Showing papers in "Journal of Materials Processing Technology in 2019"

TL;DR: In this article, a selective laser melting additive layer manufacturing process using unidirectional laser scan to control the texture of 316L parts were fabricated with the selective laser-melting additive layer (SLAM) manufacturing process.

TL;DR: In this article, a finite element analysis (FEA) was used to simulate the melting conditions and fluidity of PEEK in a flow channel, in order to determine the parameters required to 3D print PEEK parts with sufficient surface quality and improved mechanical properties.

TL;DR: In this article, the influence of different laser scan parameters such as hatch spacing, laser power and scan speed on the texture evolution in the manufactured parts is determined, which shows that the texture at the top surface can be very strong especially when a high-laser power and low scanning speed is used.

TL;DR: A computational model based on the discrete element method is employed to study the critical influence of powder cohesiveness on the powder recoating process in AM and shows that cohesive forces dominate gravity forces leading to low quality powder layers not suitable for subsequent laser melting without additional layer/surface finishing steps.

TL;DR: In this paper, the process-structure-property relationship for selective laser melting of Invar 36 and stainless steel 316L is discussed, and an optimum process window has been suggested based on experimental work.

TL;DR: In this article, a comparative study on the in-situ alloying of NiTi shape memory alloys (SMAs) by directed energy deposition (DED), selective laser melting (SLM), and selective electron beam melting (SEBM) processes using pre-mixed Ni-Ti powders is presented.

TL;DR: In this article, the effect of linear energy density on the surface roughness of the vertical planes of the aluminum alloys produced by Selective Laser Melting (SLM) was evaluated.

TL;DR: In this article, the authors evaluated the effect of the addition of solid lubricant in vegetal base oil applied by MQL (Minimum Quantity of Lubricant), when turning Inconel 718, with whisker-reinforced ceramic cutting tools (Al2O3 + SiCw).

TL;DR: In this article, a plate bending fatigue test was conducted to compare the performance of various peening methods used to improve the fatigue strength of stainless steel 316L, and the optimum coverage was examined by measuring the fatigue life at constant bending stress.

TL;DR: In this article, the feasibility of adjusting the printing parameters to print the main structure and support structure using a single type of building material was evaluated and it was found that the solidity ratio, defined as the ratio between actual and expected filament sizes, was significantly affected by the nozzle travel speed and material volume flow rate.

TL;DR: In this article, a comparative analysis of powder-bed-based additive manufacturing (AM) technologies during the production of metallic components using Inconel 625 powder material was performed in terms of microstructure and mechanical properties including ultimate tensile strength, yield strength, percent elongation, and modulus of elasticity (E).

TL;DR: In this paper, the effect of processing parameters in directed energy deposition (DED) additive manufacturing (AM) on the microstructure and mechanical properties of Ti-6Al-4V was evaluated.

TL;DR: In this paper, the influence of arc energy and the thermal field on the resulting mechanical properties and microstructure of the material was analyzed and the results showed that this steel can be used to generate 3D metal components or structures with high reproducibility, near-net-shaped geometry, absence of cracks, and a deposition rate of up to 3.6

TL;DR: In this article, the effect of different process variables such as shielding gas, deposition path and post-fabrication heat treatment on microstructure and mechanical properties were studied, and it was demonstrated that the required tensile properties can be achieved by applying post-deposition heat treatment.

TL;DR: In this paper, the effect of oxide, wire source and heat treatment on the mechanical properties of wire + arc additively manufactured (WAAM) INCONEL 718 was systematically evaluated.

TL;DR: In this article, an autogenous gas tungsten arc welded P92 weld joint was subjected to two different post weld heat treatment (PWHT) procedures, which reduced the heterogeneity gradient along the weld cross section.

TL;DR: In this article, the applicability of minimum quantity cutting fluids (MQCF) can be extended in aggressive machining conditions by using vegetable-based green cutting fluids with solid lubricant nanoparticles as potential additives.

TL;DR: In this paper, the authors used wire arc additive manufacturing (WAAM) based Directed Energy Deposition (DED) process to build two parts, tube and wall from 2209 Duplex Stainless Steel.

TL;DR: In this paper, large diameter rods of Cu-Al-Mn shape memory alloy were gas tungsten arc welded and the microstructural evolution was studied by electron microscopy techniques and its impact on the mechanical and functional response of the welded joints was assessed.

TL;DR: In this paper, the machinability and tool wear of machining SiCp/Al metal matrix composite was compared for dry UAT and conventional turning with the use of a cemented carbide (WC) and a polycrystalline diamond (PCD) tool.

TL;DR: In this paper, a rotating-vibrating magnetic abrasive polishing method was proposed to finish a kind of complex internal surface which has a double-layered tube structure made by selective laser melting (SLM) of Inconel 718.

TL;DR: In this article, a multi-process joining technique that combined resistance spot welding and friction element welding was used to produce a three-sheet multi-stack of advanced high strength steel and precipitation hardened aluminum.

TL;DR: In this article, the authors investigated dissimilar metal weldments between P91 steel and AISI 316 stainless steel fabricated by activated TIG welding (A-TIG) with and without the use of interlayers of Incoloy 800 and Inconel 600.

TL;DR: In this article, the influence of the auxiliary wheel cleaning jet (WCJ) in an attempt to reduce the wheel clogging phenomenon and increase lubri-cooling and machining efficiencies in the cylindrical external grinding of AISI 4340 steel under the application of the minimum quantity lubrication (MQL) technique using aluminum oxide grinding wheel was compared to both flood application (conventional) and MQL without WCJ (traditional) MQL grinding employed oil flow rates of 30, 60 and 120

TL;DR: In this paper, an analytical force model for orthogonal machining of carbon fiber reinforced polymer (CFRP) was developed, which considers the influence of fiber orientation, tool geometry and increasing tool wear.

TL;DR: In this paper, the effect of super vacuum assisted high pressure die casting on the repeatability of the tensile properties of Al-Si-Mg-Mn die-cast alloy was investigated in comparison with conventional HPDC.

TL;DR: In this article, the effect of ultrasonic vibrations on the microstructure and mechanical properties of the joint was investigated. And the results showed that more material around the probe is softened and takes part in the plastic deformation due to the Blaha effect of the ultrasonic vibration.

TL;DR: In this paper, laser shock peening was performed on a 316 L stainless steel part fabricated by Selective Laser Melting (SLM) to increase the stored energy in the material but does not lead to measurable grain refinement.

TL;DR: In this paper, the workpiece vibration induced a strong stir in the molten pool, which removed the fine grain zone at the interlayers and suppressed the porosity of tensile fracture from 6.66% to 1.52%.

TL;DR: In this article, the corrosion and tribocorrosion behavior of SLM-produced Ti6Al4V alloy was studied in comparison with its HP and commercial counterparts in 9 g/L NaCl solution at body temperature.