Deformation mechanisms induced under high cycle fatigue tests in a metastable austenitic stainless steel
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Tipus de documentArticle
Data publicació2014
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Abstract
Advanced techniques were used to study the deformation mechanisms induced by fatigue tests in a metastable austenitic stainless steel AISI 301LN. Observations by Atomic Force Microscopy were carried out to study the evolution of a pre-existing martensite platelet at increasing number of cycles. The sub-superficial deformation mechanisms of the austenitic grains were studied considering the cross-section microstructure obtained by Focused Ion Beam and analysed by Scanning Electron Microscopy and Transmission Electron Microscopy. The results revealed no deformation surrounding the pre-existing martensitic platelet during fatigue tests, only the growth on height was observed. Martensite formation was associated with shear bands on austenite, mainly in the {111} plane, and with the activation of the other intersecting austenite {111}〈110〉 slip system. Furthermore, transmission electron microscopy results showed that the nucleation of ε-martensite follows a two stages phase transformation (γfcc→εhcp→α'bcc).
CitacióRoa, J. [et al.]. Deformation mechanisms induced under high cycle fatigue tests in a metastable austenitic stainless steel. "Materials science and engineering A. Structural materials properties microstructure and processing", 2014, vol. 597, p. 232-236.
ISSN0921-5093
Versió de l'editorhttp://www.sciencedirect.com/science/article/pii/S0921509313014184#
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2014_MaterialsScience&EngineeringA.pdf | Paper | 2,309Mb | Accés restringit |