Showing papers in "Journal of Materials Science & Technology in 2012"

TL;DR: In this paper, a comparative study of selective laser melting (SLM) and electron beam melting (EBM) is presented for the fabrication of complex, multi-functional metal or alloy monoliths by CAD-directed, selective melting of precursor powder beds.

TL;DR: In this paper, the authors present the principal aspects related to this technology, with emphasis on the work material requirements, tool materials and geometry, cutting forces and temperature, quality of the finished product, process modelling and monitoring and machine tool requirements.

TL;DR: In this paper, compressive, flexural and split tensile strength together with coefficient of water absorption of high performance self-compacting concrete containing different amount of Fe2O3 nanoparticles have been investigated.

TL;DR: In vivo subcutis bio-corrosion rate was lower than the corrosion rate for all of the in vitro simulated corrosive environments and the Mg/Mg alloys were biocompatible based on histology results for the liver, heart, kidney, skin and lung of the mouse during the two months implantation.

TL;DR: Different morphologies of undoped and transition metals (Mn, Co and Ni) doped one-dimensional (1D) ZnO nanocrystals were successfully synthesized by chemical method in an air atmosphere using polyvinylpyrrolidone (PVP) as a surfactant.

TL;DR: Friction stir lap welds were produced in 3 mm thick Alclad sheets of Al alloy 2014-T4 using two different tools (with triangular and threaded taper cylindrical pins) as mentioned in this paper.

TL;DR: In this article, an attempt is made to incorporate the Rice husk ash (RHA) particles in the molten aluminum A356.2 alloy by creating a vortex with the help of a mechanical stirrer and the melt temperature was maintained between 800 and 850 °C.

TL;DR: In this article, the microstructure of grain boundaries with different misorientation angles in bicrystals of nickel based superalloys was investigated and the orientation relationship between MC carbides and gamma/gamma' matrix was also determined.

TL;DR: In this article, the effect of the prior austenite grain size on the morphology of the martensite microstructure was studied and the results showed that within the typical industrial application of temperature and holding time set up, as holding time or the temperature increases, the prior Austenite average diameter increases.

TL;DR: In this article, the corrosion performance of Mg-Zn-Y alloys was studied by combining gas-collecting test, immersion test and electrochemical measurements in order to determine the corrosion rate and mechanism of the alloys.

TL;DR: In this article, polypropylene (PP)/titanium dioxide (TiO 2 ) nano-composites were prepared by melt compounding with a twin screw extruder.

TL;DR: In this article, the effect of bainite morphology on mechanical properties of mixed bainites-martensite microstructure in D6AC low alloy ultra-high strength steel has been studied.

TL;DR: In this article, a cellular automaton (CA) model and a phase fleld (PF) model were used to simulate equiaxed dendritic growth during the solidiflcation of hexagonal metals.

TL;DR: In this article, the relationship between SiC content and relative complex permittivity of Si3N4-SiC within the frequency range of 8.2-12.4 GHz (X-band) was investigated.

TL;DR: In this article, the corrosion behavior of Nb coating on H2SO4 and HNO3 treated AISI stainless steel 316L (SS) was evaluated using physical vapor deposition process on the SS.

TL;DR: In this article, a two-step wet etch process was used consisting of etching with 30% HF acid to remove cladding and 24%HF acid to decrease fiber core diameter, and the results of fiber taper showed that the fiber was tapered by a factor of 20 while retaining a thin core structure.

TL;DR: In this paper, an examination of the efiect of coarse TiN particles and ferrite grain size on the Charpy impact transition temperature in high strength low alloyed steels has been carried out.

TL;DR: The growth, transformation, and lattice structure of intermetallic compounds formed between Sn{0.3Ag{ 0.7Cu lead-free solder and copper substrate were investigated in this paper.

TL;DR: In this article, nano-structural Al-doped ZnO thin films of different morphologies were successfully fabricated at substrate temperature of 350 °C by an inexpensive spray pyrolysis method.

TL;DR: In this paper, the authors applied friction stir processing to extruded Al-Mg-Sc alloy to produce fine-grained microstructure with a grain size of 2.2 mu m.

TL;DR: In this paper, the effect of heat input on martensite formation and impact properties of gas metal arc welded modified ferritic stainless steel (409M) sheets with thickness of 4 mm was described in detail.

TL;DR: In this article, the surface integrity of machining in drilling hybrid composites has been discussed and the effect of various cutting parameters on the surface quality and the extent of deformation of the drilled surface due to drilling was investigated.

TL;DR: In this paper, the corrosion evolution of rebar in concrete was monitored by electrochemical impedance spectroscopy (EIS) under dry/wet alternated accelerated corrosion test.

TL;DR: In this paper, the authors measured the complex permittivity and permeability of the composites with a vector network analyzer in a 1-4 GHz frequency range, and the DC electric conductivity was measured by a standard four-point contact method.

TL;DR: The physico-chemical properties of cesium doped SnO 2 nanocrystals synthesized by wet chemical method have been investigated in this paper, where the products formed were chloride and water representing a competitive advantage from the stand point of environmental protection.

TL;DR: In this paper, an inverse method for extracting the elastic-plastic properties of metallic thin films from instrumented sharp indentation has been proposed in terms of dimensional analysis and finite element modeling.

TL;DR: In this paper, the efiect of hot deformation on martensitic stainless steel was carried out in temperatures between 950 to 1100 C and strain rates of 0.001, 0.01 and 0.1 s i1.

TL;DR: In this article, the electromagnetic (EM) wave absorbing property of silicone rubber filled with carbonyl iron particles (CIPs) and multi-walled carbon nanotubes (MWCNTs) was examined.

TL;DR: In this paper, Co doped ZnO nanowires with different Co contents have been fabricated by a chemical vapor deposition method and X-ray diffraction results show that all the samples are of single phase and crystallize in wurtzite Zn O structure.

TL;DR: In this article, the porosity of Y2SiO5 was increased from 45% to 72%, while the compressive strength decreased from 23.2 to 3.1 MPa.