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 authors modeled the thermodynamic properties of liquid ceramic precursor droplets in plasma and analyzed their properties, including aerodynamic droplet breakup, droplet transport, and heat and mass transfer within individual droplets.
Abstract: Thermo-physical processes in liquid ceramic precursor droplets in plasma were modeled. Models include aerodynamic droplet break-up, droplet transport, as well as heat and mass transfer within individual droplets. Droplet size, solute concentration, and plasma temperature effects are studied. Results are discussed with the perspective of selecting processing conditions and injection parameters to obtain certain types of coating microstructures. Small droplets ( 5 microns) tend to surface precipitate-forming shells with liquid core. They may be subjected to internal pressurization leading to shattering of shells and secondary atomization of liquid within. They arrive at the substrate as broken shells and unpyrolized material.
62 citations
Journal Article•
TL;DR: Spray forming in the Osprey mode involves the sequential stages of atomization and droplet consolidation to produce near-net shape preforms as mentioned in this paper, with particular reference to the processing science base and attendant metallurgical principles.
Abstract: Spray forming in the Osprey mode involves the sequential stages of atomization and droplet consolidation to produce near-net shape preforms. This review traces the history and development of the process with particular reference to the processing science base and attendant metallurgical principles. The process has been scaled up for the fabrication of tubular and billet-shaped products in stainless steels, superalloys, cast irons, tool steels, aluminum alloys, and copper alloys. Alloy development via spray forming has resulted in improved mechanical properties, compared to ingot metallurgy
61 citations
TL;DR: In this paper, microstructural analysis was conducted on the second phase constituent particles in various modified 7XXX series alloys produced by spray forming, and the microstructure after extrusion and aging was studied using optical, scanning and transmission electron microscopy.
60 citations
TL;DR: In this article, a novel method of net-form materials synthesis that is related to spray forming has been conceived, and initial verification experiments have been successfully completed, using streams of ultra-uni-form droplets of molten metal that are deposited onto a substrate in a controlled environment.
Abstract: A novel method of net-form materials synthesis that is related to spray forming has been conceived, and initial verification experiments have been successfully completed. The method uses streams of ultra-uni-form droplets of molten metal that are deposited onto a substrate in a controlled environment. The drop-lets are directed onto the substrate with measured angular dispersions as small as 2 × 10-6 radians, and speed dispersions as small as 3.5 × 10-7 times the average speed of the droplet, thereby facilitating the synthesis of small, detailed parts as well as large bulk parts with high resolution and a uniformly fine grain structure.
60 citations
TL;DR: In this paper, several processes including spray forming technology, two passes hot extrusion and substantial heating treatments were operated on an Al-Zn-Mg-Cu-Zr alloy.
60 citations