Mechanical Characterization of Coatings Using Microbeam Bending and Digital Image Correlation Techniques

Eberl, C.; Gianola, Daniel S.; Hemker, Kevin J.

doi:10.1007/s11340-008-9187-4

Cited by 86 publications

(56 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The machine is similar to the testing apparatus used by Eberl et al [23], which was used for testing thin films. Figure 1 illustrates the frame, two linear actuators, alignment stage, load cell, safety springs, and a camera.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Phan

Kelly

Kassner

et al. 2016

Journal of Metallurgy

View full text Add to dashboard Cite

We developed a unique three-point bend testing apparatus to measure bulk mechanical properties of a model metallic glass alloy (SAM2X5 with nominal composition Fe 49.7 Cr 17.1 Mn 1.9 Mo 7.4 W 1.6 B 15.2 C 3.8 Si 2.4 ) prepared by spark plasma sintering. The relatively large sample sizes in the present work allowed for the preparation of test specimens with a macroscale cross section (in the millimeter range) with well-controlled sample dimensions closer to standardized tests. Wire saw cutting allowed for a relatively sharp notch radius (3x smaller than previous studies) and minimal sample damage. We determined that Young's modulus and notch fracture toughness measured by our three-point bending apparatus are 230 GPa and 4.9 MPa⋅m 1/2 . Also, Vickers indentation and flexure testing provided consistent results for Young's modulus. Indentation fracture toughness measured by Vickers indentation produced values at least 50% lower than by flexure. The microscale mechanical properties testing technique presented in this work and subsequent analyses are applicable to specimens of other compositions or ones prepared by other methods.

show abstract

Section: Methodsmentioning

confidence: 99%

“…The actuators control stage movement and are controlled by Matlab software. The camera was used for digital image correlation (DIC) to monitor strain [23]. Fatigue precracks (as specified in ASTM E399) were not achieved due to early fracture.…”

Section: Methodsmentioning

confidence: 99%

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Phan

Kelly

Kassner

et al. 2016

Journal of Metallurgy

View full text Add to dashboard Cite

show abstract

“…Tensile tests of individual fibers were performed in a Nova 200 scanning electron microscope/focused ion beam (SEM/FIB) equipped with a piezo-actuated platform and Femtotools load cells. Strain is calculated using a Matlab routine [48]. For more details about individual wire testing, one can refer to [49][50][51].…”

Section: Methodsmentioning

confidence: 99%

In situ TEM study of twin boundary migration in sub-micron Be fibers

Mompiou

Legros

Ensslen³

et al. 2015

Acta Materialia

View full text Add to dashboard Cite

Deformation twinning in hexagonal crystals is often considered as a way to palliate the lack of independent slip systems. This mechanism might be either exacerbated or shut down in small-scale crystals whose mechanical behavior can significantly deviate from bulk materials. Here, we show that sub-micron beryllium fibers initially free of dislocation and tensile tested in-situ in a transmission electron microscope (TEM) deform by a {1012} 1011 twin thickening. The propagation speed of the twin boundary seems to be entirely controlled by the nucleation of twinning dislocations directly from the surface. The shear produced is in agreement with the repeated lateral motion of twinning dislocations. We demonstrate that the activation volume (V) associated with the twin boundary propagation can be retrieved from the measure of the twin boundary speed as the stress decreases as in a classical relaxation mechanical test. The value of V ≈ 8.3 ± 3.3 × 10 −29 m 3 is comparable to the value expected from surface nucleation. This text is a revised version of the article published in Acta Materialia, 96 (2015) 57-65

show abstract

“…Stress-strain curves were created from photo collections and the time/load UTM data via Digital Image Correlation and Tracking Matlab scripts (Eberl et al 2006). Onedimensional average strains were taken in both the vertical and horizontal directions.…”

Section: Methodsmentioning

confidence: 99%

Elastic constants of green Pinus radiata wood

Davies

Altaner

Apiolaza

2016

N.Z. j. of For. Sci.

View full text Add to dashboard Cite

Background: Mathematical modelling is often used to investigate phenomena difficult or impossible to measure experimentally. Findings: This paper presents the constants needed to mathematically model green Pinus radiata D.Don core-and outerwood. The constants include all three elastic and shear moduli along with the six Poisson ratios needed for describing orthotropic materials in the elastic domain. Further proportional limit surfaces are presented. Conclusions: The constants provided allow for an increase in realism of mathematical models examining the mechanical performance of standing trees.

show abstract

Mechanical Characterization of Coatings Using Microbeam Bending and Digital Image Correlation Techniques

Cited by 86 publications

References 18 publications

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

Bulk Mechanical Properties Testing of Metallic Marginal Glass Formers

In situ TEM study of twin boundary migration in sub-micron Be fibers

Elastic constants of green Pinus radiata wood

Contact Info

Product

Resources

About