22 research outputs found
An uncertain suggestion for gold-pricing models: the effect of economic policy uncertainty on gold prices
Conditional correlations in the returns on oil companies stock prices and their determinants
Constant conditional correlations, Dynamic conditional correlations, Multivariate GARCH models, Stock price indexes, Brent oil prices, Spot and futures prices, Multivariate cointegration, Hedge ratios, C32, G10, Q40,
Market impact of international sporting and cultural events
Market Efficiency, Event Studies, Mega-Events, Anticipation, JEL Classification, G14—Information and Market Efficiency, Event Studies, G310—Fixed Investment Studies,
Tail dependence between gold and sectorial stocks in China: perspectives for portfolio diversification
Heterotrimeric Kinesin II Is the Microtubule Motor Protein Responsible for Pigment Dispersion in Xenopus Melanophores
Cold Spray Deposition of Freestanding Inconel Samples and Comparative Analysis with Selective Laser Melting
Cold spray offers the possibility of obtaining almost zero-porosity buildups with no theoretical limit to the thickness. Moreover, cold spray can eliminate particle melting, evaporation, crystallization, grain growth, unwanted oxidation, undesirable phases and thermally induced tensile residual stresses. Such characteristics can boost its potential to be used as an additive manufacturing technique. Indeed, deposition via cold spray is recently finding its path toward fabrication of freeform components since it can address the common challenges of powder-bed additive manufacturing techniques including major size constraints, deposition rate limitations and high process temperature. Herein, we prepared nickel-based superalloy Inconel 718 samples with cold spray technique and compared them with similar samples fabricated by selective laser melting method. The samples fabricated using both methods were characterized in terms of mechanical strength, microstructural and porosity characteristics, Vickers microhardness and residual stresses distribution. Different heat treatment cycles were applied to the cold-sprayed samples in order to enhance their mechanical characteristics. The obtained data confirm that cold spray technique can be used as a complementary additive manufacturing method for fabrication of high-quality freestanding components where higher deposition rate, larger final size and lower fabrication temperatures are desired