Showing papers in "Materials & Design in 1995"

TL;DR: In this article, a wurtzite boron nitride (wBN)-cBN composite tool was used to machine titanium alloys, and the mechanisms controlling the wear of the cutting tool have been found to be similar to those observed in polycrystalline diamond (PCD) and polyCrystalstalline cubic Boron Nitride (PCBN) tools.

TL;DR: In this paper, the dispersion-strengthened copper composites containing 0.3 wt% Al 2 O 3 were sintered in hydrogen at temperatures of 800°C and 900°C.

TL;DR: In this paper, the authors studied the mechanical properties of ZA-27 zinc-aluminium alloy/graphite particulate composites containing graphite particles of size 100-150 μm and of content ranging from 0% to 5% by weight.

TL;DR: In this article, the authors studied the mechanisms of formation of new materials in the solid state using mechanical alloying and found that the diffusion process during mechanical alloys is controlled by both mechanical and thermal energy, while grain boundary and free surface diffusions are found to prevail to enable diffusion to proceed at relatively low temperature.

TL;DR: In this article, the processing and mechanical properties of 2014 and 6061 Al alloy-based power metallurgy composites containing up to 8 vol% of SiC in either particle or continuous fibre form were investigated.

TL;DR: In this paper, a metallographic study of two failed industrial hot forging dies has indicated various failure modes, including possible abrasion, fatigue cracking, chipping and microstructural changes initiated by high thermal loads.

TL;DR: In this paper, the performance of eddy current testing of CFRP composites, assessed using a probability of detection (POD) analysis approach, is also described, and the use of visual data analysis (VDA) for rapid defect location and quantification is discussed.

TL;DR: In this article, the authors describe a study of the mechanical properties of as-cast and heat-treated ZA-27 zinc-aluminium alloy particulate composites containing silicon carbide (SiC) particles of size 100-150 μm and of contents ranging from 0% to 5% by weight.

TL;DR: In this article, the state of the art for joining both traditional and advanced materials for advanced applications is overviewed to provide better understanding of the issues, options, impediments, and opportunities for keeping pace and making needed progress.

TL;DR: In this article, the characteristics of photo-polymerization for the rapid prototyping process have been studied using Sony's Solid Creation System, and both experiments and simulations were carried out to examine the fundamental relationships of some of the key parameters.

TL;DR: In this article, a macro-and micro-combined model was developed to simulate the static and dynamic recrystallizations of austenite during hot rolling of steel, and a micro-constitutive relationship was used to link the macro and micro models.

TL;DR: The final results from the Icelandic part of the Nordic Industrial fund project 'Fatigue under spectrum loading and in corrosive environments' were reported in this article, where the steels ranged from high-strength turbine blade to low-strength steels.

TL;DR: Directed melt oxidation and nitridation are recently developed in-situ methods for the formation of metal-ceramic composites as mentioned in this paper, where a molten alloy is reacted with a gaseous species, i.e., oxygen or nitrogen, to form Al 2 O 3 Al or AlN Al composite microstructures.

TL;DR: In this article, a finite element (FE) analysis is performed on three different insert geometries to assess the efficiency of load transfer in Formula One racing cars, and the results are compared with experimental data obtained from testing a representative panel.

TL;DR: In this article, the effect of artificial ageing on the hardness of cast ZA-27 zinc-aluminium alloy/graphite particulate composites containing graphite particles of size 90-150 μm and of contents ranging from 0% to 5% by weight was investigated.

TL;DR: In this article, a methodology using short-time (less than 24-hour) high-precision stress relaxation tests has been developed to provide comprehensive design information for thermoplastics.

TL;DR: In this paper, an aluminium-based metallic matrix (Al-2wt%Cu) was reinforced with SiC particulates using conventional casting and partial liquid phase casting (rheocasting) techniques.

TL;DR: In this paper, the effect of antimony concentration over modification rating in an Al-Si hypoeutectic alloy via ultrasonic attenuation was determined at frequencies of 1,2.25, 5 and 10 MHz.

TL;DR: This work develops a series of steps for generating material behaviour knowledge from empirical data and exemplifies some of them on several small datasets to demonstrate that symbolic learning techniques are functionally superior to sub-symbolic learning for the task of comprehensible knowledge extraction.

TL;DR: In this paper, the effect of varying the chill rate on the hardness of sub-zero chilled cast iron was examined and it was found that the hardness has a definite linear relationship with the ultimate tensile strength (UTS).

TL;DR: In this paper, the numerical element method was used to determine the effective thermal conductivity of mixed solid materials with discrete phases of different shapes, and two new formulae relating the thermal conductivities of a mixed solid material to the weight percentage and density of the discrete phases were presented.

TL;DR: In this article, a column of a grinding machine has been designed and fabricated using steel fibre reinforced concrete (SFRC) and its static and dynamic performances have been compared with its cast iron counterpart.

TL;DR: In this paper, the influence of thermal history, strain rate and sample geometry on the deformation behavior of polymers was investigated based on observing the polymer surface temperature profile during deformation process.

TL;DR: In this paper, a finite element computer program was developed based on a model of unidirectional heat transmission to predict the effects of concentrated solar energy treatment on steel specimens, and the results were validated by surface heat treatment tests at two solar energy facilities.

TL;DR: In this article, a rationalized approach to the design of micro-mechanisms is described, which focuses on three important design factors: device configuration, materials and fabrication processes.