Residual stresses and hardening near crack tip regions of austenitic steel

Ceretti, Monica; Hirschi, Karina; Marini, B.; Sprauel, Jean‐Michel; Lauriat, J.P.; Elkaı̈m, Erik

doi:10.1007/s003390201434

Cited by 3 publications

(1 citation statement)

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“…The whole Fourier analysis method has been applied to the characterization of the plastic deformation of a 316L austenitic stainless steel [10]. For that purpose, the two first orders of reflection of the {111}, {200} and {220} diffraction profiles were recorded using synchrotron radiation.…”

Section: Stress Evaluation Using Neutrons and Synchrotron Radiationmentioning

confidence: 99%

Monte Carlo Simulation to Macro Stress Evaluation and Micro Strain Analysis by Neutron and Synchrotron Radiation Diffraction

Sprauel

2008

MSF

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Neutron and synchrotron strain or stress evaluations are reliable when the probe volume is completely immersed in the studied material. However, acquisitions carried out close to interfaces are much more difficult to analyze. Under these conditions, it is indeed very difficult to characterize precisely the volume analyzed by the radiation and finally to define the measured depth. To solve this problem, a complete Monte Carlo simulation of neutron spectrometers and synchrotron experiments has been developed. This method allows defining precisely the size and shape of the probe used. It permits then predicting the evolution of the diffracted intensity versus the position of this volume in the matter. The calculations finally let to define the real analyzed depth, accounting for the local conditions of diffraction and absorption in the material. The method is illustrated by neutron and synchrotron experiments carried out to characterize stress fields existing close to interfaces. The simulations also permit predicting the shape of diffraction profiles that would be observed on perfect specimens. Such information can then be used to correct the instrumental broadening existing in real experiments. This allows a fine Fourier analysis of the diffraction peaks recorded for several orders of reflection and finally permits defining the mean size of the crystallites and the root mean squares of the strains of second and third kind. Such information is useful to characterize and analyze the mechanical behavior of materials.

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Section: Stress Evaluation Using Neutrons and Synchrotron Radiationmentioning

confidence: 99%

Monte Carlo Simulation to Macro Stress Evaluation and Micro Strain Analysis by Neutron and Synchrotron Radiation Diffraction

Sprauel

2008

MSF

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Numerical Evaluation and Experimental Comparison of Elasto-plastic Stress-strain Distribution Around the Corner Cracks of a Notched Specimen

Sepe

Armentani

Caputo

et al. 2015

Procedia Engineering

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This paper concerns the numerical simulations, by a commercial FEM code, related to notched specimens experimentally tested by neutron diffraction and synchrotron radiation diffraction, in order to correlate the deformation states around the crack tip. Two cracked specimens were analyzed. In one case a long crack has been induced into the specimen, which has been investigated subsequently by neutron diffraction technique. In the other case a smaller crack was induced, which has been investigated by synchrotron radiation diffraction technique. The numerical and experimental results are substantially in good agreement. However some differences can be observed; the reason can be found in the microscopic structure and particular history of the material under load

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Crack interaction with microstructure

Kumar

2007

Materials Today

144

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Residual stresses and hardening near crack tip regions of austenitic steel

Cited by 3 publications

References 0 publications

Monte Carlo Simulation to Macro Stress Evaluation and Micro Strain Analysis by Neutron and Synchrotron Radiation Diffraction

Monte Carlo Simulation to Macro Stress Evaluation and Micro Strain Analysis by Neutron and Synchrotron Radiation Diffraction

Numerical Evaluation and Experimental Comparison of Elasto-plastic Stress-strain Distribution Around the Corner Cracks of a Notched Specimen

Crack interaction with microstructure

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