NDLI: Directional solidification processing of alloys using an applied electric field

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Directional solidification processing of alloys using an applied electric field

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1992
Description	A method is provided for obtaining an alloy having an ordered microstructure which comprises the steps of heating the central portion of the alloy under uniform temperature so that it enters a liquid phase while the outer portions remain solid, applying a constant electric current through the alloy during the heating step, and solidifying the liquid central portion of the alloy by subjecting it to a temperature-gradient zone so that cooling occurs in a directional manner and at a given rate of speed while maintaining the application of the constant electric current through the alloy. The method is particularly suitable for use with nickel-based superalloys. The method of the present invention produces an alloy having superior characteristics such as reduced segregation. After subsequent precipitation by heat-treatment, the alloys produced by the present invention will have excellent strength and high-temperature resistance.
File Size	559055
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20080005961
Archival Resource Key	ark:/13960/t4sj6d431
Language	English
Publisher Date	1992-01-14
Access Restriction	Open
Subject Keyword	Metals And Metallic Materials Patents Directional Solidification Crystals Microstructure Electric Fields Alloys Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Patent

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