Transport phenomena relevant to the impact regime of the process of spray deposition: A review. Part 1: Heat transfer
- Univ. of Illinois, Chicago, IL (United States). Mechanical Engineering Dept.
Spray deposition is a novel rapid solidification technology for the creation of advanced metals and metal composites. This technology is particularly attractive to manufacturing because it shows promise to provide materials and products that combine superior properties and near net shape. With reference to the former, the extremely high cooling rates present in the process of spray deposition capture non equilibrium states that cannot be captured by more conventional casting methods because the atomic mobility in the liquid phase of a metal is far greater than that in the solid phase. To this end, the cooling rates at the early stages of the spray deposition process are of the order of (10{sup 6} to 10{sup 8}) {sup 0}C/s. With reference to the latter, the spray deposition process has been shown to produce near net shape products which eliminates the need for additional finishing steps in the manufacturing process. Moreover, the fine and homogeneous microstructure that appears to be resulting from the spray deposition process may eliminate the need for additional mechanical working. In this, as well as its companion paper appearing subsequently in this volume, a review is presented of the existing knowledge base of the impact regime of the process of spray deposition, focusing on issues in which transport phenomena are relevant. Further, this paper addresses only heat transfer aspects of the process which do not involve sophisticated modeling of the accompanying complex fluid dynamics.
- OSTI ID:
- 462603
- Report Number(s):
- CONF-950828-; ISBN 0-7918-1705-9; TRN: IM9719%%73
- Resource Relation:
- Conference: 1995 National heat transfer conference, Portland, OR (United States), 5-9 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 1995 national heat transfer conference: Proceedings. Volume 4: Transport phenomena in manufacturing and materials processing; Transport phenomena in materials joining processes; Transport phenomena in net shape manufacturing; HTD-Volume 306; Mahajan, R.L. [ed.] [Univ. of Colorado, Boulder, CO (United States)]; PB: 261 p.
- Country of Publication:
- United States
- Language:
- English
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