice structures for vibration isolation.

Detecting the signature of motion stage non-linearity for focus variation microscopy using measurement noise and surface topography repeatability (2017)
Presentation / Conference Contribution
Alburayt, A., Syam, W. P., & Leach, R. Detecting the signature of motion stage non-linearity for focus variation microscopy using measurement noise and surface topography repeatability. Presented at 16th Conference on Metrology and Properties of Engineering Surfaces

Measurement noise is one of the ISO-proposed metrological characteristics of areal surface texture instruments [1, 2, 3, 4]. Measurement noise includes all of the unwanted contributions to the output signals when the instrument is used in its normal... Read More about Detecting the signature of motion stage non-linearity for focus variation microscopy using measurement noise and surface topography repeatability.

Measurement noise of a point autofocus surface topography instrument (2017)
Presentation / Conference Contribution
Feng, X., Quagliotti, D., Maculotti, G., Syam, W. P., Tosello, G., Hansen, H. N., Galetto, M., & Leach, R. Measurement noise of a point autofocus surface topography instrument. Presented at 16th Conference on Metrology and properties of Engineering Surfaces

Optical instruments for areal topography measurement can be especially sensitive to noise when scanning is required. Such noise has different sources, including those internally generated and external sources from the environment [1].For some instrum... Read More about Measurement noise of a point autofocus surface topography instrument.

Coherence scanning interferometry for additive manufacture (2017)
Presentation / Conference Contribution
Gomez, C., Thompson, A., DiSciacca, J., Lawes, S., & Leach, R. Coherence scanning interferometry for additive manufacture. Presented at 16th Conference on Metrology and properties of Engineering Surfaces

Additive manufacture (AM) of metal components is a rapidly maturing technology; but given the large number of interrelated process parameters, it remains difficult to control to high precision. It has been observed that processing conditions may be a... Read More about Coherence scanning interferometry for additive manufacture.

Focus variation measurement of electron beam melted surfaces (2017)
Presentation / Conference Contribution
Newton, L., Senin, N., & Leach, R. Focus variation measurement of electron beam melted surfaces. Presented at 16th Conference on Metrology and properties of Engineering Surfaces

Electron beam melting (EBM) is a promising additive manufacturing process which is seeing increasing use in high value manufacturing sectors such as aerospace [1]. With its layer-by-layer approach, EBM can allow the creation of parts of complex shape... Read More about Focus variation measurement of electron beam melted surfaces.

X-ray computed tomography of additively manufactured metal parts: the effect of magnification and reconstruction sampling on surface topography measurement (2017)
Presentation / Conference Contribution
Thompson, A., Körner, L., Senin, N., Lawes, S., Leach, R., & Maskery, I. X-ray computed tomography of additively manufactured metal parts: the effect of magnification and reconstruction sampling on surface topography measurement. Presented at 16th Conference on Metrology and properties of Engineering Surfaces

X-ray computed tomography (XCT) has recently become recognised as a viable method of surface topography measurement for additively manufactured (AM) metal parts [1–5]. AM is capable of producing internal features that are inaccessible to other surfac... Read More about X-ray computed tomography of additively manufactured metal parts: the effect of magnification and reconstruction sampling on surface topography measurement.

An industrial survey on the use of surface texture parameters (2017)
Presentation / Conference Contribution
Todhunter, L. D., Leach, R., & Lawes, S. D. An industrial survey on the use of surface texture parameters. Presented at 16th Conference on Metrology and properties of Engineering Surfaces

In 1999, CIRP conducted an industrial survey of the use of surface texture parameters [1]. In the seventeen years since, much has changed, with the most important advancement being the introduction of areal surface texture parameters as described in... Read More about An industrial survey on the use of surface texture parameters.

Tolerance on sphere radius for the calibration of the transfer function of coherence scanning interferometry (2017)
Presentation / Conference Contribution
Su, R., Coupland, J. M., Wang, Y., & Leach, R. K. (2017, June). Tolerance on sphere radius for the calibration of the transfer function of coherence scanning interferometry. Presented at SPIE Optical Metrology, Munich, Germany

Although coherence scanning interferometry (CSI) commonly achieves a sub-nanometre noise level in surface topography measurement, the absolute accuracy is difficult to determine when measuring a surface that contains varying local slope angles and cu... Read More about Tolerance on sphere radius for the calibration of the transfer function of coherence scanning interferometry.

X-ray computed tomography and additive manufacturing in medicine: a review (2017)
Journal Article
Thompson, A., McNally, D., Maskery, I., & Leach, R. K. (in press). X-ray computed tomography and additive manufacturing in medicine: a review. International Journal of Metrology and Quality Engineering, 8, Article 17. https://doi.org/10.1051/ijmqe/2017015

The use of X-ray computed tomography (XCT) with additive manufacture (AM) within a medical context is examined in this review. The seven AM process families and various XCT scanning techniques are explained in brief, and the use of these technologies... Read More about X-ray computed tomography and additive manufacturing in medicine: a review.

An analysis of type F2 software measurement standards for profile surface texture parameters (2017)
Journal Article
Todhunter, L. D., Leach, R. K., Lawes, S., & Blateyron, F. (2017). An analysis of type F2 software measurement standards for profile surface texture parameters. Measurement Science and Technology, 28(6), Article 065017. https://doi.org/10.1088/1361-6501/aa6924

This paper reports on an in-depth analysis of ISO 5436 part 2 type F2 reference software for the calculation of profile surface texture parameters that has been performed on the input, implementation and output results of the reference software devel... Read More about An analysis of type F2 software measurement standards for profile surface texture parameters.

Topography of selectively laser melted surfaces: A comparison of different measurement methods (2017)
Journal Article
Thompson, A., Senin, N., Giusca, C. L., & Leach, R. K. (2017). Topography of selectively laser melted surfaces: A comparison of different measurement methods. CIRP Annals - Manufacturing Technology, 66(1), 543-546. https://doi.org/10.1016/j.cirp.2017.04.075

Selective laser melting (SLM) of metals produces surface topographies that are challenging to measure. Multiple areal surface topography measurement technologies are available, which allow reconstruction of information rich, three-dimensional digital... Read More about Topography of selectively laser melted surfaces: A comparison of different measurement methods.

Verification of micro-scale photogrammetry for smooth three-dimensional object measurement (2017)
Journal Article
Sims-Waterhouse, D., Piano, S., & Leach, R. (2017). Verification of micro-scale photogrammetry for smooth three-dimensional object measurement. Measurement Science and Technology, 28(5), Article 055010. https://doi.org/10.1088/1361-6501/aa6364

© 2017 IOP Publishing Ltd. By using sub-millimetre laser speckle pattern projection we show that photogrammetry systems are able to measure smooth three-dimensional objects with surface height deviations less than 1 μm. The projection of laser speckl... Read More about Verification of micro-scale photogrammetry for smooth three-dimensional object measurement.

Optical difference engine for defect inspection in highly-parallel manufacturing processes (2017)
Presentation / Conference Contribution
Feng, X., Su, R., Liu, M., & Leach, R. K. Optical difference engine for defect inspection in highly-parallel manufacturing processes. Presented at 12th International Conference and Exhibition on Laser Metrology, Coordinate Measuring Machine and Machine Tool Performance, (LAMDAMAP 2017)

Traditional defect inspection for highly-parallel manufacturing processes requires the processing of large measurement datasets, which is often not fast enough for in-situ inspection of large areas with high resolution. This study develops an all-opt... Read More about Optical difference engine for defect inspection in highly-parallel manufacturing processes.

A metrology horror story: the additive surface (2017)
Presentation / Conference Contribution
Leach, R., Thompson, A., & Senin, N. A metrology horror story: the additive surface. Presented at ASPEN/ASPE 2017 Spring Topical Meeting on Manufacture and Metrology of Structured and Freeform Surfaces for Functional Applications

On tilt and curvature dependent errors and the calibration of coherence scanning interferometry (2017)
Journal Article
Su, R., Wang, Y., Coupland, J., & Leach, R. K. (in press). On tilt and curvature dependent errors and the calibration of coherence scanning interferometry. Optics Express, 25(4), https://doi.org/10.1364/OE.25.003297

Although coherence scanning interferometry (CSI) is capable of measuring surface topography with sub-nanometre precision, it is well known that the performance of measuring instruments depends strongly on the local tilt and curvature of the sample su... Read More about On tilt and curvature dependent errors and the calibration of coherence scanning interferometry.

Combined inkjet printing and infrared sintering of silver nanoparticles using a swathe-by-swathe and layer-by-layer approach for 3-dimensional structures (2017)
Journal Article
Vaithilingam, J., Simonelli, M., Saleh, E., Senin, N., Wildman, R. D., Hague, R. J. M., Leach, R. K., & Tuck, C. J. (2017). Combined inkjet printing and infrared sintering of silver nanoparticles using a swathe-by-swathe and layer-by-layer approach for 3-dimensional structures. ACS Applied Materials and Interfaces, 9(7), 6560-6570. https://doi.org/10.1021/acsami.6b14787

Despite the advancement of additive manufacturing (AM)/3-dimensional (3D) printing, single-step fabrication of multifunctional parts using AM is limited. With the view of enabling multifunctional AM (MFAM), in this study, sintering of metal nanoparti... Read More about Combined inkjet printing and infrared sintering of silver nanoparticles using a swathe-by-swathe and layer-by-layer approach for 3-dimensional structures.