Air-film cooling holes were drilled into a turbine blade with 532-nm Nd:YVO4 nanosecond laser in air and coaxial waterjet assistance. The drilling quality of the sidewalls was investigated comparatively by means 3D confocal scanning microscope, electron microscopy, transmission X-ray diffraction energy-dispersive spectroscopy. Results have shown that maximum thickness processing-induced defects...

Continuous electrical discharge machining (EDM) is characterized by random positions, uncertain energy, extremely short time, narrow tool-workpiece gaps, etc. Theoretical research into the mechanisms leading to thermal erosion of material and associated surface morphology has become urgent allow continued development application EDM technology. Firstly, multi-pulse theory geometric optimization...

Waterjet guided laser (WJGL) cutting is a relatively new technology for high-precision machining of difficult-to-cut materials. However, its material removal mechanism presents some unique features because the interaction between laser, waterjet and workpiece. This paper investigates surface formation in WJGL Ni-based superalloy influence on fatigue performance. Two different microstructures ha...

Within the tradition of generative grammar, filler-gap constructions and especially island constraints (Ross 1967) have played a crucial role in shaping the grammar and in arguing for a rich system of innate constraints that are specific to language. The existence of island phenomena has given rise to such principles as `Subjacency' (1), `Superiority' (2) (commonly recast as `Attract Closest') ...

Materials and Methods: The study evaluated 10 samples each of fresh alloy, recast alloy with addition of 50% of wt. of new alloy and recast alloy without addition of new alloy. Samples were subjected to computerized Universal Testing Machine and mechanical properties viz. tensile strength, yield strength, percentage of elongation, modulus of elasticity and microhardness was tabulated. Data was ...