The mechanical behaviour of 316L stainless steel single crystal is characterised at room temperature and 300 °C. Elasticity moduli are obtained with resonant ultrasound spectroscopy. Their dependence on calibrated molecular dynamics simulations. plastic by tensile tests millimetre-sized specimens compression micrometre-sized specimens. A constitutive model plasticity based dislocation density hardening finite strains developed implemented in an open-source material subroutine compatible...

Accurate defect characterization is desirable in the ultrasonic nondestructive evaluation as it can provide quantitative information about type and geometry. For using arrays, high-resolution images size if a relatively large. However, performance of image-based becomes poor for small defects that are comparable to wavelength. An alternative approach extract far-field scattering coefficient matrix from array data use characterization. Defect be performed based on database consists matrices...

The objective of the present work is to investigate potential Resonant Ultrasound Spectroscopy (RUS) as an innovative technique for nondestructive analysis Laser Powder Bed Fusion (LPBF) AlSi7Mg0.6 parts. acoustic resonance measurements are tested against experimental database that covers a broad range process parameters and large variations standard volumetric energy density. Two other techniques used assess RUS additively manufactured samples: easy-to-use Archimedes density measurement...

This paper describes the development of an in-house phased array EMAT transducer for longitudinal wave inspection in liquid sodium. The work presented herein is part undergoing project aimed at improving in-service techniques ASTRID reactor project. design process probe briefly explained and followed by a review experimental test results. We first present results obtained laboratory while last sodium testing produced ultrasound images.

A long-standing problem for Sodium cooled Fast Reactor (SFR) instrumentation is the development of efficient under-sodium visualization systems adapted to hot and opaque sodium environment. Electromagnetic Acoustic Transducers (EMAT) are potential candidates a new generation Ultrasonic Testing (UT) probes well-suited SFR inspection that can overcome drawbacks classical piezoelectric in Based on use CIVA simulation tools, we have designed optimized an advanced EMAT probe visualization. This...

In-service inspection of sodium fast reactors requires the development non-destructive techniques adapted to hot and opaque environment complex accessibility reactor pressure vessel. As French Atomic Energy Commission is leading Advanced Sodium Test Reactor for Industrial Demonstration (ASTRID) [1], ultrasound approaches are currently investigated deal with this task. Tight collaboration CIVA software team has established as primary design tool simulate possible methods predict their...

Models for the simulation of ultrasonic inspections flat and curved plate-like composite structures, as well stiffeners, are available in CIVA-COMPOSITE module released 2016. A first modelling approach using a ray-based model is able to predict propagation an anisotropic effective medium obtained after having homogenized laminate. Fast 3D computations can be performed on configurations featuring delaminations, bottom holes or inclusions example. In addition, ply waviness this will CIVA 2017....

Sodium cooled Fast Reactors (SFR) use liquid sodium as a coolant. Liquid being opaque, optical techniques cannot be applied to reactor vessel inspection. This makes it necessary develop alternative ways of assessing the state structures immersed in medium. Ultrasonic pressure waves are well suited for inspection tasks this environment, especially using pulsed electromagnetic acoustic transducers (EMAT) that generate ultrasound directly sodium. The work carried out at CEA LIST is aimed...

Ultrasonic guided wave techniques are seen as suitable candidates for the inspection of welded structures within sodium cooled fast reactors (SFR), long range propagation waves without amplitude attenuation can overcome accessibility problem due to liquid sodium. In context development Advanced Sodium Test Reactor Industrial Demonstration (ASTRID), French Atomic Commission (CEA) investigates non-destructive testing based on propagation. this work, NDT methods applied control integrity welds...

Under sodium viewing at high temperatures is an important requirement in cooled fast reactors (SFR) for navigation during structural inspection. USV also needed to locate and identify loose parts under sodium, when required. Conventionally, ultrasonic imaging done using XY raster scanning method. However, due space constraints within the reactor, it may pose limitations. As alternative, θ-Z can be used. Ultrasonic image of a typical tool, namely pliers, obtained both scan approaches....

In recent years, Resonant Ultrasound Spectroscopy (RUS) has been extensively applied to objects produced by additive manufacturing characterize elastic material properties, detect defects or geometrical deviations. this talk, we analyze samples that were using the wire-arc (WAAM) process different grades of steel wires. Resonance spectra obtained and allowed classify as either elastically isotropic anisotropic. Detailed investigation on anisotropic (produced with 316L wire) under an...

Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation V. Baronian, K. Jezzine, F. Le Bourdais; Hybrid modal/FE simulation of guided waves inspections. AIP Conference Proceedings 25 January 2013; 1511 (1): 191–198. https://doi.org/10.1063/1.4789048 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex...

Grade2XL is a European project funded by the H2020 program that gathers 21 academic and industrial partners. Started in March 2020 for 4 years, principal objective to print extra-large structures using WAAM (Wire Arc Additive Manufacturing) method with complete control of fabrication process. Since relatively new technology printing large specimens, it important develop quality assurance methods can be used during once structure has been built, which focus CEA List project. Regarding applied...

The present paper describes a proof of concept showing the ability ultrasound time flight measurements to complement existing temperature in laser powder bed fusion additive manufacturing process. To this end, two printers (a 3D Systems ProX DMP 320 and Farsoon FS 271M) were instrumented with ultrasonic transducers, as well thermal cameras thermocouples. obtained results show that signals can provide information is both consistent complementary data from standard camera thermocouple systems....

In this work, we assess the inversion performance in terms of crack characterization and localization based on synthetic signals associated to ultrasonic eddy current physics. More precisely, two different standard iterative algorithms are used minimize discrepancy between measurements (i.e., tested data) simulations. Furthermore, order speed up computational time get rid burden often algorithms, replace forward solver by a suitable metamodel fit database built offline. second step, adding...

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Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation Florian Le Bourdais, Benoı̂t Marchand, Vahan Baronian; Development application of modeling tools for sodium fast reactor inspection. AIP Conf. Proc. 18 February 2014; 1581 (1): 1014–1021. https://doi.org/10.1063/1.4864932 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers...