Showing papers in "Journal of Materials Processing Technology in 2012"

TL;DR: In this paper, a working envelope for the process using Ti-6Al-4V was developed, and regression models were calculated for total wall width, effective wall width and layer height.

TL;DR: In this article, the authors present a review of various investigations made by researchers in different stages of investment casting and highlight their importance, such as pattern wax properties, effects of blending, additives and fillers.

TL;DR: In this article, the volume-of-fluid method is used to calculate the free surface shape of the keyhole and a ray-tracing algorithm is used in conjunction with a ray tracing algorithm to estimate multiple reflections.

TL;DR: In this paper, the effect of inert gas flow within the selective laser melting (SLM) process and the effects induced by this gas flow on the reproducibility of the key attributes (porosity and compression strength) created in the construction of porous titanium components were investigated.

TL;DR: In this paper, the microstructural properties in terms of grain structure and second phase particles distribution, and also the mechanical properties of the processed zone were addressed with respect to the number of passes and traverse speeds.

TL;DR: In this article, the authors investigated the MUCT of rounded-edge tools and proposed analytical models based on identifying the stagnant point of the workpiece material during the machining process.

TL;DR: In this article, the tool life and chip morphology were compared with different coolant technologies in the case of Ti-6Al-4V turning with constant cutting parameters and coolant nozzle position.

TL;DR: In this article, the authors used a recently developed fracture model combined with finite element analyses to predict the occurrence of fracture in single point incremental forming (SPIF) of two shapes, a cone and a funnel.

TL;DR: In this paper, the influence of welding speed and laser power on weld quality of 16mm thick Ti−−6Al−−4V sheets autogenously laser beam welded in butt configuration using a Nd-YAG laser was studied The joint quality was characterized in terms of weld morphology, microstructure and mechanical properties.

TL;DR: In this article, the dissolution of NaCl in distilled water, the structural integrity of samples and the reproducibility of the procedure were studied as a step prior to sintering, and the characterization of samples included density, porosity and dynamic Young's modulus.

TL;DR: In this paper, high strength steel and aluminium alloy sheets were joined by mechanical clinching with dies for control of metal flow, and metal flow of the sheets was controlled by optimising a shape of the die.

TL;DR: In this article, a finite element (FE) simulation model for micro-cutting with a round cutting edge is developed for Brass 260 and the same process is also simulated with a slip-line field based model.

TL;DR: In this paper, a laboratory-scale hot-formed B-pillar was produced using a segmented die with local heating and cooling zones such that the cooling rate of the blank is controlled locally during the hot forming process.

TL;DR: In this article, the fabrication of open cellular titanium foams by using an innovative spacer through powder metallurgy was investigated, and the porosities and pore structures were investigated by SEM.

TL;DR: In this paper, the effects of alloying elements on the microstructure in the weld and tensile strength of the resultant joint were investigated, and it was found that the thickness of the intermetallic compound (IMC) layer decreased with the increase of Si content.

TL;DR: In this article, the authors proposed the curved layer deposition for FDM, in particular for thin shell-like parts, to ensure fibre continuity, in order to ensure the best interroad and interlayer connectivity, resulting in a continuous network of polymer chains.

TL;DR: In this article, a real-time seam tracking method was proposed to overcome the deficiencies of teaching-playback welding robots in seam tracking during gas tungsten arc welding (GTAW) process.

TL;DR: In this article, the effects of high-frequency vibration on the improvement of surface finish, decrease of the friction at the die-specimen interface, and reduction of forming stress were analyzed and discussed based on the vibration-assisted experiments.

TL;DR: In this article, the authors developed economical shearing methods for use on the press hardened ultra high strength steels which will enhance the tool life and meanwhile to achieve good product quality.

TL;DR: In this paper, a 3D transient finite volume prismatic thermal model is used to quantitatively analyse the material temperature increase in the machined chamfer due to laser-assist during the LAMM process.

TL;DR: In this paper, the static and fatigue strength of mechanically clinched and self-pierce riveted joints in aluminium alloy sheets were compared with those of a resistance spot welded joint.

TL;DR: In this paper, a feedback control system adjusts the laser power such that the width of the melt pool is kept at a user defined reference value using a CMOS camera and software algorithms.

TL;DR: In this article, the results for laser shock peening of duplex stainless steel (22% Chromium-5% Nickel) using a pulsed Nd:YAG laser (wavelength = 532nm, pulse width = 8 nns) for the application to high-capacity pumps for reverse-osmosis type seawater desalination plants are reported.

TL;DR: In this article, the influence of forging force, consumable tilt angle, travel and rotation speeds on interfacial bond properties and process efficiency of mild steel was investigated, and the applied load on the consumable rod was found essential to improve joining efficiency and to increase the deposition rate.

TL;DR: In this article, the results of an investigation of surface damage produced by whisker-reinforced ceramic cutting tools in the finish turning of Inconel 718 were investigated experimentally.

TL;DR: In this article, mechanically sheared edges were characterized for three dual phase steels (DP600, DP780 and DP980), sheared with three die clearances (5%t, 10%t and 15%t) along rolling and transverse directions.

TL;DR: In this paper, a semi-analytical method was proposed to simulate the effects of the shot peening process on thin structures in thin structures, similar to the Almen test on thin plates of Inconel 600.

TL;DR: In this paper, a model based on the shadow created by powder particles on the substrate, with capabilities of estimating the attenuation suffered by the beam and characterizing the density of energy that reaches the surface of the substrate.

TL;DR: In this paper, a series of grinding experiments under the presence/absence of ultrasonic vibration assistance are performed, and the grinding forces and work-surface roughness are measured, while the wheel surface is examined too.

TL;DR: In this article, a methodology is proposed to quantify the surface roughness of the parts processed by laminated object manufacturing (LOM), which is a typical technology in additive manufacturing (AM).