Showing papers in "Scripta Materialia in 1998"

TL;DR: In this article, the hardness of the multilayers for layer thicknesses (h) > 50 nm is explained by Hall-Petch model with grain boundaries and interfaces as barriers.

TL;DR: In this paper, the thermal diffusivity and conductivity of nanocrystalline (gain size < 100 nm) zirconia has not yet been determined and the measured values are compared with the thermal conductivities of commercially available air plasma sprayed (APS) and electron beam physical vapor deposited (EB-PVD) coatings.

TL;DR: In this article, the effects of changes in the notch root radius from 250 m to a fatigue precrack on the fracture toughness of a bulk amorphous glass were determined, and it was shown that the average toughness obtained from 6 fatigue precracked specimens was 18.4 {+-} 1.4 MPa {radical}m, while the notch toughness obtained on specimens with notch root radii ranging from 65 microm-250 microm were in the range of 101--131 MPa{ radical}m.

TL;DR: In this article, the effects of confinement on the motion of dislocations in thin metal films on substrates have been investigated, and it has been shown that the very high strength and high strain hardening rates exhibited by thin metal thin films on a substrate can be explained by considering the effect of confinement.

TL;DR: In this article, a microdendritic (second-phase), equiaxed, cell structure was friction-stir welded with a compositionally modified 1100 aluminum alloy.

TL;DR: In this paper, the authors examined and evaluated the microstructural features, tensile properties and creep resistance of the Mg-Zn-Al (ZA) die casting alloys, and the influence of small additions of Ca and Sr on the tensile and creep properties of ZA alloys was investigated.

TL;DR: In this paper, a cellular automata (CA) technique was used to model DRX under isothermal and constant strain rate conditions using the Potts model, which is similar to the MC method.

TL;DR: In this article, the relative applicability of the widely used Brandon criterion and the more restrictive Palumbo-Aust criterion were investigated by evaluation of experimental results pertaining to the corrosion, cracking, and creep cavitation susceptibility of several commercial metals.

TL;DR: In this paper, the S/N behavior of a bulk amorphous Zr-Ti-Cu-Ni-Be alloy was investigated, with the objective of examining the relationship between fatigue crack initiation and propagation in comparison to behavior in traditional crystalline alloys.

TL;DR: In this paper, the authors used the Electron Back-Scatter Diffraction (EBSD) technique to identify the relevant microstructural features leading to a single micro-crack (unit crack path) and the crystallographic nature of cleavage fracture.

TL;DR: In this paper, a clear relationship between the microstructure and grain orientation has not been established in polycrystalline copper, and this has been the aim of the present study.

TL;DR: In this article, the superplastic-like deformation behavior of a Pd{sub 40}Ni{sub 10}P{sub 20} (at.%) metallic glass was investigated.

TL;DR: In this paper, the electroless NiP and Ni-P-X (X 5 SiC, Al2O3 and B) coatings deposited on a heat treatable Al alloy (6063-T6) were investigated.

TL;DR: In this paper, an analysis is made of the influence of continuous cold drawing on the interlamellar spacing of an eutectoid prestressing steel and the effect of cumulative straining on this microstructural parameter.

TL;DR: In this article, it was suggested that the stress peaks at the beginning of the stress plateau are associated with the nucleation of the product phase for the corresponding transformations and that the stressed plateau corresponds to the process of the transformations.

TL;DR: In this paper, the potential for achieving high strain rate superplasticity (HSR SP) in an Al-3% Mg alloy containing a scandium addition was evaluated.

TL;DR: Zhou et al. as discussed by the authors proposed a method for Chinese Acad Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110015, Peoples R China, USA.

TL;DR: In this article, the results of grain boundary penetration observed in-situ in the TEM were reported, showing that failure occurs primarily by intergranular fracture at applied stress levels as low as zero.

TL;DR: In this article, the authors used a high-resolution CCD camera to collect diffracted patterns in digital form using the ID11, BL2 material science beamline at theEuropean Synchrotron Radiation Facility at Grenoble.

TL;DR: Amorphous metals have generated much interest, both in basic research and for structural applications, because of their near-theoretical strength to stiffness ratio and extremely low damping characteristics as mentioned in this paper.

TL;DR: The European Coal and Steel Community (ECSC-7210. EC/939) and the Spanish Comisio´n Interministerial de Ciencia y Tecnologi´a (CICYTMAT95-1192-CE) as discussed by the authors

TL;DR: In this paper, the authors describe detailed experiments on structure and phase characterization carried out on aluminum-iron alloys after intense torsion straining and show that the severe plastic deformation approach has been used to extend the iron solubility in aluminum and to produce a nano-grained structure in several Al-Fe alloys.

TL;DR: In this paper, the effect of viscosity on the final cellular structure of aluminium foams was investigated using the data measured by the paddle motor voltage during the stirring of the melt.

TL;DR: In this article, the role of rare earth (RE) elements as a refiner was examined by examining the behavior of RE as a solute in the melt of cast Al-Si alloys.

TL;DR: In this paper, a series of experiments in which torsion straining and ECA pressing were applied to an Al-6061 metal matrix composite reinforced with 10 volume % of Al{sub 2}O{sub 3} particulates were conducted.

TL;DR: In this article, the deformation twinning mode of the B19 prime martensite in Ti-50.0 at%Ni alloy was investigated in the second and third stages of tensile deformation.