Formation mechanisms of SISF-bounding dislocations in cold-rolled Ni3Al

A. Chiba, S. Hanada

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


The dislocation structure in Ni3Al lightly deformed by cold-rolling consists of long straight dislocations parallel to the ⟨101⟩ direction; the dislocations are mostly dissociated into a/2⟨110⟩ super partials bounding the antiphase boundary (APB) and partly dissociated into a/3⟨113⟩ super Shockley partials bounding the superlattice intrinsic stacking fault (SISF). It is substantiated by the present study that in cold-rolled polycrystalline Ni3Al, SISF-bounding dislocations are produced as a result of the interaction between APB-bounding dislocations gliding on the different (111) slip planes, as originally proposed by Kear et al. The relation between ductilization and changes in dissociation schemes due to variation in ordering energy is discussed.

Original languageEnglish
Pages (from-to)751-765
Number of pages15
JournalPhilosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties
Issue number4
Publication statusPublished - 1994 Apr


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