Showing papers in "Materials & Design in 2017"

TL;DR: In this article, the effect of build orientation, layer thickness and feed rate on the mechanical performance of PLA samples manufactured with a low-cost 3D printer is investigated, where tensile and three-point bending tests are carried out to determine the mechanical response of the printed specimens.

TL;DR: A comprehensive review of the 4D printing process is presented in this article, which summarizes the practical concepts and related tools that have a prominent role in this field and summarizes the unimportant aspects.

TL;DR: In this paper, a review of the current literature on additive manufacturing of 316L stainless steel (SS) related to input parameter scaling relations is presented, where the authors identify a range of Volumetric Energy Density (VED) values that should lead to fully dense parts.

TL;DR: In this article, a multilayer beam model with material parameters varying across layers to achieve graded distributions in both porosity and nanofillers was proposed with a particular focus on the effects of weight fraction, distribution pattern, geometry and size of GPL reinforcements on the free vibration and buckling behaviors of the nanocomposite beam with different metal matrixes and porosity coefficients.

TL;DR: In this paper, fully dense PLA blocks were manufactured by 3D-printing, depositing a polymer filament in a single direction via the fusion deposition method (FDM), and they were cut from printed blocks using conventional machining and used to perform tension, compression and fracture experiments along different material directions.

TL;DR: In this paper, a comprehensive evaluation on the magnetic hyperthermia therapy through the determination of magnetic nanoparticles such as surface chemistry, intrinsic and extrinsic magnetic properties are reviewed.

TL;DR: In this article, it is shown that transitions in microstructure, texture, and properties in fabricated Inconel 718 functionally graded components can be obtained at relatively small or large length scales, depending upon the functional gradient desired in a particular application.

TL;DR: In this paper, the formation mechanisms for these two distinct different structures will help pave the way towards newly designed alloy compositions for the selective laser melting (SLM) process, which is an additive manufacturing technology that offers significant potential for lightweight applications in space, aerospace, and automotive industries as well as in mechanical engineering.

TL;DR: In this article, a high-performance grade 300 maraging steels were fabricated by selective laser melting (SLM) and different heat treatments were applied for improving their mechanical properties.

TL;DR: In this paper, a 3D-printable, flexible, and conductive thermoplastic-based material was successfully developed for strain sensing applications, and the results demonstrate TPU/MWCNT as an excellent piezoresistive feedstock for 3D printing with potential applications in wearable electronics, soft robotics, and prosthetics.

TL;DR: In this paper, a high efficient magnetic levitation melting technique was reported for fabricating bulk equiatomic CoCrFeMnNi high-entropy alloy (HEA) ingot with a diameter of 110mm.

TL;DR: In this article, the authors explore the mechanical properties of functionally graded lattice structures fabricated by an additive manufacturing technique namely, selective laser melting (SLM), with Ti-6Al-4V as the building material.

TL;DR: In this article, the 2D MXene with larger interplanar spacing was successfully obtained by etching Ti 3 AlC 2 with bifluoride (NaHF 2, KHF 2, NH 4 HF 2 ) in single-stage process.

TL;DR: In this article, the influence of laser energy on spattering was investigated, and the formation principle, appearance and compositions of spattering particles were analyzed, which indicated that as the laser energy input increases from 0.32 −10 5 ǫ W/cm 3 to 1.30 −10 −5 W/ cm 3, the intensity and quantity of spatter increases, the metal liquid jetted out even reach to the height of 11 cm.

TL;DR: In this paper, high framerate video recording of Selective Laser Melting (SLM) is used to provide useful insight on the laser-powder interaction and melt pool evolution of 316L powder layers, while also serving as a novel instrument to quantify cooling rates of the melt pool.

TL;DR: A successful demonstration of integrated strengthening using Hall-Petch and precipitation strengthening is shown in the fcc based high entropy alloy (HEA) Al0.3CoCrFeNi, leading to quantitative determinations of the Hall-petch coefficients for both hardness and tensile yield strength, as well as the enhancements in the yield strength from two distinct types of ordered precipitates, L12 and B2 as mentioned in this paper.

TL;DR: In this paper, the authors provide a simple and comprehensive MCDM-based framework for solving the general material selection problem under the COPRAS, TOPSIS and DEA paradigm.

TL;DR: In this article, the microstructural design of Inconel 718 specimens produced by selective laser melting (SLM) was adjusted through process parameters manipulation and post-process heat treatment, and the effects of heat treatment on microstructure, process induced defects, deformation behaviour and failure mechanisms were studied.

TL;DR: In this article, a photopolymer printable by stereolithography apparatus (SLA) which uses a tBA-co-DEGDA network based on dual-component phase switching mechanism to build parts of complex geometries and exhibit shape memory behavior.

TL;DR: In this article, a comparative study of in-plane uniaxial compression loading behavior of regular honeycomb, reentrant auxetic honeycomb and locally reinforced auxetic-strut structure was conducted on 3D printed samples.

TL;DR: In this article, the effects of scanning speed and defocusing distance on the melting mode transition in selective laser melting of Al7050 powder were investigated, and the results showed that the defocusing distances had a significant effect on the forming of keyhole mode.

TL;DR: In this article, a method for using neutron diffraction to validate thermomechanical models developed to predict the residual stresses in Inconel 625 walls fabricated by laser-based directed energy deposition was presented.

TL;DR: In this paper, three types of triply periodic minimal surfaces (TPMS) are utilized to create novel polymeric cellular materials (CM), and their properties are tested to provide inputs and serve as validation for finite element modeling.

TL;DR: In this article, a review on the tribological performance of 2D nanomaterials as lubricant additives is presented, and the mechanisms of improved lubrication by these nanommaterials are described.

TL;DR: In this paper, a 3D printed metamaterials with performance-driven functionality built directly into materials is designed and implemented using fused decomposition modeling (FDM) and finite element (FE) formulation.

TL;DR: In this paper, the thermal stability of CoCrFeNi high entropy alloy in as-milled and sintered conditions was investigated using X-ray diffraction, differential scanning calorimetry, transmission electron microscopy, and atom probe tomography.

TL;DR: In this article, the authors used scanning electron microscopy, combined with electron back-scattered diffraction, and residual stress assessment, using neutron diffraction method to investigate the effect of hatch length variation on the texture and microstructures of Inconel 718 samples.

TL;DR: In this article, the current potentials of cold gas dynamic spraying (CGDS) have been reported, and some recent challenges of cold spraying have been discussed, as well as future research directions to increase the enactment of CGDS as a proven viable innovative additive manufacturing method.

TL;DR: In this article, the role of pore characteristics in determining normalized values stiffness, strength, and permeability was explored for a library of 240 TPMS-based unit cells (comprised of 10 volume fractions of 24 selected architectures).

TL;DR: In this paper, a modified Halpin-Tsai micromechanics model that takes into account the GPL geometry effect is adopted to estimate the effective Young's modulus of GPLRC layers.