Recently, the additive manufacturing (AM) technology laser metal deposition (LMD) has gained a lot of attention for processing crack prone high temperature materials such as nickel-based superalloys or intermetallics. A feasibility study on LMD graded transition from binary ß-NiAl to Ni50Al42Ta8 is presented with aim show possibility ß-NiAl-based structures spatially resolved microstructure and...

The extreme luminosity of gamma-ray bursts and their afterglows means they are detectable, in principle, to very high redshifts. Although the redshift distribution of GRBs is difficult to determine, due to incompleteness of present samples, we argue that for Swift-detected bursts the median redshift is between 2.5 and 3, with a few percent likely at z > 6. Thus, GRBs are potentially powerful pr...

Porous NiAl parts were formed by using Ni and Al elemental powders, preformed as diluent NaCl particles space holder (SH). The aim of utilizing (30%-40%) a was to preserve the shape products. amounts SH in 25-50-75 vol.% their sizes 300-500 µm range. samples prepared volume combustion synthesis (VCS). adiabatic temperatures Ni+Al mixtures having 30 40% calculated 1638.9 1460.8°C, respectively. ...

Corrosion surface damage in the form of pitting and micro-cracks is observed in many metals. Cracks usually initiate from the pits and grow under cyclic stresses and eventually lead to material failure. An image analysis based on wavelet transforms and fractals was used to study the corrosion morphology of nickel aluminum bronze metal under varying corrosion conditions and applied stresses. Ima...