In situ μ CT-scan Mechanical Tests: Fast 4D Mechanical Identification

Fossil frustules of Ellerbeckia and Melosira were studied using laboratory-based nano X-ray tomography (nano-XCT), transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDS). Three-dimensional (3D) morphology characterization using nondestructive nano-XCT reveals the continuous connection of fultoportulae, tube processes and protrusions. The study confirms that Ellerbeckia is different from Melosira. Both genera reveal heavily silicified frustules with valve faces linking together and forming cylindrical chains. For this cylindrical architecture of both genera, valve face thickness, mantle wall thickness and copulae thickness change with the cylindrical diameter. Furthermore, EDS reveals that these fossil frustules contain Si and O only, with no other elements in the percentage concentration range. Nanopores with a diameter of approximately 15 nm were detected inside the biosilica of both genera using TEM. In situ micromechanical experiments with uniaxial loading were carried out within the nano-XCT on these fossil frustules to determine the maximal loading force under compression and to describe the fracture behavior. The fracture force of both genera is correlated to the dimension of the fossil frustules. The results from in situ mechanical tests show that the crack initiation starts either at very thin features or at linking structures of the frustules.

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The importance of microstructural heterogeneities in the work hardening of ultrafine-grained aluminum, studied by in-situ TEM straining and mechanical tests

Materials Science and Engineering A ◽

10.1016/j.msea.2019.138200 ◽

2019 ◽

Vol 764 ◽

pp. 138200 ◽

Cited By ~ 1

Author(s):

Witold Chrominski ◽

Malgorzata Lewandowska

Keyword(s):

Work Hardening ◽

Mechanical Tests ◽

In Situ Tem ◽

Ultrafine Grained

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Hydrogen-induced amorphization and embrittlement resistance in Ti-based in situ composite with bcc-phase in an amorphous matrix

Journal of Materials Research ◽

10.1557/jmr.2007.0045 ◽

2007 ◽

Vol 22 (2) ◽

pp. 428-436 ◽

Cited By ~ 10

Author(s):

S. Jayalakshmi ◽

J.P. Ahn ◽

K.B. Kim ◽

E. Fleury

Keyword(s):

Hydrogen Embrittlement ◽

Amorphous Alloys ◽

Amorphous Matrix ◽

Mechanical Tests ◽

High Concentration ◽

High Hydrogen ◽

In Situ Composite ◽

Bcc Phase ◽

Embrittlement Resistance

We report the hydrogenation characteristics and mechanical properties of Ti50Zr25Cu25 in situ composite ribbons, composed of β-Ti crystalline phase dispersed in an amorphous matrix. Upon cathodic charging at room temperature, high hydrogen absorption up to ∼60 at.% (H/M = ∼1.2) is obtained. At such a high concentration, hydrogen-induced amorphization occurs. Mechanical tests conducted on the composite with varying hydrogen concentrations indicate that the Ti50Zr25Cu25 alloy is significantly resistant to hydrogen embrittlement when compared to conventional amorphous alloys. A possible mechanism that would contribute toward hydrogen-induced amorphization and hydrogen embrittlement is discussed.

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In Situ Biaxial Mechanical Testing at the Neutron Time-of-Flight Diffractometer POLDI

Materials Science Forum ◽

10.4028/www.scientific.net/msf.768-769.60 ◽

2013 ◽

Vol 768-769 ◽

pp. 60-65 ◽

Cited By ~ 11

Author(s):

Julia Repper ◽

Markus Niffenegger ◽

Steven van Petegem ◽

Werner Wagner ◽

Helena van Swygenhoven

Keyword(s):

Steel Sample ◽

Mechanical Tests ◽

Image Correlation ◽

Uniaxial Deformation ◽

Spatially Resolved ◽

Neutron Diffractometer ◽

Neutron Time ◽

Strain Paths ◽

Biaxial Mechanical Testing

Complex strain paths are often applied to materials during production processes. This paper shows the first successful in-situ biaxial mechanical tests during neutron diffraction performed on a cruciform steel sample and reports on the differences compared to uniaxial deformation. Digital image correlation is demonstrated to be an appropriate tool to monitor spatially resolved the macroscopic straining. The new, modular biaxial machine that will be installed at the neutron diffractometer POLDI is presented.

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On the use of SEM correlative tools for in situ mechanical tests

Ultramicroscopy ◽

10.1016/j.ultramic.2017.08.005 ◽

2018 ◽

Vol 184 ◽

pp. 71-87 ◽

Cited By ~ 8

Author(s):

Qiwei SHI ◽

Stéphane Roux ◽

Félix Latourte ◽

François Hild ◽

Dominique Loisnard ◽

...

Keyword(s):

Mechanical Tests

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First in-situ use of a mobile CT-scan for museum artefacts: The quai Branly – Jacques Chirac museum experience

Forensic Imaging ◽

10.1016/j.fri.2020.200365 ◽

2020 ◽

Vol 20 ◽

pp. 200365

Author(s):

P. Charlier ◽

E. Kissel ◽

C. Moulherat ◽

P.A. Kimmel ◽

Y. Le Fur ◽

...

Keyword(s):

Ct Scan ◽

Museum Experience ◽

Mobile Ct

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IN SITU ROTATIONAL DISLOCATION OF THE TRAPEZOID ASSOCIATED WITH CARPAL-METACARPAL DISLOCATIONS

Hand Surgery ◽

10.1142/s0218810409004141 ◽

2009 ◽

Vol 14 (01) ◽

pp. 31-33 ◽

Cited By ~ 3

Author(s):

M. R. Broadbent ◽

O. S. Bach ◽

A. J. Johnstone

Keyword(s):

Internal Fixation ◽

Ct Scan ◽

Open Reduction ◽

Rare Case ◽

High Energy ◽

Plain Radiographs ◽

Full Extent ◽

Open Fixation

A rare case of in situ rotational dislocation of the trapezoid was described after dislocation of the index and long carpal-metacarpal joints. Due to the difficulty in visualising the trapezoid on plain radiographs, there was a delay in assessing the full extent of the injury. However, after further imaging, the case required open reduction and internal fixation. Therefore, in cases involving high energy dislocations of the second and third metacarpal CMC joints, injury to the peri-trapezoid ligaments should be considered. A pre-operative CT scan or, if not available, open fixation of the CMC joints and trapezoid, is recommended.

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Assessing the Feasibility of Monitoring the Condition of Historic Tapestries Using Engineering Techniques

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.347.187 ◽

2007 ◽

Vol 347 ◽

pp. 187-192 ◽

Cited By ~ 6

Author(s):

Janice M. Dulieu-Barton ◽

M. Sahin ◽

F.J. Lennard ◽

D.D. Eastop ◽

A.R. Chambers

Keyword(s):

Optical Fibre ◽

Strain Measurement ◽

Measurement Techniques ◽

Mechanical Tests ◽

Textile Material ◽

Full Field ◽

Strain Monitoring ◽

Optical Strain Measurement ◽

Optical Strain

The findings of a year-long programme carried out by a multidisciplinary engineering/conservation team are described. A mass-produced textile material that can be used to represent tapestries is identified and mechanical tests are detailed which demonstrate it behaves in a similar way to tapestry. The feasibility of using optical fibre sensors, full-field optical strain measurement techniques and thermography for monitoring tapestry degradation is assessed. The results of preliminary findings are presented and a rationale is developed for in-situ quantitative strain monitoring of tapestries.

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A System for Conducting Sophisticated Mechanical Tests in Situ with High Energy Synchrotron X-Rays Final Technical Report

10.2172/1047279 ◽

2012 ◽

Author(s):

Jeremy Weiss

Keyword(s):

High Energy ◽

Mechanical Tests ◽

X Rays ◽

Technical Report

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Research on Comprehensive Prediction of Rock Burst in Sanshandao Gold Mine

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.170-173.1612 ◽

2012 ◽

Vol 170-173 ◽

pp. 1612-1617

Author(s):

Zheng Sheng Li ◽

Sheng Jun Miao ◽

Fei Hua Ren

Keyword(s):

Stress Measurement ◽

Mechanical Tests ◽

Gold Mine ◽

Research Subject ◽

Rock Stress ◽

Objective Reality ◽

The Past ◽

Rock Structure ◽

Fuzzy Mathematic

The paper takes the deep exploitation of Sanshandao gold mine as the research subject , the methods of distribution of rock structure and lithology examination, in-situ rock stress measurement, physical and mechanical tests of rock, and fuzzy mathematic prediction are used to study rockburst tendency in deep development and exploitation of the mine, which fill the gaps for the past using only one qualitative indexes of rock to judge the possibility of rock bust, and make the evaluation results more close to the objective reality.

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