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Measuring residual strain and stress in thermal spray coatings using neutron diffractometers. [Preprint]

Faisal, Nadimul Haque; Ahmed, Rehan; Prathuru, Anil K.; Paradowska, Anna; Lee, Tung Lik


Rehan Ahmed

Anna Paradowska

Tung Lik Lee


Background: During thermal spray coating, residual strain is formed within the coating and substrates due to thermo-mechanical processes and microstructural phase changes. Objective: This paper provides a comprehensive guide to researchers planning to use neutron diffraction technique for thermal spray coatings, and reviews some of these studies. Methods: ENGIN-X at the ISIS spallation source is a neutron diffractometer (time-of-flight) dedicated to materials science and engineering with high resolution testing. The focus is on the procedure of using ENGIN-X diffractometer for thermal spray coatings with a view that it can potentially be translated to other diffractometers. Results: Number of studies involving neutron diffraction analysis in thermal spray coatings remain limited, partly due to limited number of such strain measurement facilities globally, and partly due to difficulty is applying neutron diffraction analysis to measure residual strain in the thermal spray coating microstructure. Conclusions: This technique can provide a non-destructive through-thickness residual strain analysis in thermally sprayed components with a level of detail not normally achievable by other techniques. Neutron sources have been used to measure strains in thermal spray coatings, and here, we present examples where such coatings have been characterised at various neutron sources worldwide, to study residual strains and microstructures.


FAISAL, N.H., AHMED, R., PRATHURU, A.K., PARADOWSKA, A. and LEE, T.L. 2021. Measuring residual strain and stress in thermal spray coatings using neutron diffractometers. Research square [online], 12 April 2021, Preprint (version 1). Available from:

Deposit Date Nov 23, 2021
Publicly Available Date Nov 23, 2021
Keywords Residual strain; Residual stress; Neutron diffraction techniques; Thermal spray coatings; ENGIN-X; Neutron diffractometers
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Additional Information A version of this preprint was published at Experimental Mechanics on 10.11.2021. See the published version at


FAISAL 2021 Measuring residual (PREPRINT) (2.1 Mb)

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This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.

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