Showing papers in "Journal of Materials Processing Technology in 2003"

TL;DR: In this paper, the authors proposed a method for machining aeroengine alloys with improved hardness, such as cubic boron nitride (CBN) tools, for high speed continuous machining.

TL;DR: In this paper, the state-of-the-art concerning powder metallurgy (P/M) aluminum matrix composites is reviewed and compared with other alternatives, and it is remarked that P/M could be remarked as a highly effective and economic method compared to other alternatives.

TL;DR: In this article, the feasibility of processing B4C reinforced Al composite was investigated and a comparison was made with the other two composites by means of optical and scanning electron microscopy (SEM).

TL;DR: In this article, the relationship between welding parameters and tensile properties of the joints has been investigated and it was shown that the tensile property and fracture locations of the joint are significantly affected by the welding process parameters.

TL;DR: In this article, a framework for integrating environmental factors into the supplier selection process is presented and a knowledge-based system is constructed based on the proposed framework and an example is used to illustrate how the knowledge based system would be implemented.

TL;DR: In this paper, the authors describe the methodology and typical results of a fast, reliable and cost effective quality test, which is based on the Rockwell C indentation on planar surfaces of coated compounds.

TL;DR: A semi-empirical model for evaluation of surface roughness of a layered manufactured part by fused deposition modeling is presented in this paper, where a fractional factorial design of experiments, with two levels and four process parameters, is adopted to understand the effect of various process variables.

TL;DR: In this article, the critical thrust force at the onset of delamination is predicted and compared with the twist drill, and the effect of various drill geometries were discussed in analytical fashion.

TL;DR: In this article, an extensive research program was undertaken to establish the relationships between processing conditions and microstructural characteristics and to apply finite-element-method process-modeling techniques and phenomenological microstructure-evolution modeling techniques for the prediction of micro-structure during these processes.

TL;DR: In this article, a three-dimensional finite element model has been developed to simulate the laser welding process and predict laser welded panel distortions, which takes into account thermal, metallurgical and mechanical aspects.

TL;DR: In this article, the relationship between EDM parameters and surface cracks was studied by using a full factorial design, based upon discharge current and pulse-on time parameters, and established a crack prediction map, and indicated whether or not cracks are likely to form for a given pulse-ON and pulse current combination.

TL;DR: In this article, the machinability of silicon carbide particulate aluminium metal matrix composite during turning using fixed rhombic tools was investigated during the fabrication of Al/SiC-MMC and the influence of machining parameters, e.g. cutting speed, feed rate and depth of cut on the tools wear and built-up edges (BUEs) were analyzed.

TL;DR: In this paper, the microstructure and mechanical properties of two-phase α+β titanium alloys after different heat treatment were investigated and the influence of the morphology of lamellar microstructures and phase composition on the tensile properties and fracture toughness of the alloys was studied.

TL;DR: In this article, an integrated and user-friendly environment has been developed to slice the part, plan the deposition parameters, and control the deposition process, including travel speed, touch angle, welding current, and arc voltage, to achieve the required density and three-dimensional geometry.

TL;DR: In this article, the influence of cutting conditions (cutting velocity and feed) and cutting time on turning metal matrix composites (MMCs) was investigated using PCD cutting tools.

TL;DR: In this paper, the acceleration of radial vibration of tool holder as a feedback was used to predict surface finish and dimensional deviation for turning of mild steel rods using HSS and carbide tools.

TL;DR: In this paper, the idea of incremental forming technique has been investigated for production of sheet metal components, and the formability of an aluminum sheet under various forming conditions was assessed and difficult-to-form shapes were produced with the technique.

TL;DR: In this paper, the authors used the Response Surface Methodology (RSM) to model the relationship between the working parameters of a machine tool and the power consumed by the electric motor for every experience of the experimental program.

TL;DR: In this article, an optical sensor has been developed to measure and control the dimension of the thin electrode during the tool fabrication process, and the performance of the micro-EDM process is evaluated in terms of the material removal rate (MRR), tool wear ratio (TWR), and the stability of the machining.

TL;DR: In this article, an iron-based powder blend was developed for rapid tooling using a direct laser sintering process, which was used for manufacturing complex-shaped parts at rates of 6.75 cm 3 /h according to CAD data.

TL;DR: In this paper, a finite element-based model for the electric discharge machining (EDM) process is presented, which uses process parameters such as power input, pulse duration, etc., to predict the transient temperature distribution, liquid-and solid-state material transformation, and residual stresses that are induced in the workpiece as a result of a single-pulse discharge.

TL;DR: In this paper, a development of models which permit to determine surface quality of parts obtained through turning processes is carried out using the response surface methodology, which can be used to measure and characterise surface properties.

TL;DR: The results of the research in ultrasonically assisted machining are presented in this paper, where turning of modern aviation materials was conducted with ultrasonic vibration applied in the feed direction using an autoresonant control system.

TL;DR: In this article, biaxial warm forming behavior in the temperature range 200-350°C is investigated for three automotive aluminum sheet alloys: Al 5754, Al 5182 containing 1% Mn (Al 5182+Mn) and Al 6111-T4.

TL;DR: In this article, the authors present a review of the state-of-the-art in the field of investment casting and explore possible methods for the improvement of shell performance, focusing on the mechanical and physical properties of the ceramic shell.

TL;DR: In this article, a comprehensive study of the surface integrity of the machined workpiece in the electrical discharge machining (EDM) of tungsten carbide is presented, where the surface hardness was determined with a macro-hardness tester.

TL;DR: In this paper, a dynamic-mechanical analysis (DMA) of flax-and hemp-fibre reinforced polypropylenes (PPs) has been performed for material characterisation.

TL;DR: In this article, the authors investigated the possibility of using graphite as a lubricating medium to reduce the heat generated at the grinding zone in surface grinding with a newly developed experimental setup.

TL;DR: In this article, the grey relational analysis is applied for optimizing the electropolishing of 316L stainless steel with multiple performance characteristics, including surface roughness and passivation strength.

TL;DR: In this paper, a single-spark generator has been developed to study the erosion characteristics from the microcrater size using a simple heat transfer model, the efficiency at different discharge condition is also deduced.