HIGH-RESOLUTION ELECTRON-MICROSCOPY OF A DEFORMED SUPERALLOY - SHEAR OF PRECIPITATES

Authors
GUETAZ L PENISSON JM
Citation
L. Guetaz et Jm. Penisson, HIGH-RESOLUTION ELECTRON-MICROSCOPY OF A DEFORMED SUPERALLOY - SHEAR OF PRECIPITATES, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 175(1-2), 1994, pp. 141-148
Citations number
13
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
175
Issue
1-2
Year of publication
1994
Pages
141 - 148
Database
ISI
SICI code
0921-5093(1994)175:1-2<141:HEOADS>2.0.ZU;2-U
Abstract
A two-phase nickel-cobalt superalloy deformed in tension at room tempe rature has been studied by high resolution electron microscopy (HREM). The alloy contains plate shaped precipitates which are sheared by the motion of dislocations during deformation. The matrix and precipitate s have different crystallographic structures; the deformation is not h omogeneous. Local deformations and rotations which appear near the she ar plane are analysed, and a microscopic description of the precipitat e shearing mechanism is proposed.