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invar

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.02 sec.

Invar

Trademark name for an alloy of iron (64% iron, 36% nickel) that expands very little when heated. Invar was formerly used for absolute standards of length measurement and is now used for surveying tapes and in watches and various other temperature-sensitive devices. The name expresses the invariability of its dimensions. It was developed by Charles-Édouard Guillaume (1861–1938), winner of the 1920 Nobel Prize for Physics.


invar [′in‚vär]
(materials)
An alloy (64% iron-36% nickel) that exhibits almost no thermal expansion over the temperature range of -50 to 150°C (-58 to 302°F).


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Initially it was proposed that SPARTA use the process deployed to make the hood for the 2004 Commemorative Edition 206 Corvette: laying up unidirectional prepreg tape on an Invar alloy mold, then curing it in an autoclave (see: http://www.
The hood is believed to be the highest production volume of a single carbon-fiber component using aerospace technology and is also the first use of Invar nickel/iron alloy tooling for an automotive production part.
The LVDTs were fixed to the top plates while both the LVDT cores were connected with Invar steel rods to the bottom plate.
 
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