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Measurement of local creep properties in stainless steel welds

Sakanashi, Y.; Gungor, S. and Bouchard, J. (2012). Measurement of local creep properties in stainless steel welds. In: 4th International Conference on Integrity of High Temperature Welds, 25-27 Sep 2012, London.

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A high temperature measurement system for creep deformation based on the digital image correlation (DIC) technique is described. The new system is applied to study the behaviour of a multi-pass welded joint in a high temperature tensile test and a load controlled creep test at 545°C. Spatially resolved tensile properties and time dependent creep deformation properties across a thick section type 316 stainless steel multi-pass welded joint are presented and discussed. Significantly lower creep strain rates are observed in the HAZ than in the parent material which is attributed to the introduction of substantial plastic strain in the parent material on initial loading. The weld metal shows the fastest creep rates and a variation that appear to correlate with individual weld passes. The visual information provides not only the local creep strain distribution but also the reduction of area and true stress distribution based on strains measured in the transverse direction. The results demonstrate the capability of the DIC technique for full field measurement of displacement and strain at high temperature long term creep tests.

Item Type: Conference or Workshop Item
Copyright Holders: 2012 Not known
Project Funding Details:
Funded Project NameProject IDFunding Body
Not SetNot SetEDF Energy
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM)
Faculty of Science, Technology, Engineering and Mathematics (STEM) > Engineering and Innovation
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Item ID: 35732
Depositing User: Olivia Acquah
Date Deposited: 12 Dec 2012 15:04
Last Modified: 07 Dec 2018 15:37
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