Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/34698
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Title

Superficial severe plastic deformation of 316 LVM stainless steel through grit blasting: Effects on its microstructure and subsurface mechanical properties

AuthorsMultigner, M. CSIC ORCID; Ferreira-Barragáns, Silvia; Frutos, E. CSIC; Jaafar, Miriam CSIC ORCID; Ibáñez, Joaquín CSIC; Marín, P.; Pérez Prado, María Teresa CSIC ORCID; González-Doncel, Gaspar; Asenjo, A.; González-Carrasco, José Luis CSIC ORCID CVN
KeywordsAustenitic steels
Grit blasting
Microstructure
Magnetic properties
Hardness
Residual stresses
Issue DateDec-2010
PublisherElsevier
CitationSurface & Coatings Technology 205 1830–1837
AbstractThe microstructure and mechanical properties of austenitic stainless steel 316 LVM (Low Vacuum Melting) blasted with either small and rounded ZrO2 particles or larger and angular shaped Al2O3 particles are analysed through magnetic force microscopy, synchrotron radiation diffraction and ultramicroindentation techniques. It is shown that blasting causes a severe plastic deformation that roughens the surface and produces a significant subsurface grain refinement and work hardening. The gradient in the plastic deformation and the volume increase associated with the deformation induced α′-martensite account for the development of compressive residual stresses with a maximum value close to the surface. All these features yield a gradient in hardness with a maximum value beneath the surface. Compared with the Al2O3 particles, the ZrO2 particles cause a higher value of compressive residual stress and a lower increase in hardness. Also, the Al2O3 particles lead to more α′-martensite formation at deeper regions from the surface than the ZrO2 particles. The different results are related with the specific morphology of the particles and their specific role in the blasting process.
Publisher version (URL)http://dx.doi.org/10.1016/j.surfcoat.2010.07.126
URIhttp://hdl.handle.net/10261/34698
DOI10.1016/j.surfcoat.2010.07.126
ISSN0257-8972
Appears in Collections:(CENIM) Artículos

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