Metallurgical Transactions A

, Volume 15, Issue 6, pp 1129–1136

The Structure of Extruded NiAl


  • I. Baker
    • Thayer School of EngineeringDartmouth College
  • E. M. Schulson
    • Thayer School of EngineeringDartmouth College
Alloy Phases and Structure

DOI: 10.1007/BF02644707

Cite this article as:
Baker, I. & Schulson, E.M. MTA (1984) 15: 1129. doi:10.1007/BF02644707


The deformation structure of Ni-rich NiAl extruded at 550°C has been characterized by transmission electron microscopy and by optical microscopy. Dislocations having a«100» Burgers vectors were found as complex networks, tangles, and prismatic loops. a«110» dislocations which were rare, were concluded to arise from reactions of a«100» dislocations. Evidence of recovery and recrystallization was obtained. Extrusion was deemed to have been possible by the operation ofhk0 «001» slip systems (often in plane strain flow) plus diffusion-assisted processes.

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© The Metallurgical of Society of AIME 1984