Automatic system for analysis of micromechanical properties

Étienne, S.; Cavaillé, J.Y.; Pérez, Joseph; Point, R.; Salvia, Michelle

doi:10.1063/1.1137153

Cited by 144 publications

(43 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the current research, a dynamic mechanical measurement was performed in an inverted torsion mode by a mechanical spectrometer in a high vacuum atmosphere, as described by Etienne et al [29]. Experiments were conducted by applying a sinusoidal stress with a constant driving frequency (i.e.…”

Section: Dynamic Mechanical Analysis Experimentsmentioning

confidence: 99%

Characteristics of stress relaxation kinetics of La 60 Ni 15 Al 25 bulk metallic glass

et al. 2015

View full text Add to dashboard Cite

a b s t r a c tThe b relaxation typically plays an important role in the plastic deformation of glassy materials. Compared with amorphous polymers, most of the metallic glasses do not show evident b relaxation based on mechanical spectroscopy. However, La 60 Ni 15 Al 25 bulk metallic glass (BMG) exhibits a prominent b relaxation process, which could be an ideal model alloy to investigate the correlation between the b relaxation and mechanical behavior of metallic glasses. In this work, compressive properties and stress relaxation at high temperature (below glass transition temperature T g ) were studied. Stress relaxation of La 60 Ni 15 Al 25 BMG was measured by uniaxial compressive tests and mechanical spectroscopy around both a and b relaxation temperature domain. At higher temperatures and sufficiently low strain rate, the flow behavior of the La 60 Ni 15 Al 25 BMG could be simulated by a master curve, showing that the behavior is independent of temperature, especially on the proximity of the b relaxation process. Because the existence of the b relaxation, a high value of the activation volume for the plastic deformation could be ascribed to the existence of a specific atomic arrangement in the La 60 Ni 15 Al 25 BMG. It is found that compressive stress relaxation kinetics parameter remains temperature independent below T g .

show abstract

Section: Dynamic Mechanical Analysis Experimentsmentioning

confidence: 99%

Characteristics of stress relaxation kinetics of La 60 Ni 15 Al 25 bulk metallic glass

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Differential scanning calorimetry (DSC) (Perkin-Elmer, DSC-7 under high purity dry nitrogen) was used to investigate the thermal properties of the metallic glasses. The dynamic shear measurements of different bulk metallic glasses were studied by mechanical spectroscopy [also called dynamic mechanical analysis (DMA)] with an inverted forced oscillation pendulum described by Etienne et al 56 Experiments were performed using a sinusoidal stress, either at a fixed temperature and a frequency ranges from 10 −4 to 1 Hz or during continuous heating with a constant heating rate of 3 K/min and a constant frequency. Experimental samples, with the dimensions of 30 mm (length) × 2 mm (width) × 1 mm (thickness), were polished carefully using diamond paste to rule out surface oxidation.…”

mentioning

confidence: 99%

Relaxation of Bulk Metallic Glasses Studied by Mechanical Spectroscopy

2013

View full text Add to dashboard Cite

The relaxational dynamics in metallic glasses (MGs) is investigated by using mechanical spectroscopy. The spectra show that in MGs there are two relaxations: (i) the α relaxation, linked to the glass transition, as observed in other classes of amorphous materials; and (ii) the β relaxation, well observed below the glass transition, with an intensity strongly dependent on the MG composition, the nature of which has been linked to the local microstructure of MGs. For the investigated MGs we find that the intensity and relaxation time of the β relaxation depends, in a reproducible fashion, on the thermal history of the samples. During aging experiments, the intensity decreases (as well as the τ β ) with a time dependence described well by a stretched exponential, with an exponent β aging independent of the driving frequency. Moreover, we find that the activation energy U β and the peak temperature T βp of the β relaxation follow the approximate relationship: U β ≈ 31.5RT βp (for driving frequency 1 Hz), indicating that the high temperature limit of the peak frequency is approximately the same for all the MGs investigated. Finally, the frequency separation of the α and β processes in the mechanical loss spectra for La-and Pd-based metallic glasses is tested against the prediction of the Coupling Model.

show abstract

“…(b) loss factor of "as dried" and "annealed" PS/PBuA nanocomposites against temperature Dynamic mechanical analysis of the samples have been performed in torsion [4] in the temperature range [-170; 150 `C] with a heating rate of 1°C/min at a fixed frequency of 1 Hz. Figure la shows the temperature dependence of the storage shear modulus of the PS and PBuA phases and of various PS-PBuA composites.…”

Section: Materials and Experimental Resultsmentioning

confidence: 99%

Mechanical Behavior of Polymer Nanocomposites: a discrete simulation approach

Chabert

Gauthier

Dendievel³

et al. 2002

MRS Proc.

View full text Add to dashboard Cite

This work reports the dynamic mechanical characterization of nanocomposites based on a poly(butyl acrylate) matrix filled with spherical particles of either polystyrene or silica both of diameter around 100 nm. A discrete numerical simulation, taking into account the microstructure and the nature of contact between reinforcing particles has been developed. This simulation enables to quantify the effect of interactions between filler particles on the elastic modulus, and in a more general sense, to clarify the concept of mechanical percolation. It gives results in very good agreement with experimental data.

show abstract

Automatic system for analysis of micromechanical properties

Cited by 144 publications

References 7 publications

Characteristics of stress relaxation kinetics of La 60 Ni 15 Al 25 bulk metallic glass

Characteristics of stress relaxation kinetics of La 60 Ni 15 Al 25 bulk metallic glass

Relaxation of Bulk Metallic Glasses Studied by Mechanical Spectroscopy

Mechanical Behavior of Polymer Nanocomposites: a discrete simulation approach

Contact Info

Product

Resources

About