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Investigating plastic deformation around a reheat-crack in a 316H austenitic stainless steel weldment by misorientation mapping

Unnikrishnan, Rahul; Northover, Shirley; Jazaeri, Hedieh and Bouchard, P. John (2016). Investigating plastic deformation around a reheat-crack in a 316H austenitic stainless steel weldment by misorientation mapping. In: Procedia Structural Integrity, Elsevier, 2 pp. 3501–3507.

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URL: http://www.sciencedirect.com/science/article/pii/S...
DOI (Digital Object Identifier) Link: https://doi.org/10.1016/j.prostr.2016.06.436
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Abstract

Creep degradation in austenitic stainless steels is associated with nucleation and growth of cavities that can link up to form micro- and macro- cracks, usually along grain boundaries. A reheat crack found near a header nozzle weld removed from a nuclear power station has been examined using both electron backscatter diffraction (EBSD) and hardness mapping. The EBSD studies revealed higher levels of lattice misorientation towards the weld region where the crack initiated with strain particularly concentrated at grain boundaries. The pattern of deformation shown by the EBSD measurements was confirmed by the hardness survey.

Item Type: Conference or Workshop Item
Copyright Holders: 2016 PROSTR (Procedia Structural Integrity)
ISSN: 2452-3216
Keywords: Reheat crack; 316H; Austenitic stainless steel; EBSD; Creep cavity
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
Faculty of Science, Technology, Engineering and Mathematics (STEM)
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Item ID: 46964
Depositing User: Rahul Unnikrishnan
Date Deposited: 05 Aug 2016 14:52
Last Modified: 01 Dec 2016 03:33
URI: http://oro.open.ac.uk/id/eprint/46964
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