Effect of machining processes on the residual stress distribution heterogeneities and their consequences on the stress corrosion cracking resistance of AISI 316L SS in chloride medium
| Autor: | Naziha Sidhom, Chedly Braham, Habib Sidhom, Amir Ben Rhouma, Kamel Makhlouf, Gonzalo Gonzalez |
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| Přispěvatelé: | Ecole Supérieure des Sciences et Techniques [Tunis] (ESSTT), Université de Carthage - University of Carthage, Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM)-Arts et Métiers Sciences et Technologies, HESAM Université (HESAM)-HESAM Université (HESAM), Instituto de Investigaciones en Materiales (Mexico, Mexico), Universidad Nacional Autónoma de México (UNAM) |
| Rok vydání: | 2019 |
| Předmět: |
Equiaxed crystals
0209 industrial biotechnology Matériaux [Sciences de l'ingénieur] Materials science Chloride medium - Crack network - Machining - Nanostructure - Residual stress - Stainless steel - Stress corrosion cracking threshold Scanning electron microscope Mechanical Engineering Abrasive 02 engineering and technology Industrial and Manufacturing Engineering [SPI.MAT]Engineering Sciences [physics]/Materials Computer Science Applications Grinding 020901 industrial engineering & automation Machining Control and Systems Engineering Residual stress Severe plastic deformation Composite material Stress corrosion cracking Software |
| Zdroj: | International Journal of Advanced Manufacturing Technology International Journal of Advanced Manufacturing Technology, Springer Verlag, 2019, 105, pp.1699-1711. ⟨10.1007/s00170-019-04410⟩ |
| ISSN: | 1433-3015 0268-3768 |
| DOI: | 10.1007/s00170-019-04410-w |
| Popis: | International audience; The effects of machining such as grinding and turning on the microstructural and mechanical changes of the machined surfaces of AISI 316L stainless steel (SS) have been studied. Surface aspects and surface defects have been examined by scanning electron microscopy (SEM). Machining-induced nanocrystallization has been investigated by transmission electron microscopy (TEM). Surface and subsurface residual stress distribution and plastic deformation induced by the machining processes have been assessed by X-ray diffraction (XRD) and micro-hardness measurements, respectively. The susceptibility to stress corrosion cracking (SCC) has been assessed by SEM examination of micro-crack networks which are characteristics of a machined surface immersed in boiling (140 ± 2 °C) solution of MgCl2 (40%) during a 48 h-period. The machined surface properties have been correlated to severe plastic deformation (SPD) resulting from specific cutting state of each process. High cutting temperature and plastic rate are considered to be at the origin of near-surface austenitic grain refinement that leads to equiaxed nanograins with a size ranging from 50 to 200 nm. Ground surface residual stress distribution heterogeneities at the micrometric scale are attributed to the random distribution of the density and the geometry of abrasive grains that represent micro-cutting tools in the grinding process. The relationship between residual stress distribution and susceptibility of the AISI 316L SS to SCC has been demonstrated, and an experimental criterion for crack initiation has been established. |
| Databáze: | OpenAIRE |
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