Showing papers in "Materials Characterization in 2017"

TL;DR: In this paper, the effect of surface roughness of AlSi10Mg produced by Selective Laser Melting (SLM) followed by stress-relief heat treatment, on the corrosion resistance and corrosion fatigue performance was evaluated.

TL;DR: In this article, the microstructure and mechanical properties of maraging steel parts were investigated and the micro-hardness and tensile strength of the as deposited alloy reduced from the bottom to the top due to the transient thermal cycling, which resulted in partial aging and non-uniform formation of intermetallic compounds along the building direction.

TL;DR: In this paper, the influence of different organic modifiers on structure and optical properties of Fe 3 O 4 nanoparticles has been studied in detail using X-ray diffraction method, transmission electron microscopy, Fourier transform infrared spectroscopy and UV-visible spectrograms.

TL;DR: In this paper, anisotropy in tensile properties between horizontally and vertically built tensile samples is attributed to the higher Schmid factor values of the grains in the vertically built samples than those in horizontally built ones, which is more obvious with laser energy density.

TL;DR: In this article, the effect of various acquisition parameters was examined, along with methods to determine an “average” C-A-S-H composition from SEM-based analysis that are very close to those which can be obtained in the TEM.

TL;DR: In this paper, a multi-pass friction stir processing (FSP) was employed for the first time to disperse graphene in the form of graphene nano-platelets (GNPs) into an AA5052 aluminum-magnesium alloy to fabricate a new Al-Mg/3.vol% GNPs nanocomposite.

TL;DR: In this article, the structural and morphological features of the product phases obtained in isothermal treatments below the martensite start temperature in a low-carbon high-silicon steel were characterized.

TL;DR: In this article, the authors used molybdenum (Mo) as potential reinforcement for aluminum matrix composites produced using friction stir processing (FSP) to improve ductility.

TL;DR: In this article, the microstructure, mechanical and in vitro biodegradable properties of Zn-3Cu-xFe alloys were investigated systematically, and it was shown that the mechanical properties and degradation behavior of these alloys are more suitable than Zn3Cu alloy.

TL;DR: Based on detailed analysis of the precipitates and tensile properties evolution of the alloys, the composite β′ and γ′ precipitates provided much stronger strengthening effects than the only β′ precipitate, even when the latter one had higher number density as mentioned in this paper.

TL;DR: In this article, the size dependence of microstructure of the AlSi10Mg alloy fabricated by selective laser melting (SLM) combined with a powder bed technique was investigated.

TL;DR: In this paper, the effect of electric current on recrystallization kinetics in interstitial free (IF) steel and AZ31 magnesium alloy was investigated based on Vickers hardness measurements and microstructural observation.

TL;DR: In this article, the relationship between intergranular corrosion and crystallographic pitting in AA2024-T351 aluminium alloy during immersion in 3.5% NaCl solution is investigated.

TL;DR: In this paper, a study of the 2060-T8 Al-Li alloy friction stir welded using the rotation speed range of 600-1000rpm at a constant welding speed of 300mm/min is summarized.

TL;DR: The effects of Mo and Nb additions on the microstructure and mechanical properties of two FeCrAl alloys were studied in this article, where fine and uniform recrystallized grain structures were achieved in both alloys through suitable annealing after warm-rolling.

TL;DR: A fully recrystallized ultrafine-grained (UFG) Fe 22.6wt.%C twinning-induced plasticity (TWIP) steel with mean grain size of 576nm was fabricated by cold rolling and annealing process as mentioned in this paper.

TL;DR: In this paper, the size of recrystallized grains and the amount of second-phase particles in the weld nugget zone (WNZ) decreased with decreasing welding ambient temperature.

TL;DR: In this paper, the authors provide an overview of applying mercury intrusion to determine different electrode pore structure properties: coating porosity, pore size distribution, tortuosity, absolute and specific pore volume and the inner coating surface.

TL;DR: In this article, an analysis of 304 austenitic stainless steel plates has been deformed (10 to 40%) by multi-pass cold rolling incorporating soaking at 0°C and −196°C after each pass with an aim to correlate the microstructure and mechanical properties under cold/cryogenically deformed conditions.

TL;DR: In this paper, shot peening of Ti-6Al-4V was performed at air pressures ranging from 0.15 to 0.35 MPa and processing durations ranging from 15min to 60min.

TL;DR: In this paper, the deformation evolution across several crystal orientations for the equiatomic FeNiCoCrMn high entropy alloy at room temperature (RT) and 77 K was explored.

TL;DR: In this paper, low volume fraction SiCp/AZ91 magnesium matrix nanocomposites billets intended for structural applications were synthesized using semisolid stirring assisted ultrasonic vibration, leading to the dispersion of SiC nanoparticles.

TL;DR: In this article, the influence of the curing time on the fracture toughness of concrete produced with different concentrations of coal fly ash (CFA) was investigated and the results showed that, it is possible to make green concrete containing CFA with high fracture toughness.

TL;DR: In this paper, electron backscatter diffraction (EBSD) was used to examine the microstructural evolution in a one-step thermomechanically processed 304 austenitic stainless steel specimen during the grain boundary engineering.

TL;DR: In this paper, the influence of three different ECAP routes on the grain size, texture, dislocation structure and mechanical properties in pre-extruded AX41 magnesium alloy was investigated.

TL;DR: In this paper, the dissolution of an ultra-high strength Al-Zn-Mg-Cu alloy was studied by SEM, TEM, DSC, hardness and electrical conductivity test and the dissolution process gradually reached into a balance with more than 95% had been eliminated and prolonging time imposes no evident influence on promoting the dissolution.

TL;DR: In this article, the growth kinetics of intermetallic compounds generated by initial interfacial reaction (interaction time 2 Al 5 ) and θ (Fe 4 Al 13 ) phase layers in the isothermal experiments in seconds were confirmed.

TL;DR: An innovative hybrid process combining two very effective solid-state techniques which are cold spray (CS) and Friction Stir Processing (FSP) was proposed to fabricate a high-strength ultrafine-grained Cu Zn coating as mentioned in this paper.

TL;DR: In this article, carbon nanotubes reinforced pure aluminum (CNT/Al) composites were fabricated by combined ball milling and powder metallurgy (PM) techniques, and the distribution of CNTs, the evolution of the average Al grain size of the powder mixtures and as-prepared composite bulks were investigated.

TL;DR: In this paper, an improved TMT (thermomechanical treatment) double step hot rolling (DR) including low-temperature pre-deformation, intermediate short-term annealing and final hot rolling, was proposed to manufacture fine grained AA7055 sheets.