Publication Date:
2019-07-13
Description:
Surface films deposited on body-centered cubic metals can greatly reduce the yield and flow stresses and increase the ductility at low homologous temperatures. This softening process is associated with the ability of the film-substrate interface to generate large populations of mobile edge dislocations. This phenomenon is extended to B2 ordered intermetallic alloys, which display many deformation characteristics of bcc metals. Single crystal NiAl coated with thermally formed oxide films and polycrystalline FeAl with electrochemically formed Fe-Al-O films display film softening at and below room temperature. The extent of film softening is shown to depend on many factors, including crystal orientation, deformation temperature, operative slip systems, film thickness, film adherence, and film and substrate properties.
Keywords:
METALLIC MATERIALS
Type:
Intl. Conference on Strength of Metals and Alloys (ICSMA 8); Aug 22, 1988 - Aug 26, 1988; Tampere; Finland
Format:
text
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