Plastic Heterogeneities Characterisation in 16MND5 RPV Steel by X-Ray Diffraction, Comparison with Finite-Element Approach

2006 ◽  
Vol 524-525 ◽  
pp. 523-528 ◽  
Author(s):  
Jean Philippe Mathieu ◽  
Denis Bouscaud ◽  
Karim Inal ◽  
Sophie Berveiller ◽  
Olivier Diard
Keyword(s):  
Tensile Testing ◽  
Bainitic Steel ◽  
X Ray Diffraction ◽  
Finite Element Approach ◽  
X Ray ◽  
Rpv Steel ◽  
Element Approach ◽  
Simulation Results ◽  
Experimental Characterisation

This paper reports experimental characterisation of stress heterogeneities in a French RPV bainitic steel (16MND5) determined by X-Ray diffraction during in-situ tensile testing at low temperature (until –150°C). Results are compared successfully to simulation results, obtained by post-processing of Finite Elements computations of realistic 3D aggregates.

scholarly journals In-Situ Characterization by High-Energy X-ray Diffraction of the Phase Transformations Leading to Transformation-Induced Plasticity-Aided Bainitic Steel

2019 ◽  
Vol 3 (4) ◽  
pp. 25
Author(s):  
Zélie Tournoud ◽  
Frédéric De Geuser ◽  
Gilles Renou ◽  
Didier Huin ◽  
Patricia Donnadieu ◽  
...  
Keyword(s):  
Carbon Content ◽  
Phase Transformations ◽  
High Energy ◽  
Heat Treatments ◽  
Treatment Temperature ◽  
Bainitic Steel ◽  
X Ray Diffraction ◽  
Transformation Induced Plasticity ◽  
X Ray

The phase transformations occurring during the heat treatments leading to transformation-induced plasticity (TRIP)-aided bainitic steel have been investigated in-situ by high-energy X-ray diffraction (HEXRD) conducted with synchrotron light at 90 keV. Direct microstructure characterization has been performed by electron microscopy using electron backscatter diffraction and orientation and phase mapping in a transmission electron microscope. HEXRD data allow the quantification of the evolution of the austenite phase fraction with the heat treatments, as well as its carbon content and the fraction of carbides, from the lattice parameter evolution. It is shown that different combinations of austenite fraction and carbon content can be reached by adjusting the heat treatment temperature.

Structural changes during tensile testing of an all-cellulose composite by in situ synchrotron X-ray diffraction

2006 ◽  
Vol 66 (15) ◽  
pp. 2639-2647 ◽  
Author(s):  
Wolfgang Gindl ◽  
Klaus J. Martinschitz ◽  
Peter Boesecke ◽  
Jozef Keckes
Keyword(s):  
Tensile Testing ◽  
Structural Changes ◽  
X Ray Diffraction ◽  
X Ray ◽  
Cellulose Composite

Measuring thin film and multilayer elastic constants by coupling in situ tensile testing with x-ray diffraction

2002 ◽  
Vol 80 (25) ◽  
pp. 4705-4707 ◽  
Author(s):  
K. F. Badawi ◽  
P. Villain ◽  
Ph. Goudeau ◽  
P.-O. Renault
Keyword(s):  
Thin Film ◽  
Elastic Constants ◽  
Tensile Testing ◽  
X Ray Diffraction ◽  
X Ray ◽  
In Situ Tensile Testing

In Situ Observations of Stresses in Al Interconnect Line by Synchrotron Radiation under Thermal/Electrical Conditions

2014 ◽  
Vol 905 ◽  
pp. 88-91
Author(s):  
Hou Kui Fu ◽  
De Bo Lu ◽  
Zi Guo Li
Keyword(s):  
Synchrotron Radiation ◽  
Current Density ◽  
In Situ Observation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Self Heating ◽  
Induced Stress ◽  
Current Densities ◽  
Simulation Results

In-situ observation of stress in Al interconnects under electromigration and thermal effect by using the synchrotron radiation x-ray diffraction. The test temperature was controlled by changing the current density of W (self-heating structure). The EM-induced stress was also investigated with current densities from 3x105A/cm2 to 4x106A/cm2.The conclusion agreed well with the simulation results.

Effect of Thermomechanical Processing on the Microstructure and Retained Austenite Stability during In Situ Tensile Testing Using Synchrotron X-Ray Diffraction of NbMoAl TRIP Steel

2011 ◽  
Vol 172-174 ◽  
pp. 741-746 ◽  
Author(s):  
Elena V. Pereloma ◽  
Lai Chang Zhang ◽  
Klaus Dieter Liss ◽  
Ulf Garbe ◽  
Jonathan Almer ◽  
...  
Keyword(s):  
Tensile Testing ◽  
Retained Austenite ◽  
Thermomechanical Processing ◽  
Critical Role ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
The Stability

In this work we compare and contrast the stability of retained austenite during tensile testing of Nb-Mo-Al transformation-induced plasticity steel subjected to different thermomechanical processing schedules. The obtained microstructures were characterised using optical metallography, transmission electron microscopy and X-ray diffraction. The transformation of retained austenite to martensite under tensile loading was observed by in-situ high energy X-ray diffraction at 1ID / APS. It has been shown that the variations in the microstructure of the steel, such as volume fractions of present phases, their morphology and dimensions, play a critical role in the strain-induced transition of retained austenite to martensite.

scholarly journals Interfibrillar stiffening of echinoderm mutable collagenous tissue demonstrated at the nanoscale

2016 ◽  
Vol 113 (42) ◽  
pp. E6362-E6371 ◽  
Author(s):  
Jingyi Mo ◽  
Sylvain F. Prévost ◽  
Liisa M. Blowes ◽  
Michaela Egertová ◽  
Nicholas J. Terrill ◽  
...  
Keyword(s):  
Tensile Testing ◽  
Sea Cucumber ◽  
Neural Control ◽  
Fibrillar Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Collagenous Tissue ◽  
Chemically Induced ◽  
Collagenous Tissues

The mutable collagenous tissue (MCT) of echinoderms (e.g., sea cucumbers and starfish) is a remarkable example of a biological material that has the unique attribute, among collagenous tissues, of being able to rapidly change its stiffness and extensibility under neural control. However, the mechanisms of MCT have not been characterized at the nanoscale. Using synchrotron small-angle X-ray diffraction to probe time-dependent changes in fibrillar structure during in situ tensile testing of sea cucumber dermis, we investigate the ultrastructural mechanics of MCT by measuring fibril strain at different chemically induced mechanical states. By measuring a variable interfibrillar stiffness (EIF), the mechanism of mutability at the nanoscale can be demonstrated directly. A model of stiffness modulation via enhanced fibrillar recruitment is developed to explain the biophysical mechanisms of MCT. Understanding the mechanisms of MCT quantitatively may have applications in development of new types of mechanically tunable biomaterials.

Benefits of two-dimensional detectors for synchrotron X-ray diffraction studies of thin film mechanical behavior

2008 ◽  
Vol 41 (6) ◽  
pp. 1076-1088 ◽  
Author(s):  
Guillaume Geandier ◽  
Pierre-Olivier Renault ◽  
Simon Teat ◽  
Eric Le Bourhis ◽  
Bruno Lamongie ◽  
...  
Keyword(s):  
Thin Film ◽  
Tensile Testing ◽  
Gold Films ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Reflection And Transmission ◽  
Strain Measurements ◽  
X Ray ◽  
Polycrystalline Thin Films

Performing a completein situmechanical property analysis of polycrystalline thin films using X-ray diffraction is time consuming with most standard diffraction beamlines at synchrotron facilities and not realistic with laboratory diffractometers. Two-dimensional detection is shown to enable relatively fast and reliable X-ray strain measurements duringin situtensile testing of gold films deposited on polyimide substrates. Advantages and drawbacks in the use of two-dimensional detectors for this type of analysis are discussed for two commonly used geometries: reflection and transmission.

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