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In situ observation of intergranular crack nucleation in a grain boundary controlled austenitic stainless steel

Rahimi, Salaheddin and Engelberg, Dirk and Duff, Jonathan and Marrow, James (2009) In situ observation of intergranular crack nucleation in a grain boundary controlled austenitic stainless steel. Journal of Microscopy, 233 (3). pp. 423-431. ISSN 0022-2720

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Abstract

Grain boundary engineering has been proposed to increase the lifetime performance of sensitized austenitic stainless steel in aggressive environments. Increased microstructure resistance is typically associated with higher fractions of twin (Sigma 3) grain boundaries, but there is uncertainty about the properties and role of other boundaries. To develop predictive models for stress corrosion crack nucleation, more information is required about how grain boundary crystallography and the orientations of the grain boundary plane and its surrounding grains affect crack development. Digital image correlation combined with electron backscatter diffraction has been used to characterize the microstructure and to observe, in situ, the nucleation and propagation of short stress corrosion cracks in thermo-mechanically processed type 304 stainless steel. The crack path and its growth rate have been determined and are found to be influenced by the microstructure.

Item type: Article
ID code: 39976
Keywords: crack growth, digital image correlation (DIC), grain boundary engineering (GBE), in situ observation, intergranular stress corrosion (IGSCC), stainless steel, Engineering design, Pathology and Forensic Medicine, Histology
Subjects: Technology > Engineering (General). Civil engineering (General) > Engineering design
Department: Faculty of Engineering > Design, Manufacture and Engineering Management
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Depositing user: Pure Administrator
Date Deposited: 11 Jun 2012 11:44
Last modified: 05 Sep 2014 16:18
URI: http://strathprints.strath.ac.uk/id/eprint/39976

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