Spray Deposition: A Fundamental Study of Droplet Impingement, Spreading and Consolidation
Abstract
This report summarizes the objectives, approach and salient results of a program on spray casting. Spray casting via the Osprey (tm) process is emerging as a promising technology to produce near-net-shaped components of advanced materials. The process involves the sequential stages of gas atomization and droplet consolidation on a substrate to produce a disk, billet, tube and/or strip. The major advantage of spray casting is the ability to produce uniform, fine grained materials at deposition rates in the range 0.25-2. 5 kg/s in a single operation from the melt. Composite materials can be manufactured by injecting second phase particles into the spray of droplets, or by in-situ reactions between the droplets and the gas during flight. The objectives were to develop a scientific understanding of the physical and thermal phenomena that are active during spray casting and which govern the shape and microstructural integrity of the preforms and to evaluate the Osprey process for processing bulk high strength low alloy steels.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1989
- Accession Number
- ADA217202
Entities
People
- Alan Lawłey
- D. Apelian
- P. Mathur
Organizations
- Drexel University