Inhomogeneous deformation of nickel-base superalloy 〈111〉 monocrystals under compression

Symmetrically oriented nickel-base superalloy monocrystals separated into blocky deformation regions when copmpressed at temperatures below about 800°C. In the case of compression along a 〈111〉 direction, plastic deformation always initiated at two corners of the sample, one at each compression face...

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Bibliographic Details
Published in:Materials science and engineering 1977, Vol.29 (1), p.29-35
Main Authors: Law, C.C., Giamei, A.F., Karg, A.V.
Format: Article
Language:English
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Summary:Symmetrically oriented nickel-base superalloy monocrystals separated into blocky deformation regions when copmpressed at temperatures below about 800°C. In the case of compression along a 〈111〉 direction, plastic deformation always initiated at two corners of the sample, one at each compression face, and these are related by a center of inversion. This phenomenon was analyzed in terms of the perturbing influence of the frictional shear stresses on the local resolved shear stresses of the potential slip systems. The analysis correctly predicts the location of initial deformation as well as the active slip systems. It is inferred that the susceptibility to frictional effects is related to the intrinsic deformation behaviors of the materials.
ISSN:0025-5416
DOI:10.1016/0025-5416(77)90142-2