Observation of l angle 001 r angle dislocations and mechanism for transgranular fracture on l brace 001 r brace in FeAl

Journal Article · Wed May 01 04:00:00 EDT 1991 · Acta Metallurgica; (United States)

OSTI ID:7280277

Monroe, P R; Baker, I ^[1]

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1. Thayer School of Engineering, Dartmouth College, Hanover, NH (US)

This paper reports that transmission electron microscopy of iron-rich, B2-structured, FeAl alloys which had been compressed at room temperature revealed the presence of (001) dislocations, in addition to APB-coupled (111) dislocations which are normally observed at room temperature. It appears that the (001) dislocations form through the interaction of the (111) dislocations. This reaction to produce (001) dislocations is outlined and shown to be energetically favorable. The production of these (001) dislocations on (100) planes is suggested to be a cause of transgranular cleavage on (100) in B2 alloys deforming by (111) slip.

• OSTI ID: 7280277
• Journal Information: Acta Metallurgica; (United States), Journal Name: Acta Metallurgica; (United States) Vol. 39:5; ISSN 0001-6160; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
CLEAVAGE
COMPRESSION
CRYSTAL DEFECTS
CRYSTAL FACES
CRYSTAL STRUCTURE
DISLOCATIONS
ELECTRON MICROSCOPY
FAILURES
FRACTURES
IRON ALLOYS
LINE DEFECTS
MICROSCOPY
MICROSTRUCTURE
SLIP
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY