Denuded zones and diffusional creep

Journal Article · Wed Jun 15 00:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90302-6· OSTI ID:7303323

Greenwood, G W ^[1]

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1. Univ. of Sheffield (United Kingdom). Dept. of Materials Engineering

Numerous observations have followed the reporting of the absence of precipitates in zones adjacent to grain boundaries oriented approximately normal to the direction of elongation in materials subjected to low stresses at elevated temperatures. Such observations have usually been regarded as evidence that diffusional creep'' is then occurring by a process whereby atomic fluxes are created by the counter flow of vacancies between grain boundaries at different orientations. This view however has not gone unchallenged, and a recent publication has presented a detailed and critical review with the conclusion that any relationship between denuded zones and diffusional creep can be refuted. The present note puts forward some further points that are frequently overlooked in arguments of this kind and suggests some approaches that may be helpful in their resolution.

• OSTI ID: 7303323
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 30:12; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
360203 -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360603 -- Materials-- Properties
CREEP
GRAIN ORIENTATION
GRAIN SIZE
MATERIALS
MECHANICAL PROPERTIES
MICROSTRUCTURE
ORIENTATION
PRECIPITATION
SEPARATION PROCESSES
SIZE