Tong, V; Mingard, K (2025) Interlaboratory comparison of EBSD grain size distribution analysis methods on an additively manufactured Ni alloy. NPL Report. MAT 130

Preview

Text (NPL Report MAT 130) MAT130.pdf - Published Version Download (17MB) | Preview

Abstract

This interlaboratory comparison study aimed to determine the current conventions and good practice for measuring, reporting, and visualising the grain size distribution in an additively manufactured nickel alloy microstructure measured using EBSD. Currently there is no suitable standard for EBSD-based grain size measurement of additively manufactured material microstructures, which typically have spatially heterogeneous, broad grain size distributions and anisotropic, non-convex grain shapes. Feret diameters and area-weighted average metrics were more suitable for describing the microstructure. Detailed reporting of the data processing method and grain size metric(s) chosen is crucial because measured value is very sensitive to the grain size metric and data processing methods, both of which are chosen by the operator.

Item Type:	Report/Guide (NPL Report)
NPL Report No.:	MAT 130
Subjects:	Advanced Materials > Microstructural Characterisation
Divisions:	Materials and Mechanical Metrology
Identification number/DOI:	10.47120/npl.MAT130
Last Modified:	28 Jan 2025 10:18
URI:	https://eprintspublications.npl.co.uk/id/eprint/10112