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All Outputs (22)

Development of mathematically-defined surfaces (2017)
Conference Proceeding
Todhunter, L. D., Leach, R., Lawes, S., Harris, P., & Blateyron, F. (2017). Development of mathematically-defined surfaces.

New software has been developed that enables the creation of areal surface topography representations. The goal of this software package is to utilise the mathematically-defined surface representations in the development of surface texture parameter... Read More about Development of mathematically-defined surfaces.

True-color 3D surface metrology for additive manufacturing using interference microscopy (2017)
Conference Proceeding
DiSciacca, J., Gomez, C., Thompson, A., Lawes, S., Leach, R., Colonna de Lega, X., & de Groot, P. (2017). True-color 3D surface metrology for additive manufacturing using interference microscopy.

Coherence scanning interferometry (CSI) is widely used for surface topography characterisation. With the ability to measure both rough surfaces with the high slopes and optical finishes, CSI has made contibutions in fields from industrial machining t... Read More about True-color 3D surface metrology for additive manufacturing using interference microscopy.

Optimisation of surface topography characterisation for metal additive manufacturing using coherence scanning interferometry (2017)
Conference Proceeding
Gómez, C. A., Su, R., Thompson, A., DiSciacca, J., Lawes, S., & Leach, R. K. (2017). Optimisation of surface topography characterisation for metal additive manufacturing using coherence scanning interferometry.

The surface topography of metal additive manufactured (AM) parts can be challenging to measure due to the presence of complex features, such as high slopes, step like recesses and protuberances, and local variations in reflectance. Recent innovations... Read More about Optimisation of surface topography characterisation for metal additive manufacturing using coherence scanning interferometry.

Feature-based characterisation of laser powder bed fusion surfaces (2017)
Conference Proceeding
Senin, N., Thompson, A., & Leach, R. K. (2017). Feature-based characterisation of laser powder bed fusion surfaces.

A novel algorithmic pipeline for the automated identification and dimensional/geometric characterisation of topographic formations of interest (surface features) is proposed, specifically aimed at the investigation of signature features left by laser... Read More about Feature-based characterisation of laser powder bed fusion surfaces.

Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing (2017)
Conference Proceeding
Xu, Z., Hyde, C. J., Thompson, A., Leach, R. K., Maskery, I., Tuck, C., & Clare, A. T. (2017). Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing.

The mechanical performance of additively manufactured (AM) components remains an issue, limiting the implementation of AM technologies. In this work, a new method is presented, to examine the evolution of defects in an Inconel 718 two-bar test specim... Read More about Defect evolution in laser powder bed fusion additive manufactured components during thermo-mechanical testing.

The application of composite through-thickness assessment to additively manufactured structures (2017)
Conference Proceeding
Bitar, I., Aboulkhair, N., & Leach, R. (2017). The application of composite through-thickness assessment to additively manufactured structures. In Solid Freeform Fabrication 2017: Proceedings of the 28th Annual International Solid Freeform Fabrication Symposium – An Additive Manufacturing Conference (616-632)

This study looks into the applicability of through-thickness assessment to additive manufacturing (AM) carbon-fibre reinforced polymers (CFRPs). The study utilised a material extrusion printer that uses fused filament fabrication and composite filame... Read More about The application of composite through-thickness assessment to additively manufactured structures.

Results of an industrial survey on the use of surface texture parameters (2017)
Conference Proceeding
Todhunter, L. D., Leach, R., & Lawes, S. (2017). Results of an industrial survey on the use of surface texture parameters.

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)
Conference Proceeding
Syam, W. P., Jianwei, W., Zhao, B., Maskery, I., & Leach, R. K. (2017). Design of mechanically-optimised lattice structures for vibration isolation.

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)
Conference Proceeding
Alburayt, A., Syam, W. P., & Leach, R. (2017). Detecting the signature of motion stage non-linearity for focus variation microscopy using measurement noise and surface topography repeatability.

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.

An industrial survey on the use of surface texture parameters (2017)
Conference Proceeding
Todhunter, L. D., Leach, R., & Lawes, S. D. (2017). An industrial survey on the use of surface texture parameters.

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.

X-ray computed tomography of additively manufactured metal parts: the effect of magnification and reconstruction sampling on surface topography measurement (2017)
Conference Proceeding
Thompson, A., Körner, L., Senin, N., Lawes, S., Leach, R., & Maskery, I. (2017). X-ray computed tomography of additively manufactured metal parts: the effect of magnification and reconstruction sampling on surface topography measurement.

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.

Focus variation measurement of electron beam melted surfaces (2017)
Conference Proceeding
Newton, L., Senin, N., & Leach, R. (2017). Focus variation measurement of electron beam melted 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.

Coherence scanning interferometry for additive manufacture (2017)
Conference Proceeding
Gomez, C., Thompson, A., DiSciacca, J., Lawes, S., & Leach, R. (2017). Coherence scanning interferometry for additive manufacture.

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.

Measurement noise of a point autofocus surface topography instrument (2017)
Conference Proceeding
Feng, X., Quagliotti, D., Maculotti, G., Syam, W. P., Tosello, G., Hansen, H. N., …Leach, R. (2017). Measurement noise of a point autofocus surface topography instrument.

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.

Tolerance on sphere radius for the calibration of the transfer function of coherence scanning interferometry (2017)
Conference Proceeding
Su, R., Coupland, J. M., Wang, Y., & Leach, R. K. (2017). Tolerance on sphere radius for the calibration of the transfer function of coherence scanning interferometry. In P. Lehmann, W. Osten, & A. Albertazzi Gonçalves (Eds.), Proceedings Volume 10329 Optical Measurement Systems for Industrial Inspection X. https://doi.org/10.1117/12.2272041

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.