Plastic Strain Localization in Superalloy Single Crystals

Single crystals of a model Ni-base superalloy were heat treated so as to obtain two different gamma prime distributions; solutioned and quenched and fully aged. Surface replicas of slip occurring after small amounts of plastic deformation were analyzed using TEM techniques as a function of crystal o...

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Bibliographic Details
Main Authors: Anton,D L, Giamei,A F
Format: Report
Language:English
Subjects:
Localization
Mechanics
NICKEL ALLOYS
ORIENTATION(DIRECTION)
PE61102F
PLASTIC DEFORMATION
PLASTIC PROPERTIES
SINGLE CRYSTALS
Slip
STRAIN(MECHANICS)
SUPERALLOYS
WUAFOSR2306A1
Online Access:Request full text
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Description
Summary:Single crystals of a model Ni-base superalloy were heat treated so as to obtain two different gamma prime distributions; solutioned and quenched and fully aged. Surface replicas of slip occurring after small amounts of plastic deformation were analyzed using TEM techniques as a function of crystal orientation. Slip bands were clearly composed of a large number of fine slip lines. These slip lines were spaced approximately 50 nm apart. A model which describes the mechanism by which these slip lines spread and form slip bands is proposed and substantiated with TEM thin foil micrographs of the deformed alloy. (Author)