Showing papers in "Scripta Materialia in 1996"

TL;DR: In this paper, it has been shown that submicrometer-grained structures may be produced in a wide range of materials (e.g. pure metals, metallic alloys including superalloys, intermetallics, semiconductors) by subjecting these materials to a very high plastic strain using either equal-channel angular (ECA) pressing or torsion straining under high pressure.

TL;DR: In this article, the size dependence of hardness measurements for a well characterized material such as copper was investigated by examining copper with two different starting dislocation densities (i.e. fully annealed and fully work-hardened).

TL;DR: In this paper, the electrical conduction of (0,degree) unidirectional (UD) CFRP parallel to the fibers is modeled using the parallel resistance approach, which can be taken as an indicator of the evolution of various types of damage in classical longitudinal UD but also in ({+-} 45{degree}) CFRP laminates.

TL;DR: In this paper, the fracture toughness of both submicron and nanocrystalline 3Y-ZrO{sub 2} was found to be low, about 2.5-4.5 MPa{center_dot}m{sup 1/2}, in contrast with the 8.4-8.4 MPaµm{centerµd}m µdµ for a micron-grained 3YµrOµ sub 2 sample.

TL;DR: In this article, the authors used diffusion field impingement to limit nanocrystal growth and maintain the high density of nanocrystals in the amorphous matrix of primary crystallization of metallic glass.

TL;DR: Refractory superalloys as mentioned in this paper are defined as alloys with {gamma}-fcc and {Gamma}{prime}-L1{sub 2} phases coherent structures similar to Ni-base superalloy, and yet with considerably higher melting points.

TL;DR: In this article, the authors focused on improvement of the high-temperature proof strength of ferritic stainless steels, and the mechanism of high temperature strengthening by Nb addition, which was shown to be one of the most effective methods to improve proof strength at highmore temperature, was discussed.

TL;DR: In this paper, a modified form of KJMA equations has been derived by assuming a distribution of pre-existing nuclei, and nucleation rate, and it was found that the inhomogeneous distribution of nuclei can result in two effects: 1) lowering the Avrami exponent, 2.

TL;DR: In this article, the microstructure, micro-and macrotexture and grain boundary distributions, which had been generated by severe plastic deformation (using the equi-channel angular technique) were studied.

TL;DR: In this article, a Taylor factor is used to express a flow stress in a polycrystal in terms of the critical resolved shear stress (CRSS) in the constituent single crystals.

TL;DR: In this paper, the authors combined the way of the Monte Carlo method for microstructure representation with Hesselbarth`s idea of using cellular automata to make the present model as an amended one to simulate grain growth.

TL;DR: In this article, the authors report on efforts to synthesize composites in the Ti-Si-C system using the ternary equilibrium-phase diagram, based on which the composite system(s) were selected.

TL;DR: In this paper, the effect of a strain gradient on coarsened structures was investigated by investigating the coarsening morphologies developed around an indentation in Ni-based single crystal superalloys.

TL;DR: In this article, the authors tried to prove that the appearance of two peaks in the martensitic range on the DTA (Differential Thermal Analysis) cooling curves may be due to changes of dislocation configuration caused by the low-temperature annealing.

TL;DR: In this paper, the fiber size decreases and the TEM studies reveal a strong fiber-matrix orientation relationship, and the interfaces become semi-coherent and almost completely relaxed, with a distance between misfit dislocations in good agreement with the theoretical predictions.

TL;DR: In this paper, the combined effect of the smallest nanoscale grain size in nickel, along with the effect of high elastic strains, resulted in the high level of hardness and also the lower experimentally measured density of these severe plastic deformation consolidation samples.

TL;DR: In this paper, the authors report the results of density measurements by the use of powdered samples instead of bulk material and results of X-ray analyses performed for these samples based on their own density data.

TL;DR: In this article, the wear behavior of TiNi alloy and its variation with microstructure has been studied, and its possible effect on wear resistance has been discussed in this paper.

TL;DR: In this paper, the authors studied the kinetics of static strain aging by means of differential scanning calorimetry (DSC) and thermoelectrical methods (TEP).

TL;DR: The use of fine additive powders in systems having a substantial transient aspect results in a greatly reduced quantity of liquid phase formed during sintering, whereas the use of coarse powders increases the amount of liquid phases that forms and prolongs its existence during sinthing as discussed by the authors.

TL;DR: In this article, a combustion-synthesized TiC/Ti MMC was fabricated for examining the fracture behavior using in situ SEM observation, and the influence of reinforcement characterization on fracture behavior, including particle size, aspect ratio and interfacial chemistry, was investigated.

TL;DR: In this paper, the bend strength of fully dense TiC-based cermets with iron aluminide (Fe-40 at. % Al) as a binder by pressureless melt infiltration has been clearly demonstrated.

TL;DR: In this article, the intermetallic compounds formed in brazes of nickel base filler metals containing chromium, boron and silicon are nickel boride, nickel silicide and chromium borides.

TL;DR: In this article, the first sets of engineering measurements made at the European Synchrotron Radiation facility (ESRF) achieving extremely fast measurement times and high strain resolution in transmission were reported.

TL;DR: In this article, the effect of Cr additions on the hydrogen embrittlement behavior of iron aluminides is addressed from an electrochemical viewpoint, and a possible criterion for the selection of alloying elements (other than the normally reported Cr) to provide enhanced room temperature ductilities to IRs is outlined.

TL;DR: Weiner and Bakker as mentioned in this paper described the phenomenology of amorphization by MM in single composition materials and then discussed some possible mechanisms for such amorphisation, as well as several possible methods for such mechanisms.