Showing papers in "Materials & Design in 2009"

TL;DR: In this paper, the influence of important process parameters viz., layer thickness, part orientation, raster angle, air gap and raster width along with their interactions on dimensional accuracy of Fused Deposition Modelling (FDM) processed ABSP400 (acrylonitrile-butadine-styrene) part.

TL;DR: In this paper, two kinds of balling phenomena during direct metal laser sintering of 316L stainless steel powder were investigated and the metallurgical mechanisms of the balling were elucidated; it was found that using a low laser power gave rise to highly coarsened balls possessing an interrupted dendritic structure in the surface layer of balls.

TL;DR: In this article, the authors investigated the effects of solid-state phase transformation on welding residual stress and distortion in low carbon and medium carbon steels, based on a sequentially coupled thermal, metallurgical, mechanical 3-D finite element model.

TL;DR: In this paper, a beam theory different from the traditional first-order shear deformation beam theory is used to analyze free vibration of functionally graded beams, where the beam properties are varied through the thickness following a simple power law distribution in terms of volume fraction of material constituents.

TL;DR: In this article, an analytical calculation for determination of weldability domain or welding window is presented, where the welding conditions are tailored through parallel geometry route with different explosive loads and the study is also conducted to consider the effects of explosive loading on the bonding interface and the characterization of explosive welding experiments carried out under different conditions.

TL;DR: In this article, a short carbon fiber reinforced polypropylene (SCF/PP) composite was prepared with melt blending and hot-pressing techniques, and the thermomechanical properties of this composite were investigated taking into account the combined effect of mean fiber length.

TL;DR: In this paper, Brown coir fibres were treated by NaOH solution with concentrations from 2% to 10% separately, and the tensile strength of the samples was shown.

TL;DR: In this paper, the machinability of superalloy, Inconel 718 during high speed turning using tungsten carbide insert (K20) tool was investigated.

TL;DR: In this paper, the effect of processing parameters on the mechanical and microstructural properties of dissimilar AA6082-AA2024 joints produced by friction stir welding was analyzed.

TL;DR: In this paper, an integrated artificial neural networks (ANN) with genetic algorithms (GAs) is proposed to optimize the multi-objectives of material selection to get more sustainable products, not only technical and economic factors, but also environmental factors should be considered.

TL;DR: In this article, the maximum failure load of joints reached 62% of Al-Si alloy base metal with the joints fractured at the interface, and the microstructure evolution and the joining mechanism of aluminum-titanium joints were systematically discussed.

TL;DR: In this paper, an attempt was made to select proper tool pin profile, tool shoulder diameter and tool material to friction stir weld AZ31B magnesium alloy, and five tool pin profiles, five tool materials and three tool shoulder diameters were used to fabricate the joints.

TL;DR: In this paper, a mathematical model was developed to predict tensile strength of the friction stir welded AA6061 aluminium alloy by incorporating FSW process parameters such as tool rotational speed, welding speed, axial force etc., and tool pin profile.

TL;DR: In this article, detailed finite element models of a prototypical car seat and of a seated human are developed and used in the investigation of seated-human/seat interactions and the resulting seating comfort.

TL;DR: In this paper, an approximate finite element model of the joint, taking into account the spatial dependence of the tensile strength properties, was made, modelling a bending test of the weldments.

TL;DR: In this article, the feasibility of producing UHSC using available local materials with the inclusion of steel fibers, and investigate its properties and durability, including different mechanical properties such as compressive strength and splitting tensile strength.

TL;DR: In this paper, the microstructure and mechanical properties of friction stir welds were analyzed and compared with two different tools, and the results showed that the hot welds, obtained with the maximum tool rotational speed and the minimum traverse speed, have improved mechanical properties relative to the cold welds that were in undermatch condition relative to a base material.

TL;DR: In this article, two most potential multi-criteria decision-making (MCDM) approaches are compared and compared relative performance for a given material selection application for different material selection problems.

TL;DR: In this article, a multi-objective optimization framework for thin-walled column with aluminum foam-filler was proposed. And the difference between the single-and multipleobjective optimizations was discussed in a Pareto sense and the importance to seek for multiobjective optimisation was highlighted.

TL;DR: In this article, the authors investigate the temperature evolution, microstructure and mechanical properties of the joint during friction stir welding of thick 2219-O aluminum alloy with the butt joint.

TL;DR: In this article, the wave control characteristics and its droplet transfer process were analyzed by sensing and image method, and the results show that it can realize no-spatter welding and low heat input during welding process.

TL;DR: In this article, the effect of artificial aging on the machinability of 6061 Al-alloy was investigated for the as-received, solution heat treated and then aged (SHTA) conditions.

TL;DR: In this article, two different routes were used to synthesize nano-sized powder of Cu-Al2O3 nanocomposites, with various alumina contents, and to investigate their properties.

TL;DR: In this paper, the effect of heat generation during plastic deformation in new sheet steel with high strength on the mechanical behavior during relaxation test σ ( t ) ∣ e p and during tension at constant strain rate was analyzed.

TL;DR: In this article, Nylon 6 is electrospun to produce ultra-fine nonwovens, and its characteristics as filter media are investigated, including solution concentration, tip-to-collector distance, and feed rate.

TL;DR: In this article, the effects of cryogenic treatment on the wear behavior of D6 tool steel were studied and the findings showed that the effect of the treatment decreases the retained austenite and hence improves the wear resistance and hardness.

TL;DR: In this article, a new class of copper based composite material by dispersing both hard and soft reinforcement in appropriate proportions to ensure optimum tribological characteristics was developed by liquid metallurgy route and the results show that the hybrid composites possess higher hardness, higher tensile strength, better wear resistance and lower coefficient of friction when compared to pure copper.

TL;DR: In this paper, a low cost system of Al 6063 − x TiB 2 ( x ǫ= 0, 5, 10 ¼ ) in situ metal matrix composites were prepared by the reaction mixture of K 2 TiF 6 and KBF 4 with molten alloy.

TL;DR: In this article, the authors investigated the magnetic properties of iron-phosphate-polyepoxy soft magnetic composite materials and showed that the particles surface layer contains a thin layer of nanocrystalline/amorphous phosphate with high coverage of powders surface.

TL;DR: In this paper, the detailed microstructure and tensile properties of as-cast and heat-treated new experimental alloy belonging to cast Al-Si near-eutectic alloys have been investigated as a function of Fe, Mn, Cu, and Mg content.