Electron microscopic study of the high tension process of growth of decorated stacking faults in Ni base superalloys

Journal Article · Thu Apr 01 00:00:00 EST 1976 · Metallography; (United States)

DOI:https://doi.org/10.1016/0026-0800(76)90011-2· OSTI ID:7361744

Montheillet, F

Aspects of the growth of decorated stacking faults in a nickel base alloy are investigated by HVEM. The first stages of precipitation occur on perfect loops and that causes their dissociation into outer Frank and inner Shockley partials. Further expansion of Frank loops leads to two types of extrinsic decorated stacking faults. In the first type, the fault is covered with a thin homogeneous layer of precipitate and bounded by sessile dissociated Frank segments. The second type consists of small spherical precipitates spread on the faulted area; in this case, up-climb of the undissociated bounding Frank loop can occasionally be observed.

• Research Organization: Centre de Mise en frome des Materiaux, Paris
• OSTI ID: 7361744
• Journal Information: Metallography; (United States), Vol. 9:2
• Country of Publication: United States
• Language: French

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM ALLOYS
STACKING FAULTS
MOLYBDENUM ALLOYS
NICKEL BASE ALLOYS
TITANIUM ALLOYS
ELECTRON MICROSCOPY
LAYERS
PRECIPITATION HARDENING
QUATERNARY ALLOY SYSTEMS
SCREW DISLOCATIONS
ALLOY SYSTEMS
ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
HARDENING
LINE DEFECTS
MICROSCOPY
NICKEL ALLOYS
360102* - Metals & Alloys- Structure & Phase Studies