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Original Articles

Analysis of in situ shearing mechanisms of γ′ precipitates in a nickel-based superalloy at 1120 K

, , , &
Pages 73-78 | Received 10 Oct 1990, Accepted 20 Nov 1990, Published online: 20 Aug 2006
 

Abstract

L12 precipitate shearing processes by (a/3)〈112〉 dislocations during in situ straining of a superalloy in a transmission electron microscope are reported. Information about the core structure of such dislocations is obtained from the way they split when they get out of a precipitate. We conclude that a further dissociation into two identical Shockley partials occurs.

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