Damage assessment of Al alloys using in situ tensile tests in x-ray tomography

2008 ◽  
Author(s):  
Suxia Zhou ◽  
Eric Maire ◽  
Jilong Xie ◽  
Andrea Bareggi ◽  
Jerome Adrien ◽  
...  
Keyword(s):  
Damage Assessment ◽  
Tensile Tests ◽  
Al Alloys ◽  
X Ray

scholarly journals Study of the Microstructure and Crack Evolution Behavior of Al-5Fe-1.5Er Alloy

Materials ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 172 ◽  
Author(s):  
Ming Li ◽  
Zhiming Shi ◽  
Xiufeng Wu ◽  
Huhe Wang ◽  
Yubao Liu
Keyword(s):  
Electron Microscopy ◽  
Crack Initiation ◽  
Tensile Tests ◽  
Eutectic Structure ◽  
Interface Structure ◽  
X Ray ◽  
Transmission Electron ◽  
The Matrix ◽  
Evolution Behavior

In this work, the microstructure of Al-5Fe-1.5Er alloy was characterized and analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS) techniques. The effect of microstructure on the behavior of crack initiation and propagation was investigated using in situ tensile testing. The results showed that when 1.5 wt.% Er was added in the Al-5Fe alloy, the microstructure consisted of α-Al matrix, Al3Fe, Al4Er, and Al3Fe + Al4Er eutectic phases. The twin structure of Al3Fe phase was observed, and the twin plane was {001}. Moreover, a continuous concave and convex interface structure of Al4Er was observed. Furthermore, Al3Fe was in the form of a sheet with a clear gap inside. In situ tensile tests of the alloy at room temperature showed that the crack initiation mainly occurred in the Al3Fe phase, and that the crack propagation modes included intergranular and trans-granular expansions. The crack trans-granular expansion was due to the strong binding between Al4Er phases and surrounding organization, whereas the continuous concave and convex interface structure of Al4Er provided a significant meshing effect on the matrix and the eutectic structure.

Micro-Tensile and Fatigue Testing of Copper Thin Films on Substrates

1998 ◽  
Vol 546 ◽  
Author(s):  
M. Hommel ◽  
O. Kraft ◽  
S. P. Baker ◽  
E. Arzt
Keyword(s):  
Elastic Strain ◽  
Fatigue Testing ◽  
Tensile Tests ◽  
Copper Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Tensile Tester ◽  
Elastic Strains ◽  
External Strain

AbstractA special micro-tensile tester was used to carry out tensile tests of thin copper films on substrates. The elastic strain in the film was measured in-situ using x-ray diffraction and the total strain with an external strain gage. From the elastic strains the stresses in the films were calculated and stress-strain curves were obtained. It was observed that the flow stress increases with decreasing film thickness. The method was also applied to investigate the mechanical behavior of films under cyclic loading.

In Situ X-Ray Tomography Studies of Microstructural Evolution Combined with 3D Modeling

MRS Bulletin ◽  
2008 ◽  
Vol 33 (6) ◽  
pp. 611-619 ◽  
Author(s):  
J.-Y. Buffière ◽  
P. Cloetens ◽  
W. Ludwig ◽  
E. Maire ◽  
L. Salvo
Keyword(s):  
Microstructural Evolution ◽  
3D Modeling ◽  
Cellular Materials ◽  
Al Alloys ◽  
Nondestructive Technique ◽  
Metal Solidification ◽  
3D Images ◽  
X Ray ◽  
Tomography Data

AbstractSynchrotron x-ray microtomography is a characterization technique increasingly used to obtain 3D images of the interior of optically opaque materials with a spatial resolution in the micrometer range. As a nondestructive technique, it enables the monitoring of microstructural evolution during in situ experiments. In this article, examples from three different fields of metals research illustrate the contribution of x-ray tomography data to modeling: deformation of cellular materials, metal solidification, and fatigue crack growth in Al alloys. Conventionally, tomography probes the 3D distribution of the x-ray attenuation coefficient within a sample. However, this technique is also being extended to determine the local crystallographic orientation in the bulk of materials (diffraction contrast tomography), a key issue for the modeling of microstructure in metals.

Characterization of the Superelasticity and the Martensitic Transformation from Ti-Nb-(O,N) Biomedical Alloys

2014 ◽  
Vol 783-786 ◽  
pp. 1244-1249 ◽  
Author(s):  
Thierry Gloriant ◽  
Philippe Castany ◽  
Andry Ramarolahy ◽  
Pascal Laheute ◽  
Frédéric Prima ◽  
...  
Keyword(s):  
Martensitic Transformation ◽  
Strong Influence ◽  
Tensile Tests ◽  
Strengthening Effect ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid Solution Strengthening ◽  
Solution Strengthening

In this paper, results concerning newly developed Ti-Nb based superelastic alloys containing interstitial O or N element are presented. These elements were added because of their strong influence on the alpha” martensitic transformation and also because of their solid-solution strengthening effect. Microstructures and mechanical behavior of the alloys were investigated by different methods and compared with a binary Ti-Nb alloy taken as reference. On the other hand, in-situ synchrotron X-ray diffraction analyses during tensile tests have been specifically performed to characterize precisely the stress-induced martensitic transformation in such alloys.

scholarly journals On the Structural Peculiarities of Self-Reinforced Composite Materials Based on UHMWPE Fibers

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1408
Author(s):  
Dmitry Zherebtsov ◽  
Dilyus Chukov ◽  
Isabelle Royaud ◽  
Marc Ponçot ◽  
Ilya Larin ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Compaction Pressure ◽  
Polarized Light ◽  
Tensile Tests ◽  
X Ray ◽  
Hot Compaction ◽  
The Matrix ◽  
Uhmwpe Fibers ◽  
Increasing Temperature

The structure of self-reinforced composites (SRCs) based on ultra-high molecular weight polyethylene (UHMWPE) was studied by means of Wide-Angle X-ray Scattering (WAXS), X-ray tomography, Raman spectroscopy, Scanning Electron Microscopy (SEM) and in situ tensile testing in combination with advanced processing tools to determine the correlation between the processing conditions, on one hand, and the molecular structure and mechanical properties, on the other. SRCs were fabricated by hot compaction of UHMWPE fibers at different pressure and temperature combinations without addition of polymer matrix or softener. It was found by WAXS that higher compaction temperatures led to more extensive melting of fibers with the corresponding reduction of the Herman’s factor reflecting the degree of molecular orientation, while the increase of hot compaction pressure suppressed the melting of fibers within SRCs at a given temperature. X-ray tomography proved the absence of porosity while polarized light Raman spectroscopy measurements for both longitudinal and perpendicular fiber orientations showed qualitatively the anisotropy of SRC samples. SEM revealed that the matrix was formed by interlayers of molten polymer entrapped between fibers in SRCs. Moreover, in situ tensile tests demonstrated the increase of Young’s modulus and tensile strength with increasing temperature.

scholarly journals Lattice Strain Evolutions in Ni-W Alloys during a Tensile Test Combined with Synchrotron X-ray Diffraction

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4027
Author(s):  
Tarik Sadat ◽  
Damien Faurie ◽  
Dominique Thiaudière ◽  
Cristian Mocuta ◽  
David Tingaud ◽  
...  
Keyword(s):  
Solid Solution ◽  
Tensile Test ◽  
Single Phase ◽  
Lattice Strain ◽  
Tensile Tests ◽  
X Ray Diffraction ◽  
X Ray ◽  
Significant Difference ◽  
Diffraction Peaks

Ni and Ni(W) solid solution of bulk Ni and Ni-W alloys (Ni-10W, Ni-30W, and Ni-50W) (wt%) were mechanically compared through the evolution of their {111} X-ray diffraction peaks during in situ tensile tests on the DiffAbs beamline at the Synchrotron SOLEIL. A significant difference in terms of strain heterogeneities and lattice strain evolution occurred as the plastic activity increased. Such differences are attributed to the number of brittle W clusters and the hardening due to the solid solution compared to the single-phase bulk Ni sample.

scholarly journals In-situ analysis of continuous cooling precipitation in Al alloys by wide-angle X-ray scattering

2020 ◽  
Vol 21 (1) ◽  
pp. 205-218
Author(s):  
Christian Rowolt ◽  
Hannes Fröck ◽  
Benjamin Milkereit ◽  
Michael Reich ◽  
Wolfgang Kowalski ◽  
...  
Keyword(s):  
Al Alloys ◽  
In Situ Analysis ◽  
Wide Angle ◽  
X Ray ◽  
Continuous Cooling ◽  
X Ray Scattering ◽  
Ray Scattering

scholarly journals Study of Elastic Behavior of Metallic Thin Films by 2D Synchrotron XRD and in situ Tensile Testing

2007 ◽  
Vol 1027 ◽  
Author(s):  
Geandier Guillaume ◽  
Renault Pierre-Olivier ◽  
Goudeau Philippe ◽  
Eric Le Bourhis ◽  
Girault Baptiste
Keyword(s):  
Thin Films ◽  
Mechanical Response ◽  
Tensile Tests ◽  
Elastic Behavior ◽  
Metallic Thin Films ◽  
X Ray Diffraction ◽  
Synchrotron Source ◽  
X Ray ◽  
Transmission Geometry

AbstractUnderstanding the mechanical behaviour of nano-structured thin films in relation to their structure, in particular to the grain size, is of high importance for the development of technological applications. Model nanometric multilayer W/Au systems exhibiting different structures are elaborated. These films are supported by a (thin) polyimide substrate. Films mechanical response is characterized experimentally by tensile tests carried out in-situ in a X-ray diffractometer installed on a synchrotron source. X-ray diffraction in transmission geometry has been used to study the deformations of both phases as a function of applied load. This geometry has been developed in the aim of optimizing the experiment time.

scholarly journals On the Structural Peculiarities of Self-Reinforced Composite Materials Based on UHMWPE Fibers

2021 ◽  
Author(s):  
Dmitry Zherebtsov ◽  
Dilyus Chukov ◽  
Isabelle Royaud ◽  
Marc Ponçot ◽  
Ilya Larin ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Compaction Pressure ◽  
Tensile Tests ◽  
X Ray ◽  
Structural Peculiarities ◽  
Hot Compaction ◽  
The Matrix ◽  
Uhmwpe Fibers ◽  
The One

The structure of self-reinforced composites (SRCs) based on ultra-high molecular weight 21 polyethylene (UHMWPE) was studied by means of Wide-Angle X-Ray Scattering (WAXS), X-Ray 22 tomography, Raman spectroscopy, Scanning Electron Microscopy (SEM) and in situ tensile testing 23 in combination with advanced processing tools like Avizo, ImageJ, and Ncorr to determine the cor-24 relation between the processing conditions, on the one hand, and the molecular structure and 25 mechanical properties, on the other. SRCs were fabricated by hot compaction of UHMWPE fibers at 26 different pressure and temperature combinations without addition of polymer matrix or softener. 27 It was found by WAXS that higher compaction temperatures led to more extensive melting of 28 fibers with the corresponding reduction of the Herman’s factor reflecting the degree of molecular 29 orientation, while the increase of hot compaction pressure suppressed the melting of fibers within 30 SRCs at a given temperature. X-Ray tomography proved the absence of porosity while polarized 31 light Raman spectroscopy measurements for both longitudinal and perpendicular fiber orienta-32 tions showed qualitatively the anisotropy of SRC samples. SEM revealed that the matrix was 33 formed by interlayers of molten polymer entrapped between fibers in SRCs. Moreover, in situ 34 tensile tests demonstrated the increase of Young’s modulus and tensile strength with increasing 35 temperature.

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