Showing papers in "Materials Characterization in 2011"

TL;DR: In this article, the influence of the SLM manufacturing strategy on mechanical properties and microstructure of the as-built Ti-6Al-7Nb alloy was determined by tensile and compression testing.

TL;DR: In this paper, the effect of traverse speed and rotational speed on the microstructure and microhardness of MMC layers was investigated using optical microscopy and scanning electron microscopy (SEM) images.

TL;DR: The microstructure and mechanical properties of Inconel 617/310 austenitic stainless steel dissimilar welds were investigated in this article, where three types of filler materials, including nickel-base fillers, were used to obtain dissimilar joint using the gas tungsten arc welding process.

TL;DR: In this article, the crystallite size, lattice strain, deformation stress, and strain energy density of AA 6061 matrix were determined precisely from the first five most intensive reflection of X-ray diffraction (XRD) and transmission electron microscopy (TEM).

TL;DR: In this article, the microstructure of a cobalt-base alloy (Co-Cr-Mo) obtained by the investment casting process was studied and the resulting microstructures arising from samples poured under industrial environment conditions, of three different Co-CrMo alloys.

TL;DR: In this paper, the compositional and microstructural evolution of different generations of γ′ precipitates during the continuous cooling of a commercial nickel base superalloy, Rene88DT, has been characterized by three dimensional atom probe tomography coupled with energy-filtered transmission electron microscopy studies.

TL;DR: In this article, a novel method was used to produce a nanostructured composite consisting of hydroxyapatite and sodium alginate by varying the composition of the mixture.

TL;DR: In this article, a self-consistent model of static recrystallization occurred during annealing of the heavily deformed AZ31 alloy was proposed, which indicated that it could be well described by JMAK model.

TL;DR: In this paper, the microstructures and mechanical properties of Ti-10Mo and Ti-20Mo alloys (mass%) are investigated to assess the potential use in biomedical applications, and the experimental results indicate that the micro-structures of these alloys are dependent upon the cold rolling, solution heat treatment, and Mo content.

TL;DR: In this article, the size tunability of thioglycerol capped cadmium sulphide nanoparticles has been achieved by controlling the capping reagent concentration as well as annealing temperature through chemical precipitation method.

TL;DR: In this article, solid state reactions between oyster shell powders (calcite polymorph of CaCO 3 ) and calcium pyrophosphate (Ca 2 P 2 O 7 ) or dicalcium phosphate dihydrate (CaHPO 4 2H 2 O, DCPD) were performed through ball milling and subsequently heat treatment.

TL;DR: In this paper, three as-cast strips with different initial solidification structures were produced by twin-roll strip casting process, and the deviation degree of the columnar grain from the normal direction decreases with the increase of melt superheat.

TL;DR: In this paper, the effects of aging heat treatments on β-type Ti-30Nb alloy were investigated to evaluate the kinetics of α″−→−α+ β transformation.

TL;DR: In this paper, the experimental findings on the development of the premixed elemental Al5Cu and Al5cu0.5Mg powder metallurgy alloys were reported and the effects of processing parameters for sintering over microstructure and product properties were highlighted.

TL;DR: In this paper, a simple method to prepare Fe 3 O 4 tetrakaidecahedral microcrystals has been demonstrated using a two-step refluxing and calcination process.

TL;DR: In this article, the in situ Raman micro-spectroscopy was applied to investigate the in vitro reactivity of various bioactive glasses, and the effect of the glass composition and the nature of the soaking fluid on the overall reactivity was addressed.

TL;DR: In this article, the effect of welding and subsequent annealing on the evolution of the crystallographic texture and the anisotropic properties in a 2205 duplex stainless steel was studied.

TL;DR: In this paper, a new processing technique was proposed in which the hot stamping step is followed by a controlled quenching and partitioning process, producing a microstructure containing retained austenite and martensite.

TL;DR: The electrochemical responses of the Cu1.1Fe 1.1S2 crystal modified glassy carbon electrode in NaCl and PBS solution show the irreversible and semi-reversible electrochemical process, respectively, which may originate from the NaCl, PBS solution and ascorbic acid.

TL;DR: In this paper, the grain structure in the matrix of B 4 C particulate reinforced MMCs and their friction stir welds is characterized by using optical metallography and the electron backscatter diffraction (EBSD) technique.

TL;DR: Tubular porous alumina ceramic membrane supports were fabricated by an extrusion-drying-sintering process and then characterized in detail in terms of corrosion resistance in both H2SO4 and NaOH aqueous solutions as mentioned in this paper.

TL;DR: In this paper, the effect of multiple rolling in the temperature interval of 500-1000°C on the microstructure and the tensile behaviour of an austenitic stainless steel was studied.

TL;DR: In this article, microstructure and mechanical response of transient liquid phase joint in a newly developed nickel-based superalloy, Haynes 282, was studied, where insufficient holding time for complete isothermal solidification of liquated insert resulted in the formation of eutectic solidification product along the joint centreline region.

TL;DR: In this article, a constitutive equation that described the flow stress as a function of the strain rate and deformation temperature was proposed for high temperature deformation, and processing maps were constructed to evaluate the efficiency of power dissipation (η) and recognize the instability regimes for the final-forging process.

TL;DR: In this paper, the authors analyzed the hot deformation behavior of 00Cr23Ni4N duplex stainless steel under medium-high strain rates (5 − 50 s − 1 ) using the Zener-Hollomon parameter and processing maps, which is based on compression tests made at temperatures ranging from 900 to 1150 °C.

TL;DR: In this paper, a single-source molecular (silver diethyldithiocarbamate [Ag(DDTC]) as precursor and graphene sheets as a support material was used to construct a nanocomposite with surface-enhanced Raman scattering (SERS) activity.

TL;DR: In this article, the authors reported the grain-resolved elastic strains in about 1000 randomly oriented grains embedded in a polycrystalline copper sample and collected X-ray diffraction data in situ in the undeformed state and at a plastic strain of 1.5% while the sample was under tensile load.

TL;DR: In this article, a composite coating which had high adhesion strength with the substrate was prepared on Mg-Zn-Ca alloy through combined micro-arc oxidation and electrochemical deposition, which consisted of MgO, Mg3(PO4)2, hydroxyapatite and octacalcium phosphate.

TL;DR: In this paper, the wear behavior of severely deformed aluminum sheets by accumulative roll bonding (ARB) process was characterized using a pin on disc wear machine at different conditions, including dry and immersion lubrication, and rotation speeds.