Inhomogeneity of plastic deformation in austenitic stainless steel after surface mechanical attrition treatment

Bajda, Szymon and Ratuszek, Wiktoria and Krzyzanowski, Michal and Retraint, Delphine (2017) Inhomogeneity of plastic deformation in austenitic stainless steel after surface mechanical attrition treatment. Surface & Coatings Technology, 329. pp. 202-211. ISSN 0257-8972

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Abstract

Inhomogeneity of microstructure evolution in cold-rolled austenitic stainless steel after surface mechanical attrition treatment (SMAT) was investigated. A characteristic deformation pattern was obtained for all studied specimens. Selected areas were examined through X-ray diffraction (XRD) and scanning electron microscopy (SEM). Estimation of the α′-martensite volume fraction below the treated surfaces showed, that some of the studied areas are characterised by significant different amount of this phase (from 10 to 22% - BB, from 19 to 31% - GIXD). The performed finite element (FE) numerical analysis showed, that the reason for this may be the presence of an air gap between the impacted material and fixation and also relatively short high stress time duration due to surface inclination during the surface treatment. Annealing at 550 and 650 °C greatly increased the volume fraction of α′-martensite (up to 47% - BB) and formed Fe2O3 as well as Fe3O4, whereas annealing at 700 °C resulted in both disappearance of α′-martensite and in reduction of oxides.

Item Type: Article
Uncontrolled Keywords: SMAT Austenitic stainless steel Strain-induced martensite Non-uniform deformation Annealing Nanocrystalline structure
Subjects: H100 General Engineering
Divisions: Faculty of Computing, Engineering and the Built Environment
Faculty of Computing, Engineering and the Built Environment > School of Computing and Digital Technology
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment > Advanced Design Engineering
Faculty of Computing, Engineering and the Built Environment > School of Engineering and the Built Environment > Advanced Systems Engineering
UoA Collections > UoA15: General Engineering
Depositing User: $ Ian McDonald
Date Deposited: 16 Oct 2017 09:39
Last Modified: 15 Nov 2017 14:28
URI: http://www.open-access.bcu.ac.uk/id/eprint/5221

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