2002
DOI: 10.1007/s11665-002-0012-4
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Quenching of aerospace forgings from high temperatures using air-assisted, atomized water sprays

Abstract: The nickel-based superalloy or titanium materials used in the aerospace industry are cooled from high temperatures during the heat treatment process to obtain appropriate strength properties. However, unacceptably high residual stresses can be developed in some situations if the rate of cooling is too high so that air-assisted, atomized water sprays have been suggested as an alternative to the widely used techniques of quenching in oil or water. Thus, this article examines two aspects of the use of air-water s… Show more

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Cited by 24 publications
(2 citation statements)
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“…The difficulty in achieving fast cooling rate at high initial surface temperature (∼900°C) is the Leidenfrost problem if water is used as a coolant. Due to the aforesaid problem, a vapor film covers the hot plate and as a result the heat transfer rate from the hot surface drastically reduces 8, 9. Hence, the film boiling has been the subject of investigations.…”
Section: Introductionmentioning
confidence: 99%
“…The difficulty in achieving fast cooling rate at high initial surface temperature (∼900°C) is the Leidenfrost problem if water is used as a coolant. Due to the aforesaid problem, a vapor film covers the hot plate and as a result the heat transfer rate from the hot surface drastically reduces 8, 9. Hence, the film boiling has been the subject of investigations.…”
Section: Introductionmentioning
confidence: 99%
“…[9] The superalloys are used for the critical rotating parts for turbinedisc applications, e.g., jet propulsion and electricity generation, where fatigue fracture is a possibility that must be accounted for in the design process. The forgings from which turbine discs are fabricated are machined using high-speed lathes in an intricate way, such that the finished part contains thin sections such as drive arms and webs.…”
Section: Introductionmentioning
confidence: 99%