Microsecond time-resolved X-ray diffraction for the investigation of fatigue behavior during ultrasonic fatigue loading
TypeArticles dans des revues avec comité de lecture
A new method based on time-resolved X-ray diffraction is proposed in order to measure the elastic strain and stress during ultrasonic fatigue loading experiments. Pure Cu was chosen as an example material for the experiments using a 20 kHz ultrasonic fatigue machine mounted on the six-circle diffractometer available at the DiffAbs beamline on the SOLEIL synchrotron facility in France. A two-dimensional hybrid pixel X-ray detector (XPAD3.2) was triggered by the strain gage signal in a synchronous data acquisition scheme (pump–probe-like). The method enables studying loading cycles with a period of 50 µs, achieving a temporal resolution of 1 µs. This allows a precise reconstruction of the diffraction patterns during the loading cycles. From the diffraction patterns, the position of the peaks, their shifts and their respective broadening can be deduced. The diffraction peak shift allows the elastic lattice strain to be estimated with a resolution of ∼10−5. Stress is calculated by the self-consistent scale-transition model through which the elastic response of the material is estimated. The amplitudes of the cyclic stresses range from 40 to 120 MPa and vary linearly with respect to the displacement applied by the ultrasonic machine. Moreover, the experimental results highlight an increase of the diffraction peak broadening with the number of applied cycles.
Cette publication figure dans le(s) laboratoire(s) suivant(s)
Visualiser des documents liés par titre, auteur, créateur et sujet.
Microsecond time-resolved x-ray diffraction for the investigation of fatigue behavior during ultrasonic fatigue loading ÖRS, Taylan; RANC, Nicolas; PELERIN, Maxime; MICHEL, Vincent; FAVIER, Véronique; CASTELNAU, Olivier; MOCUTA, Christian; THIAUDIERE, D (International Union of Crystallography, 2019)A new method based on time-resolved X-ray diffraction is proposed in order to measure the elastic strain and stress during ultrasonic fatigue loading experiments. Pure Cu was chosen as an example material for the experiments ...
Neutron diffraction measurements of residual stress distribution in large zirconia based refractory bricks produced by electro-fusion and casting ÖRS, Taylan; GOURAUD, Fanny; GUINEBRETIERE, René; HUGER, Marc; MICHEL, Vincent; CASTELNAU, Olivier (Elsevier, 2017)Electro-fusion and casting is used to produce large refractory bricks (∼250 kg) containing a high amount of ZrO2. These bricks are used in glass-making furnaces where good mechanical performance is required at very high ...
ÖRS, Taylan; MICHA, Jean-Sébastien; GEY, Nathalie; MICHEL, Vincent; CASTELNAU, Olivier; GUINEBRETIERE, René (Wiley-Blackwell, 2018)The X-ray Laue microdiffraction (mLaue) technique has been establishing itself as a reliable means for microstrain analysis for the past few decades. One problem with this technique is that when the crystal size is ...
PHUNG, Ngoc-Lam; MARTI, Nicolas; BLANCHE, Antoine; RANC, Nicolas; FAVIER, Véronique; CHRYSOCHOOS, André; SAINTIER, Nicolas; GREGORI, Fabienne; BACROIX, Brigitte; THOQUENNE, Guillaume (Elsevier, 2013)The DISFAT project is a French project financially supported by the French National Agency for Research (ANR). It aims at a deeper understanding of mechanisms leading to crack initiation in metals and alloys under Very ...
On the Accuracy of Elastic Strain Field Measurements by Laue Microdiffraction and High-Resolution EBSD: a Cross-Validation Experiment PLANCHER, Emeric; PETIT, Johann; MAURICE, Claire; FAVIER, Véronique; SAINTOYANT, Lucie; LOISNARD, Dominique; RUPIN, N.; MARIJON, Jean Baptiste; ULRICH, Olivier; BORNERT, Michel; MICHA, Jean Sébastien; ROBACH, Odile; CASTELNAU, Olivier (Springer New York LLC, 2016)Determining the accuracy of elastic strain measurements in plastically deformed alloys is an experimental challenge. To develop a novel cross-validation procedure, a controlled elasto-plastic strain gradient was created ...