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Dislocation interaction with semicoherent precipitates (Ω phase) in deformed Al–Cu–Mg–Ag alloy

✍ Scribed by B.Q Li; F.E Wawner

Publisher
Elsevier Science
Year
1998
Tongue
English
Weight
720 KB
Volume
46
Category
Article
ISSN
1359-6454

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✦ Synopsis

AbstractÐThe interaction between dislocations and semicoherent precipitates (O phase) is discussed. The investigation shows that the semicoherent precipitate is cut by dislocations during deformation. Conventional TEM and HRTEM observations demonstrate that shearing of precipitates by dislocations occurs by multiple cutting of the precipitate. A strengthening mechanism is proposed based on this observation. The general theory is not only applicable to the O precipitate in Al±Cu±Mg±Ag alloys, but also to semicoherent precipitates in other alloys.

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