Stress distribution correlated with damage in duplex stainless steel studied by synchrotron diffraction during plastic necking
TypeArticles dans des revues avec comité de lecture
The goal of this work was the determination of lattice strains distribution in two phases of duplex steel during plastic necking. Subsequently, the stress heterogeneity in the neck was studied in order to determine the reason for the damage initiation and to verify the hypothesis that the damage begins in the ferritic phase. To do this, X-ray synchrotron radiation was used to scan the ‘in situ’ variation of the interplanar spacings along the necking zone for samples subjected to tensile loading. A self-consistent model and FEM simulation were applied for the experimental data interpretation. It was found that for advanced necking the phase lattice strains, especially those measured at some distance from the neck centre, show a large inversion of the loads localised in both phases compared to the undamaged state (the lattice strains in the ferrite become smaller than in the austenite). This effect indicates stress relaxation in the ferrite which is connected with the damage phenomenon. Correlation of the experimental results with the modelling shows that the value of von Mises stress is responsible for the initiation of the ferritic phase softening.
Showing items related by title, author, creator and subject.
Stress measurements by multi-reflection grazing-incidence X-ray diffraction method (MGIXD) using different radiation wavelengths and different incident angles MARCISZKO, Marianna; BACZMANSKI, Andrzej; BRAHAM, Chedly; WRÓBEL, Mirosław; WROŃSKI, Sebastian; CIOS, Grzegorz (Elsevier, 2017)The presented study introduces the development of the multi-reflection grazing-incidence X-ray diffraction method (MGIXD) for residual stress determination. The proposed new methodology is aimed at obtaining more reliable ...
Problem of elastic anisotropy and stacking faults in stress analysis using multireflection grazing-incidence X-ray diffraction MARCISZKO, Marianna; BACZMANSKI, Andrzej; MIROSŁAW, Wrobel; SEILER, Wilfrid; BRAHAM, Chedly; WRONSKI, Sebastian; WAWSZCZAK, Roman (International Union of Crystallography, 2015)Multireflection grazing-incidence X-ray diffraction (MGIXD) was used to determine the stress- and strain-free lattice parameter in the surface layer of mechanically treated (polished and ground) tungsten and austenitic ...
A multireflection and multiwavelength residual stress determination method using energy dispersive diffraction MARCISZKO, Marianna; WAWSZCZAK, Roman; SIDHOM, Habib; BRAHAM, Chedly; WROBEL, Mirosław; WRONSKI, Sebastian; OPONOWICZ, Adrian; GENZEL, Christoph; KLAUS, Manuela; BACZMANSKI, Andrzej (Wiley-Blackwell, 2018)The main focus of the presented work was the investigation of structure and residual stress gradients in the near-surface region of materials studied by X-ray diffraction. The multireflection method was used to measure ...
Effect of interlamellar spacing on the elastoplastic behavior of C70 pearlitic steel: Experimental results and self-consistent modeling YAHYAOUI, Houda; SIDHOM, H; BRAHAM, Chedly; BACZMANSKI, Andrzej (ELSEVIER, 2014)The effect of pearlite microstructure characteristics on strength and deformation of C70 pearlitic steel was investigated. Tensile tests under X-ray diffraction coupled with self-consistent model have been used to identify ...
Application of multireﬂection grazing incidence method for stress measurements in polished Al–Mg alloy and CrN coating MARCISZKO, Marianna; BACZMANSKI, Andrzej; WIERZBANOWSKI, K; WRÓBEL, M; BRAHAM, Chedly; CHOPART, J.-P.; LODINI, A; BONARSKI, J; TARKOWSKI, L.; ZAZI, N (Elsevier, 2012)Multi-reﬂection grazing incidence geometry, referred to as MGIXD, characterized by a small and constant incidence angle, was applied to measure low surface stresses in very thin layers of Al–Mg alloy and CrN coating. These ...