Topic
Spray forming
About: Spray forming is a research topic. Over the lifetime, 1153 publications have been published within this topic receiving 12869 citations. The topic is also known as: spray casting & spray deposition.
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TL;DR: In this article, the processing, materials characterization, and applications of spray formed Cu-15Ni-8Sn, Cr12MoV steel, and GCr15 steel are reported.
26 citations
15 May 2004-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this article, the microstructure evolution of a supercooled droplet under the situation that the nucleation and the growth of the grains occur concurrently during spray forming, a model was developed based on the population dynamics method.
Abstract: In order to describe the microstructure evolution of a supercooled droplet under the situation that the nucleation and the growth of the grains occur concurrently during spray forming, a model has been developed based on the population dynamics method. This model is solved numerically to investigate the solidification behaviors of the gas atomized Al–4.5 wt.% Cu droplets. The results show that the nucleation takes place under a critical supercooling for a given droplet. The grain sizes are significantly different during the period of nucleation and recalescence, but become uniform with the progress of the solidification. In addition, a smaller droplet has a higher cooling rate and a finer microstructure at the end of the solidification.
26 citations
TL;DR: In this article, a very good combination of strength and ductility, 630MPa 0.2% proof stress and 14.8% elongation to fracture in tensile test, has been obtained for the 7075 Al alloy after optimizing the processing parameters for spray forming, hot extruding the spray deposit, and peak aging the samples taken from the extruded rod.
Abstract: In the present investigation, a very good combination of strength and ductility, 630MPa 0.2% proof stress and 14.8% elongation to fracture in tensile test, has been obtained for the 7075 Al alloy after optimizing the processing parameters for spray forming, hot extruding the spray deposit, and peak aging the samples taken from the extruded rod. The spray deposits contained some porosity but it was almost eliminated on hot extrusion. Electron probe microanalysis revealed that even though spray forming was carried out in an open atmosphere, it did not affect the oxygen content and its distribution in the material on spray forming, because the atomizing argon gas provided a protective cover to molten droplets and prevented their oxidation. The chemical composition of the spray-formed material was found to be almost the same as the raw material, and the major alloying elements were found to be uniformly distributed in the extruded rod.
25 citations
Patent•
02 Jan 1992TL;DR: In this article, a metal is spray cast onto a moving substrate using at least two sprays, the first having a solid fraction greater than 20% at the time the spray contacts the substrate, but less than the solid fraction of the second spray.
Abstract: Metal is spray cast onto a moving substrate using at least two sprays, the first of which has a solid fraction greater than 20% at the time the spray contacts the substrate, but less than the solid fraction of the second spray.
25 citations
TL;DR: In this article, the efficiency of two consolidation processing techniques high velocity oxy-fuel (HVOF) spray forming and spark plasma sintering (SPS) which allow to obtain bulk dense nanostructured materials.
25 citations