Acta materialia, Vol. 58 N° 1. Acta materialia - Janvier 2010
| Titre : | Acta materialia, Vol. 58 N° 1. Acta materialia - Janvier 2010 |
| Type de document : | Bulletin |
| Paru le : | 22/07/2010 |
Dépouillements
Article : texte imprimé
J. Weissmüller, Auteur ;
H.-L. Duan, Auteur ;
D. Farkas, Auteur
|
We analyze the various strain measures by which nanoporous materials react to changes in their surface stress and surface stretch at the solid–pore interface. Results of continuum mechanics are given for model geometries, arrays of spheres and f[...]
Article : texte imprimé
J. Gruber, Auteur ;
A.D. Rollett, Auteur ;
G.S. Rohrer, Auteur
|
A critical event model for the evolution of number- and area-weighted misorientation distribution functions (MDFs) during grain growth is proposed. Predictions from the model are compared to number- and area-weighted MDFs measured in Monte Carlo[...]
Article : texte imprimé
Coarsening of a dendritic Al–10 wt.% Cu alloy at 570 °C was investigated by fast in situ X-ray tomography. The variation of the specific solid–liquid interface area as a function of time was found to follow a power-law relation with an exponent [...]
Article : texte imprimé
Anomalous temperature-dependent Young’s modulus of a cast LAST (Pb–Sb–Ag–Te) thermoelectric material
F. Ren, Auteur ;
E. D. Case, Auteur ;
E.J. Timm, Auteur
|
Thermomechanical characterization is important to material evaluation and device design in the development of thermoelectric technology. In this study, we utilize the resonant ultrasound spectroscopy (RUS) technique to examine the elastic behavi[...]
Article : texte imprimé
M.B. Okatan, Auteur ;
J.V. Mantese, Auteur ;
S. P. Alpay, Auteur
|
A non-linear thermodynamic analysis of ferroelectric systems with localized space charges for monolithic and compositionally graded materials is described wherein the electrostatic interlayer interactions are specifically accounted for. The elec[...]
Article : texte imprimé
Y.S. Wong, Auteur ;
S.S. Venkatraman, Auteur
|
Semicrystalline poly(l-lactide), or PLLA, has been reported as possessing shape-memory effect [1], [2], [3], [4] and [5]; however, the mechanism responsible for the shape recovery has not been well addressed. Therefore, in this paper, we attempt[...]
Article : texte imprimé
S. Korte, Auteur ;
W.J. Clegg, Auteur
|
Coherently strained InxGa1−xAs multilayers with zero net strain have been investigated in order to determine the influence of coherency strains on the yield stress. The deformation behaviour has been studied using both ex- and in situ nanoindent[...]
Article : texte imprimé
Samantha Wicks, Auteur ;
Katyayani Seal, Auteur ;
Stephen Jesse, Auteur
|
Grain-to-grain long-range interactions and the ensuing collective dynamics in the domain behavior of nanostructured polycrystalline Pb(Zr,Ti)O3 ferroelectric thin films have been investigated. To identify the key factors and interactions control[...]
Article : texte imprimé
Norihiko L. Okamoto, Auteur ;
Misato Kusakari, Auteur ;
Katsushi Tanaka, Auteur
|
The elastic constants and thermal expansivities in monocrystals of three transition-metal diborides with the AlB2 structure, CrB2, TiB2, and ZrB2, have been investigated in the temperature ranges from 300 to 1373 K and from 300 to 1073 K. The an[...]
Article : texte imprimé
A. Creuziger, Auteur ;
T. Foecke, Auteur
|
The stress-induced transformation behavior of retained austenite is considered in this work. With the development of transformation-induced plasticity (TRIP) steels this deformation mode is of growing importance. Twinned martensite structures we[...]
Article : texte imprimé
Carmine Maletta, Auteur ;
Franco Furgiuele, Auteur
|
A novel analytical method, which predicts the extent of the stress-induced martensitic transformation (SIM) in the crack tip vicinity of nickel–titanium (NiTi)-based shape memory alloys, as well as describing the stress distribution in both tran[...]
Article : texte imprimé
Thomas Wanner, Auteur ;
Edwin R. Fuller Jr., Auteur ;
David M. Saylor, Auteur
|
Quantitative homology metrics are proposed for characterizing the thermal–elastic response of polycrystalline materials. Simulations for a calcite-based polycrystal, marble, are used as an illustrative example. The homology metrics are based on [...]
Article : texte imprimé
R. Roumina, Auteur ;
C.W. Sinclair, Auteur
|
Recovery of an Al–Mg–Sc alloy in the presence of Al3Sc precipitates has been studied. The results demonstrate that recovery can be separated into two stages. The initial stage is precipitate-independent and consistent with the recovery kinetics [...]
Article : texte imprimé
A. Kumar, Auteur ;
S. Ghosh, Auteur ;
B. K. Dhindaw, Auteur
|
In the present work a model for heat transfer during collision of a falling liquid Al–33 wt.% Cu droplet on a 304 stainless steel substrate has been developed on a FLUENT 6.3.16 platform. The model simultaneously takes into account the fluid flo[...]
Article : texte imprimé
Matthew E. Krug, Auteur ;
Alexandra Werber, Auteur ;
David C. Dunand, Auteur
|
The age-hardening response at 300 °C of Al–0.06Sc–0.02RE (at.%, with RE = Tb, Ho, Tm or Lu) is found to be similar to that of binary Al–0.08Sc (at.%), except that a shorter incubation period for hardening is observed, which is associated with na[...]
Article : texte imprimé
X.W. Zhu, Auteur ;
Y. Sakka, Auteur ;
T.S. Suzuki, Auteur
|
The c-axis texture development in seeded Si3N4 with β-Si3N4 whiskers by slip casting in a rotating magnetic field was investigated by powder X-ray diffraction, scanning electron microscopy and thermal anisotropy evaluation, including the effects[...]
Article : texte imprimé
Harald Rösner, Auteur ;
Christoph T. Koch, Auteur ;
Gerhard Wilde, Auteur
|
Local strains at particle–matrix hetero-interfaces in an Al–Pb composite produced by high-energy ball-milling were measured by means of geometric phase analysis (GPA) on the basis of high-resolution transmission electron microscope (HRTEM) image[...]
Article : texte imprimé
We present transmission electron microscopy (TEM) observations of stacking faults (SFs) and their interactions with pyramidal dislocations, in plastically deformed polycrystalline pure magnesium. We have observed well-defined fringes as well as [...]
Article : texte imprimé
Zhu, J., Auteur ;
C. Zhang, Auteur ;
D. Ballard, Auteur
|
The modified cluster/site approximation was used to describe the thermodynamics of the various face-centered cubic phases in Ni–Al–Pt, the Bragg–Williams approximation for the B2 phase, and a modified regular solution formalism for the liquid ph[...]
Article : texte imprimé
C.Q. Chen, Auteur ;
Y.T. Pei, Auteur ;
J.T.M. De Hosson, Auteur
|
Quantitative bending and compression tests on micropillars made of two different amorphous alloys, with tip diameters ranging from 93 to 645 nm, are performed in situ in a transmission electron microscope (TEM). Under microcompression each pilla[...]
Article : texte imprimé
I. Quintana-Alonso, Auteur ;
S.P. Mai, Auteur ;
N.A. Fleck, Auteur
|
A single-edge-notch bend test was developed for the measurement of fracture toughness of a ±45° square lattice made from an elastic-brittle solid. The finite element method was used to obtain the K-calibration for an orthotropic elastic solid, w[...]
Article : texte imprimé
E. Tochigi, Auteur ;
N. Shibata, Auteur ;
A. Nakamura, Auteur
|
An alumina (α-Al2O3) bicrystal with a {1 View the MathML source 0 0}/〈1 1 View the MathML source 0〉 2° low-angle grain boundary was fabricated by diffusion bonding, and the grain boundary was observed by high-resolution transmission electron mic[...]
Article : texte imprimé
A. Hardy, Auteur ;
S. Van Elshocht, Auteur ;
C. Adelmann, Auteur
|
Strontium niobate ultrathin films were processed by water-based chemical solution deposition, an approach that offers environmental benefits. SrNb2O6 and Sr2Nb2O7 show high-k values, which is important for applications such as alternative gate d[...]
Article : texte imprimé
S.S. Quek, Auteur ;
Y.W. Zhang, Auteur
|
We simulated dislocation dynamics in heteroepitaxial multilayer thin film systems, considering the case where threading dislocations emerging from the substrate replicate themselves into the thin film during the film growth process. In the regim[...]
Article : texte imprimé
Hanuš Seiner, Auteur ;
Lucie Bodnárová, Auteur ;
Petr Sedlák, Auteur
|
Anisotropy of elastic properties of ultrafine-grained polycrystalline copper after one, two and four passes of equal-channel angular pressing (ECAP) is investigated by means of ultrasonic methods. For each material, Young’s and shear moduli in t[...]
Article : texte imprimé
T. Marlaud, Auteur ;
Deschamps, A., Auteur ;
F. Bley, Auteur
|
The composition of precipitates in three alloys of the Al–Zn–Mg–Cu system has been investigated for different heat treatments, including peak-aged and over-aged states as well as near-equilibrium conditions, by combining atom probe tomography an[...]
Article : texte imprimé
S. Otarawanna, Auteur ;
C.M. Gourlay, Auteur ;
H.I. Laukli, Auteur
|
Agglomeration and bending of equiaxed crystals were studied by microstructural characterization of specimens produced by near-static cooling, high-pressure die casting and Thixomolding®, where the solidifying crystals experience different levels[...]
Article : texte imprimé
Srikanth Vedantam, Auteur ;
Ashis Mallick, Auteur
|
We have developed a phase-field model for grain growth in the presence of mobile second-phase particles. In this model, each grain and particle is represented by a unique order parameter. The grain boundaries sweep the mobile particles during gr[...]
Article : texte imprimé
Asep Bayu Dani Nandiyanto, Auteur ;
Nobuhiro Hagura, Auteur ;
Ferry Iskandar, Auteur
|
A highly ordered arrangement of pores with multiple sizes in film and particle forms was successfully prepared using the dip-coating and spray-drying methods, respectively. The template-driven self-assembly technique was effective when a combina[...]
Article : texte imprimé
M. Bäurer, Auteur ;
S.-J. Shih, Auteur ;
C. Bishop, Auteur
|
Abnormal grain growth is a commonly observed phenomenon in perovskite materials. In order to study this phenomenon, grain growth experiments were conducted over a temperature range from 1425 to 1600 °C for the model system SrTiO3 to analyse the [...]
Article : texte imprimé
X.H. Zeng, Auteur ;
A. Hartmaier, Auteur
|
The effects of grain size and of crack-tip blunting radius on the fracture toughness of tungsten polycrystals are studied by using a combined dislocation dynamics/cohesive zone model (CZM). Two-dimensional dislocation dynamics are employed to an[...]
Article : texte imprimé
Valentina Zin, Auteur ;
Manuele Dabalà, Auteur
|
This study describes synthesis of Fe–Cr alloy nanoparticles by using a method which couples electrodeposition of metals with the employment of high power ultrasound. The production of alloyed nanoparticles was performed using a 20 kHz titanium a[...]
Article : texte imprimé
S.-H. Choi, Auteur ;
D.H. Kim, Auteur ;
S.-S. Park, Auteur
|
A crystal plasticity finite element method (CPFEM), considering both crystallographic slip and deformation twinning, was developed to simulate the spatial stress concentration in AZ31 Mg alloys during in-plane compression. A predominant twin reo[...]
Article : texte imprimé
Tapan G. Desai, Auteur ;
Paul Millett, Auteur ;
Michael Tonks, Auteur
|
It is well known that within a few hours after startup of a nuclear reactor, the temperature gradient within a fuel element causes migration of voids/bubbles radially inwards to form a central hole. To understand the atomic processes that contro[...]
Article : texte imprimé
Shiyan Pan, Auteur ;
Mingfang Zhu, Auteur
|
A three-dimensional (3-D) sharp interface model is developed to simulate the solutal dendritic growth in the low Péclet number regime. The model adopts a previously proposed solutal equilibrium approach to calculate the evolution of the solid/li[...]
Exemplaires(0)
| Disponibilité | ||||
|---|---|---|---|---|
| aucun exemplaire | ||||
