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Liquid-metal atomization for hot working preformsRapid quenching of a liquid metal by atomization or splat cooling overcomes the major limitation of most solidification processes, namely, the segregation of alloying elements, impurities, and constituent phases. The cooling rates of different atomizing processes are related to the dendrite arm spacings and to the microstructure of the atomized powders. The increased solubility limits and the formation of metastable compounds in splat-cooled alloys are discussed. Consolidation of the powders by hot isostatic compaction, hot extrusion, or hot forging and rolling processes yields billets with properties equivalent to or better than those of the wrought alloys. The application of this powder processing technology to high-performance alloys is reviewed.
Document ID
19740063821
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Grant, N. J.
Pelloux, R. M.
(MIT Cambridge, Mass., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1974
Subject Category
Machine Elements And Processes
Meeting Information
Meeting: Army Materials Technology Conference
Location: Portsmouth, NH
Start Date: October 22, 1972
End Date: October 25, 1972
Accession Number
74A46571
Distribution Limits
Public
Copyright
Other

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