Showing papers in "Journal of Materials Processing Technology in 2010"

TL;DR: In this article, the state of the art in the thermal, mechanical, microstructural, and technological fields of hot stamping is reviewed, and the investigations of all process sequences, from heating of the blank to hot stamps and subsequent further further processes are described.

TL;DR: In this article, the effects of the processing parameters such as scanning speed and laser power on single tracks formation are explored, and a considerable negative correlation is found between the thermal conductivity of bulk material and the range of optimal scanning speed for the continuous single track sintering.

TL;DR: In this paper, the heat treatment of gravity cast aluminium components normally involve a solution heat treatment followed by quenching and subsequent ageing, either naturally or artificially, and the mechanical properti...

TL;DR: In this paper, the authors present a thorough survey of academic work on the analysis and application of the mechanics of spinning, including the evolution of the stress state and the strain history of the workpiece in both conventional and shear spinning.

TL;DR: In this paper, the authors used a pulsed 550 W Nd:YAG laser to produce thin wall Inconel 625® parts using pulse shapes that delivered a variety of different energy distributions.

TL;DR: In this article, the history of Incremental Sheet Forming (ISF) focusing on technological developments is described, and an extensive list of patents including Japanese patents is provided, and the overall conclusion is that ISF has received the attention of the world, in particular of the automotive industry.

TL;DR: In this paper, a 3D transient finite element method for a moving Gaussian laser heat source was developed to predict the depth and width of the heat affected zone on the Ti6Al4V alloy workpiece.

TL;DR: In this article, an algorithm based on a hypoelastic behaviour is proposed for the simulation of composite reinforcement forming processes, which can correctly trace the specific behaviour of the woven materials.

TL;DR: A intelligent recognition system, composed of the feature extraction and the SVM, has an accuracy rate of 95% for the identification of stable, transition and chatter state after being trained by the experiment data.

TL;DR: In this paper, the authors used the Modified Mohr-Coulomb fracture criterion (MMC) to predict the formation of shear-induced fracture in sheet metal forming and showed that the location of fracture as well as the magnitude of punch travel corresponding to first fracture was correctly predicted by MMC fracture criterion for both circular and square punch.

TL;DR: In this paper, the results of twist drilling 1.5 mm diameter holes in 3 mm thick carbon fiber reinforced plastics laminate using tungsten carbide (WC) stepped drills were presented.

TL;DR: In this article, an analysis of material flow during friction stir welding is performed using two different pin profiles: a cylindrical tapered pin with flats and an unthreaded pin with flat faces.

TL;DR: In this article, quantitative relationships between the saturation, surface coverage and roughness with respect to peening time have been established based on aluminum Al2024 test strips and the relationship between the prebending moment and the resulting arc heights of narrow strips and square strips have been experimentally investigated.

TL;DR: In this paper, blocks for the thermal management of Li-ion battery are prepared, which are made of paraffin wax, which is used as a phase change material (PCM), and graphite flakes.

TL;DR: In this article, a newly developed tool for friction stir spot welding (FSSW) has been proposed, which has no probe, but a scroll tool on its shoulder surface (scroll tool).

TL;DR: In this paper, a new approach for predicting micro-milling cutting forces using the finite element method (FEM) is presented, where the trajectory of the tool and the uncut chip thickness for different micro milling parameters (cutting tool radius, feed rate, spindle angular velocity, and number of flutes) are determined and used for predicting the cutting forces in micromilling.

TL;DR: In this article, the effect of different thickness reductions by cold rolling on the microstructure and mechanical properties of AISI 304L austenitic stainless steel were investigated, and the results indicated that formation of strain-induced martensite clearly resulted in a significant strengthening of the steel.

TL;DR: In this paper, the extruded wire microstructure consisted of fully equiaxed, recrystallized grains and the average grain size in the wires generally increases with the increase of die rotational speed/extrusion power.

TL;DR: In this article, a new hot rolled titanium-microalloyed steel with yield strength of 700 MPa has been developed by CSP (compact strip production) process based on commercial weather resistant steel.

TL;DR: In this article, the effect of the quality of the sheared edge on the stretch flangeability of the high strength steel sheets was examined from expansion of a sheared hole with a conical punch.

TL;DR: In this article, the effect of tool geometry on the plastic flow and material mixing during friction stir spot welding (FSSW) was investigated using the particle method approach using a cylindrical pin tool with flat shoulder.

TL;DR: In this paper, a numerical model which simulates the powder flux distribution on a coaxial nozzle is presented, and a technique based on the selective weight measuring on planes perpendicular to the nozzle axis was used.

TL;DR: In this article, single point turning tests of cylindrical bars were undertaken to analyse and compare the machinability of Ti6Al4V, the most common titanium alloy, and TIMETAL® 54M, a newly developed alloy with similar mechanical properties as Ti6al4V but with better machinsability.

TL;DR: In this paper, an analysis of how the tool path may affect the removal of material in polishing is investigated, and the results show that, for the same path pitch, the peak-to-valley height (hpv) in the inner part of the removal map is the same for scanning, bi-scanning, Hilbert and Peano paths.

TL;DR: In this article, the morphology and distribution of the eutectic carbides of high-speed steel rolls were studied systematically under various solidification rates, which were controlled by using different molds with several initial temperatures.

TL;DR: In this paper, the authors investigated the failure load properties of friction stir spot welds made between wrought and heat-treated AZ31 sheets having widely different average grain sizes, and showed that the hook regions are displaced outwards from the axis of the rotating tool.

TL;DR: In this paper, a coupled set of experiments and numerical simulations using the commercial finite element code ABAQUS/Explicit was used to study the evolution of redundant strains in a single-roller flow forming process in one pass.

TL;DR: In this article, the authors investigated the effect of ultrasonic vibration on the solidification microstructure and mechanical properties of the weld metal of ferritic stainless steel by introducing directly ultrasonic vibrations into the weld molten pool using ultrasonically vibrating filler metal.

TL;DR: In this article, a mathematical model was developed to predict the stress field in the expanded zone, the drawing force required for expansion, and the resulting dissipated energy from which optimum mandrel shapes were obtained.

TL;DR: In this paper, the bending and springback phenomena of a stainless-steel clad aluminum sheet in V-shaped air bending were investigated, and it was found that the sheet set condition (either Al in /SS out or SS in /Al out ) has a great influence on the bending phenomena.