Microprobe-type measurement of Young's modulus and Poisson coefficient by means of depth sensing indentation and acoustic microscopy

2002 ◽  
Vol 154 (1) ◽  
pp. 42-48 ◽  
Author(s):  
C. Comte ◽  
J. von Stebut
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Acoustic Microscopy ◽  
Depth Sensing ◽  
Poisson Coefficient

Evaluation of Elastic and Plastic Properties of Ni50Al50(at. %) and (Ni40,Pt10)Al50(at. %) Single Crystals Oriented by Means of Scanning Acoustic Microscopy and Depth Sensing Indentation

2013 ◽  
Vol 81 (3) ◽  
Author(s):  
F. Cleymand ◽  
A. Villemiane ◽  
E. Arab-Tehrany ◽  
C. J. F. Kahn ◽  
Z. Ayadi
Keyword(s):  
Single Crystals ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Acoustic Microscopy ◽  
Indentation Modulus ◽  
Scanning Acoustic Microscopy ◽  
Local Measurement ◽  
Depth Sensing ◽  
Plastic Properties ◽  
Quantitative Measurements

Scanning acoustic microscopy and depth sensing indentation are two techniques used for extracting Young's, shear, and indentation moduli as well as the hardness of materials. In this work, we have applied these techniques on Ni50Al50(at. %) and (Ni40,Pt10)Al50(at. %) single crystals oriented (1 0 0) and (1 1 1) to measure their Young's modulus by two different techniques of local measurement and also the hardness of these alloys. Quantitative measurements highlight that the addition of 10 at.% of platinum induces a 5% decrease of Young's modulus (from 195 to 184 GPa) homogeneously spread over the surface orientations investigated,an 8% decrease of the indentation modulus, and a 40% increase of hardness without orientation effect.

scholarly journals Instrumented Vickers microindentation of alumina-based materials

2006 ◽  
Vol 21 (1) ◽  
pp. 161-173 ◽  
Author(s):  
S. Bueno ◽  
C. Baudin
Keyword(s):  
Electron Microscopy ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Depth Sensing ◽  
Microstructural Parameters ◽  
Aluminium Titanate ◽  
Maximum Stiffness ◽  
Derivatives Of ◽  
Depth Curves ◽  
Scanning Electron

The adequacy of instrumented Vickers depth-sensing microindentation to determine Young's modulus of alumina-based ceramics was analyzed. Monophase alumina materials and alumina + 10 vol% aluminium titanate composites, with different microstructures, were tested to determine the effect of microcracking. The load–depth penetration of the indenter curves together with the observation of the imprints by scanning electron microscopy were used to analyze the behavior of the materials. Maximum stiffness was determined from the derivatives of the load-depth curves during unloading. The areas of the imprints measured optically were more representative of the behavior of the materials than the areas calculated from depth-penetration measurements. The formation of microcracks affected the shape of the unloading portion of the curves. Significant differences between the values of Young's modulus determined for different materials and definite relationships between the microstructural parameters of the materials and the Young's modulus were found.

High Frequency Acoustic Microscopy for the Determination of Porosity and Young’s Modulus in High Burnup Uranium Dioxide Nuclear Fuel

2016 ◽  
Vol 63 (3) ◽  
pp. 1520-1525 ◽  
Author(s):  
Mara Marchetti ◽  
Didier Laux ◽  
Fabiola Cappia ◽  
M. Laurie ◽  
P. Van Uffelen ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Nuclear Fuel ◽  
Uranium Dioxide ◽  
High Frequency ◽  
Young's Modulus ◽  
Acoustic Microscopy ◽  
High Burnup

Young's modulus of thin films using depth-sensing indentation

2010 ◽  
Vol 90 (1) ◽  
pp. 9-22 ◽  
Author(s):  
J.V. Fernandes ◽  
J.M. Antunes ◽  
N.A. Sakharova ◽  
M.C. Oliveira ◽  
L.F. Menezes
Keyword(s):  
Thin Films ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Depth Sensing

scholarly journals Measurement of Young's modulus of clay minerals using atomic force acoustic microscopy

2002 ◽  
Vol 29 (8) ◽  
pp. 13-1-13-4 ◽  
Author(s):  
Manika Prasad ◽  
Malgorzata Kopycinska ◽  
Ute Rabe ◽  
Walter Arnold
Keyword(s):  
Young’S Modulus ◽  
Clay Minerals ◽  
Young's Modulus ◽  
Acoustic Microscopy ◽  
Atomic Force

Possible Artefacts in Measurement of Hardness and Elastic Modulus on Superhard Coatings and the Verification of the Correctness of the Data

2002 ◽  
Vol 750 ◽  
Author(s):  
S. Veprek ◽  
S. Mukherjee ◽  
P. Karvankova ◽  
H.-D. Männling ◽  
J. L. He ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Young’S Modulus ◽  
Indentation Depth ◽  
Brillouin Scattering ◽  
Young's Modulus ◽  
Linear Extrapolation ◽  
Depth Sensing ◽  
Vibrating Reed ◽  
Superhard Coatings ◽  
Scanning Electron

ABSTRACTMeasurements of the hardness and Young's modulus of superhard coatings (HV≥40 GPa) by means of automated load-depth-sensing indentation technique can be subject to a number of errors that are discussed and exemplified here. Only load-independent values of hardness for loads larger than 30–50 mN can be considered reliable when the technique of Doerner and Nix (linear extrapolation of the unloading curve) is used to determine the corrected indentation depth. The results are compared with values of Vickers hardness calculated from the contact area of the remaining plastic deformation which was measured by means of calibrated scanning electron microscope. The values of Young's modulus obtained from the indentation are close to the zero-pressure shear modulus of the coatings as measured by means of Vibrating Reed and surface Brillouin scattering techniques.

In Situ Measurement of the Young’s Modulus of an Embedded Inclusion by Acoustic Microscopy

1997 ◽  
Vol 119 (2) ◽  
pp. 143-147 ◽  
Author(s):  
S. Canumalla ◽  
G. A. Gordon ◽  
R. N. Pangborn
Keyword(s):  
Aluminum Alloy ◽  
Rayleigh Wave ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Target Material ◽  
Acoustic Microscopy ◽  
Alloy Matrix ◽  
Cross Sectional ◽  
Rayleigh Wave Speed

Alumina-silicate inclusions (shot) have been found to adversely affect the mechanical properties of a short alumina-silicate fiber reinforced aluminum alloy (A356). To better understand the differences between the responses of the shot and fibers to applied loads, the Young’s modulus of the shot is measured and compared to that of the fibers. The Rayleigh wave speed in the shot particle (cross-sectional area of 200 μm × 150 μm), measured in situ to be 4041 m/s using a scanning acoustic microscope, was used to calculate the Young’s modulus of the shot particle (132 GPa). The accuracy of the technique and the experimental arrangement used was verified to be better than four percent by independent measurements of the Rayleigh wave speeds in the aluminum alloy matrix and an embedded sapphire fiber. The fiber modulus was estimated to be 225 GPa based on a comparison of previously measured composite modulus with micromechanical predictions. Thus, shot was found to have a Young’s modulus 40 percent lower than that of the fibers. The applicability of the V(z) technique has been demonstrated for measuring the elastic properties over a microscopic area, even when the target material is an embedded inclusion.

Young’s Modulus and Hardness of Zr0.5Hf0.5CoxRh1−xSb0.99Sn0.01 and Zr0.5Hf0.5CoxIr1−xSb0.99Sn0.01 Half-Heusler Alloys

2010 ◽  
Author(s):  
Melody A. Verges ◽  
Paul J. Schilling ◽  
Jeffrey D. Germond ◽  
Puja Upadyhay ◽  
William K. Miller ◽  
...  
Keyword(s):  
Young’S Modulus ◽  
Elastic Moduli ◽  
Young's Modulus ◽  
Heusler Alloys ◽  
Thermal Conversion ◽  
Elastic Stiffness ◽  
Depth Sensing ◽  
Microhardness Testing ◽  
Compositional Changes ◽  
Conversion Efficiencies

Mechanical testing was performed to determine the influence of compositional changes on the Young’s modulus and hardness of half-Heusler compounds of the base composition Zr0.5Hf0.5CoSb0.99Sn0.01. In the efforts to decrease the thermal conductivity of the composition toward the development of thermoelectric materials with high thermal conversion efficiencies, specimens were fabricated with varying amounts of rhodium and iridium at the cobalt site. In addition to the general Zr0.5Hf0.5CoSb0.99Sn0.01 composition, six hot-pressed samples of the Zr0.5Hf0.5CoxRh1−xSb0.99Sn0.01 (0.0≤x≤1.0) composition and four hot-pressed samples of the Zr0.5Hf0.5CoxIr1−xSb0.99Sn0.01 (0.0≤x≤0.7) composition were synthesized. Indentation measurements were obtained using both microhardness testing and depth-sensing nanoindentation. The general Zr0.5Hf0.5CoSb0.99Sn0.01 composition was observed to have a hardness and elastic modulus around 896HV0.2 and 247GPa, respectively. For all of the compositions tested the hardness range was observed to lie between 347HV0.2 and 951HV0.2. The elastic moduli for these compositions were found to range between 97GPa and 247GPa. The effects of the rhodium substitution and iridium substitution at the cobalt site on the elastic stiffness and hardness are examined.

Modeling and Optimization of Nanomechanics of Diamond-Like Carbon by MPCVD Using Response Surface Methodology

2009 ◽  
Vol 79-82 ◽  
pp. 1321-1324
Author(s):  
Jung Sheng Chen ◽  
Ku En Ting ◽  
Hui Ching Wang
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Young’S Modulus ◽  
Hydrogen Concentration ◽  
Microwave Power ◽  
Young's Modulus ◽  
Diamond Like Carbon ◽  
Depth Sensing ◽  
Process Pressure ◽  
Experimental Parameters

Diamond-like carbon (DLC) films have attracted great interest due to their outstanding mechanical, biocompatibility, thermal, optical and electrical properties. The DLC films can be produced by microwave plasma chemical vapor deposition (MPCVD) using Argon, methane and hydrogen mixed gases. The film properties depend strongly on the experimental parameters such as substrate temperatures; microwave power, process pressure and hydrogen concentration (H2/Ar+CH4+H2). In this study, the properties of nanomechanics of DLC films with various experimental parameters are firstly discussed which include hardness and Young’s modulus characterizing by depth-sensing nanoindentation technique. The nanoindentation is an excellent method for measuring nanomechanical properties of both bulk and thin films. The probe was conducted using a Berkovich diamond tip. To find the optimized process parameters, the statistical and mathematical response surface methodology (RSM) is used to model and analyze the effect of substrate temperature (T), microwave power (W), process pressure (P) and hydrogen concentration (H) on the properties of nanomechanics of DLC films. The central composite experimental design (CCD) is used to evaluate the interaction parametric effects of multiple experimental variables on process response (hardness and Young’s modulus). The predictive quadratic model proposed herein considering the analysis of variance (ANOVA) are proved to fit and predict values of the hardness and Young’s modulus close to those readings recorded experimentally. The most significant influential factors for maximizing the hardness and Young’s modulus have been identified from the ANOVA table. The RSM technique is demonstrated to be a powerful tool in exploration of the manufacturing parameters space of complex physical process of DLC films deposition by MPCVD.

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