Microstructural assessment of 316L stainless steel using infrared thermography based measurement of energy dissipation arising from cyclic loading
Microstructural assessment of 316L stainless steel using infrared thermography based measurement of energy dissipation arising from cyclic loading
A procedure is developed that evaluates the energy dissipated from a material subject to cyclic loading and enables identification of the difference in material microstructure. It is demonstrated that the dissipated energy can be derived from specimens loaded in the elastic region using temperature measurements obtained by infrared thermography. To obtain accurate values of the small temperature changes resulting from the intrinsic dissipation below the yield point, a key part of the procedure is to eliminate the effect of external heat sources and sinks from the vicinity of the test specimen under investigation. To this end, a chamber was designed to minimise the external radiation whilst allowing the specimens to be cyclically loaded; the configuration of the chamber is described, alongside its integration into the procedure. A reference specimen was specifically introduced in the chamber to take into account the thermal exchanges between the specimen and the chamber environment. A data processing procedure, based on the thermomechanical heat diffusion equation, is applied to enable the dissipated energy to be derived from the temperature measurements. It is established that quantifying the amount of energy dissipation provides an opportunity to identify the material condition. The procedure is demonstrated on specimens made from 316L stainless steel containing a range of microstructures produced by different heat treatments. It is shown that the dissipative energy is dependent on the microstructure and that the dissipative source can be identified using the experimental procedure.
316L Stainless Steel, Cyclic Loading, Energy Dissipation, Infrared Thermography Based Measurement, Microstructural Assessment
Jaya Seelan, Palaniappan
f5c6f247-d2f7-4533-893d-d9e88d83fbce
Dulieu-Barton, J.M.
865d08ff-9ec0-407c-bb31-0e34356b4809
Pierron, Fabrice
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
1 September 2020
Jaya Seelan, Palaniappan
f5c6f247-d2f7-4533-893d-d9e88d83fbce
Dulieu-Barton, J.M.
865d08ff-9ec0-407c-bb31-0e34356b4809
Pierron, Fabrice
a1fb4a70-6f34-4625-bc23-fcb6996b79b4
Jaya Seelan, Palaniappan, Dulieu-Barton, J.M. and Pierron, Fabrice
(2020)
Microstructural assessment of 316L stainless steel using infrared thermography based measurement of energy dissipation arising from cyclic loading.
Mechanics of Materials, 148, [103455].
(doi:10.1016/j.mechmat.2020.103455).
Abstract
A procedure is developed that evaluates the energy dissipated from a material subject to cyclic loading and enables identification of the difference in material microstructure. It is demonstrated that the dissipated energy can be derived from specimens loaded in the elastic region using temperature measurements obtained by infrared thermography. To obtain accurate values of the small temperature changes resulting from the intrinsic dissipation below the yield point, a key part of the procedure is to eliminate the effect of external heat sources and sinks from the vicinity of the test specimen under investigation. To this end, a chamber was designed to minimise the external radiation whilst allowing the specimens to be cyclically loaded; the configuration of the chamber is described, alongside its integration into the procedure. A reference specimen was specifically introduced in the chamber to take into account the thermal exchanges between the specimen and the chamber environment. A data processing procedure, based on the thermomechanical heat diffusion equation, is applied to enable the dissipated energy to be derived from the temperature measurements. It is established that quantifying the amount of energy dissipation provides an opportunity to identify the material condition. The procedure is demonstrated on specimens made from 316L stainless steel containing a range of microstructures produced by different heat treatments. It is shown that the dissipative energy is dependent on the microstructure and that the dissipative source can be identified using the experimental procedure.
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More information
Accepted/In Press date: 29 April 2020
Published date: 1 September 2020
Additional Information:
Funding Information:
The work described in the paper was part of an Innovate UK sponsored collaborative project under the ?Developing the civil nuclear power supply chain? call, number 101438, Residual Stress and Structural Integrity Studies using Thermography (RESIST). Project partners include Enabling Process Technologies Ltd, University of Southampton, National Physical Laboratory, TWI, EDF Energy and Wood Plc. The experimental work described in the paper was conducted in the Testing and Structures Research Laboratory (TSRL) at the University of Southampton https://www.southampton.ac.uk/engineering/research/facilities/360/tsrl_360.page. The authors acknowledge the support received from Dr Andy Robinson, the TSRL Principal Experimental Officer.
Publisher Copyright:
© 2020 Elsevier Ltd
Keywords:
316L Stainless Steel, Cyclic Loading, Energy Dissipation, Infrared Thermography Based Measurement, Microstructural Assessment
Identifiers
Local EPrints ID: 439788
URI: http://eprints.soton.ac.uk/id/eprint/439788
ISSN: 0167-6636
PURE UUID: 3b3565b2-f1ee-4ee1-a600-5023cc8b8e90
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Date deposited: 04 May 2020 16:31
Last modified: 17 Mar 2024 03:20
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Author:
Palaniappan Jaya Seelan
Author:
J.M. Dulieu-Barton
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