Showing papers on "Spray forming published in 1985"
01 Jul 1985
TL;DR: The concept and principles involved in the spray forming process are presented with particular reference to operating conditions, resulting structures and properties as mentioned in this paper, and some specific modes of spray forming are discussed, namely spray rolling, spray rolling of composites, spray forging, centrifugal spray deposition, spray coating and simultaneous spray peening.
Abstract: The concept and principles involved in the spray forming process are presented with particular reference to operating conditions, resulting structures and properties. Some specific modes of spray forming are discussed, namely spray rolling, spray rolling of composites, spray forging, centrifugal spray deposition, spray coating and simultaneous spray peening. Technical and economic advantages of this new technology are discussed. 13 references.
17 citations
TL;DR: In this article, the results of processing by powder metallurgy, laser melting, low pressure plasma deposition and spray forming are examined, showing that the increased homogeneity obtained by rapid solidification allows for increased alloying and improved hot workability.
Abstract: The improvements in the mechanical properties of nickel-base alloys that have been made possible by rapid solidification processing are reviewed. The results of processing by powder metallurgy, laser melting, low pressure plasma deposition and spray forming are examined. In general, the increased homogeneity obtained by rapid solidification allows for increased alloying and improved hot workability. The refined grain size improves the low and intermediate temperature strength, but leads to lower strengths at high temperature. For the high temperature applications, post solidification grain growth is required, as for example the directional recrystallization of powder metallurgy preforms. The development of a novel means of producing a fine dispersion from amorphous alloy precursors and the recent work attempting to improve the ductility of the intermetallic phases NiAl and Ni3Al are also described.
2 citations
01 Sep 1985
TL;DR: In this paper, the authors developed a fundamental processing science base for spray forming in the Osprey mode, a process in which gas atomized molten metal droplets are interrupted in flight by impingement on a substrate to form a relatively thick deposit.
Abstract: : Spray forming in the Osprey mode is a process in which gas atomized molten metal droplets are interrupted in flight by impingement on a substrate to form a relatively thick deposit The overall objective of this research program is to develop a fundamental processing science base for the process To this end, concurrent experimental and modeling studies focus on droplet velocity and temperature profiles, the mechanism(s) of droplet-substrate interactions, droplet spreading on impact and droplet solidification, and the relationship between process parameters and microstructural integrity of the deposit On-going experimental studies are reviewed and some preliminary results of the modeling work are presented
2 citations