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- W3036223208 abstract "The improved resolution of the latest generation of intermediate voltage electron microscopes makes possible the direct study of the atomic structure of defects in close-packed metals and alloys. Of particular technological interest are several classes of intermetallic compounds which exhibit desirable mechanical properties at higher temperatures. This paper demonstrates the current application of high resolution transmission electron microscopy (HRTEM) to the study of dislocation cores and interfaces in nickel-based alloys, and the implications of the observations in terms of models of deformation and fracture. Several intermetallic alloys with the L1 2 (Cu 3 Au) structure exhibit an anomalous increase in the flow stress as a function of temperature. The theoretical models that have been proposed to explain this behavior are based upon consideration of a thermally activated cross slip of screw dislocations from {111} to {010}. These models assume that the dissociation of the a superlattice (SL) dislocation occurs by the formation of an anti-phase boundary (ABP) which is bounded by two a/2 superpartial (SP) dislocations with parallel Burgers vectors." @default.
- W3036223208 created "2020-06-25" @default.
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- W3036223208 date "1989-08-06" @default.
- W3036223208 modified "2023-09-27" @default.
- W3036223208 title "High-resolution Electron Microscopy of defects in Ni3Al" @default.
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- W3036223208 doi "https://doi.org/10.1017/s0424820100153488" @default.
- W3036223208 hasPublicationYear "1989" @default.
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