Showing papers in "Journal of Materials Processing Technology in 2013"

TL;DR: In this paper, a new mathematical model is developed to include the presence of particles on top surfaces, in addition to the stair step effect, for the accurate prediction of surface roughness.

TL;DR: In this article, the influence of the energy input parameters (80-900°C preheating temperature and 0.08-0.28m/s laser scanning speed) on microstructure and geometry of single tracks fabricated of stainless steel grade 316L powder was analyzed.

TL;DR: In this article, a lattice structure with very low volume fraction was used to anchor the overhang geometry to the base plate and prevent distortion/curling resulting from thermal stresses.

TL;DR: In this paper, a wholistic understanding of factors that influence the development of SLS/SLM processing window, densification, and microstructure of pure Al, Al-Mg, and Al-Si powders, fabricated in single and multiple layer parts by exploring the roles of processing and material parameters was provided.

TL;DR: In this paper, each layer on a linearly deposited steel WAAM part was rolled with either a profile roller, which had a similar shape to the deposited layer, or a slotted roller, in which a groove prevented lateral deformation.

TL;DR: In this paper, the behavior of Polycrystalline Diamond (PCD) tools when machining Ti-6Al-4V alloy at high speed conditions using high pressure coolant supplies was investigated.

TL;DR: In this paper, the authors used electron beam melting (EBM) as a revolutionary technique to produce mass-customized parts to near-net-shape from various metallic materials.

TL;DR: Lou et al. as mentioned in this paper proposed a micro-mechanism-motivated macroscopic ductile fracture criterion in various stress states from shear to plane strain tension where most ductile fractures take place in sheet metal forming processes.

TL;DR: In this paper, photo-induced graft polymerization of poly (ethylene glycol) functionalities onto the surface is used to increase the hydrophilicity of the ABS and increase resistance to non-specific protein adhesion.

TL;DR: In this article, the cold metal transfer (CMT) welding-brazing process provides a potential method to join dissimilar metals, and it is feasible to join aluminum alloys-to-galvanized mild steel using CMT.

TL;DR: In this paper, the authors studied the designing rules and the key points to fabricate the porous structure precisely based on selective laser melting (SLM), and provided theoretical basis for designing and manufacturing of controllable porous structure based on SLM technique.

TL;DR: In this paper, a 2-kW Ytterbium doped fiber laser was used for single-track laser deposition of Inconel 625 wire for single tracks at varying processing parameters.

TL;DR: In this paper, the effect of polymer concentration, cooling rate, stirring and alumina particles on polymer and polymer-ceramic composite particles was investigated, and various post-processing techniques like pressure infiltration (PI), warm isostatic pressing (WIPing) or a combination of both were applied to increase the green density of the Al2O3-polypropylene (PP) SLM parts.

TL;DR: In this paper, a 3D localized finite element model (FEM) was developed to predict likely conditions that result in defect generation during friction stir welding (FSW), where the workpiece was modeled using Eulerian formulation, while the tool was modelled using Lagrangian.

TL;DR: In this article, the effect of cubic boron nitride (cBN) coating on micro-machining of Ti-6Al-4V titanium alloy was investigated.

TL;DR: In this article, the mechanical behavior of open cellular structures produced by Selective Laser Melting (SLM) was investigated under both uniaxial and bending loads, and the results clarified the impact of a post-SLM heat treatment on the mechanical performance of cellular structures made from Ti-6Al-4V.

TL;DR: In this article, a process modeling and a system control to manufacture FGM parts with a direct laser deposition system is presented, which enables to choose an adapted manufacturing strategy and control process parameters to obtain the required material distribution and the required geometry.

TL;DR: In this paper, Li et al. investigated the influence of the main process parameters on the surface finish quality of the direct metal deposition (DMD) with laser, using an Yb-YAG disk laser, and a widely used titanium alloy (Ti-6Al-4V).

TL;DR: In this paper, the influence of plunge depth, rotational speed, plunge rate and time on the microstructure and shear strength of FSSW-Refill was investigated.

TL;DR: In this paper, a method of evaluating stress measurement errors in biaxial tensile tests using a cruciform specimen is proposed, which is assumed to be fabricated from a section of uniformly thick flat sheet metal via laser or water-jet cutting and to have a number of parallel slits cut into each of the four arms.

TL;DR: In this paper, a feature-based tool path generation algorithm for incremental sheet forming (ISF) is presented. And the tool paths are generated according to the specified critical edges and the results suggest that the new tool path stretches the sheet in a different way and results in different thickness distributions.

TL;DR: Friction stir processing (FSP) was applied to modify the microstructure of sintered Al-SiC composites with particle concentrations ranging from 4 to 16vol.

TL;DR: In this paper, a method for implementing collision welding at moderate to small length scales has been developed, where instead of being driven by chemical explosives (explosive welding) or magnetic forces (magnetic pulse welding), a flyer is launched toward the target by the pressure created from the electrically driven rapid vaporization of a thin metallic conductor.

TL;DR: The determination and homogeneity of the sample temperature during consolidation of powders by Spark Plasma Sintering (SPS) is addressed in this article, where a structural transformation activated in a TiAl alloy was used as a marker of sample temperature and finite element modeling were performed to evaluate the temperature at each point of the setup.

TL;DR: In this paper, the authors report the results of formability testing of dual phase steels in EHF conditions and provide an explanation of the observed formability improvement based on analysis of the experimental results and through the use of a modeling technique developed as part of this work for simulating the EHF process.

TL;DR: In this paper, the process monitoring and control in laser aided additive manufacturing (LAAM) were studied and some key issues which affect the process monitor and control were revealed and discussed in detail.

TL;DR: In this paper, a tailored die quenching process of steel parts having a strength distribution using bypass resistance heating in hot stamping was developed, where zones requiring high strength in a quenchable steel sheet were heated, and then were quenched.

TL;DR: In this paper, a heat-treatable and non-heat treatable aluminium alloys were friction stir lap welded to copper using the same welding parameters, and microscopic analysis of the welds enabled to detect important differences in welding results, according to the aluminium alloy type.

TL;DR: Abrasive slurry jet micro-machining (ASJM) uses a well-defined jet of abrasive slurry to erode features in a solid target as mentioned in this paper, which is the dominant material removal mechanism in both ASJM and AJM in spite of the significant flow-induced decrease in the local impact angles of many of the particles in ASJM.

TL;DR: In this paper, the deformation load decreases with the increase of grain size, but this decrease is not significant when there are only a few grains in the cross section of the sheet metal.