Ductility and fracture of FeAl: Effects of composition and environment

Conference · Thu Jul 01 00:00:00 EDT 1999

OSTI ID:20001596

Cohron, J W; Lin, Y; Zee, R H; George, E P

In ultrahigh vacuum (UHV), the ductility of FeAl decreases with increasing Al content and fracture becomes increasingly intergranular. Boron improves ductility by segregating to the grain boundaries and suppressing grain-boundary fracture. However, with increasing Al concentration, even the B-doped alloys become brittle and fracture intergranularly. Hydrogen gas at low pressures embrittles FeAl, although not as severely as atmospheric moisture. Ductility is highest in UHV followed by that in O{sub 2}, vacuum, and air.

• Research Organization: Oak Ridge National Lab., TN (US)
• Sponsoring Organization: US Department of Energy
• DOE Contract Number: AC05-96OR22464
• OSTI ID: 20001596
• Report Number(s): CONF-981104--; ISBN 1-55899-458-0; ISSN 1067-9995
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
BORON ADDITIONS
DUCTILITY
EXPERIMENTAL DATA
FRACTURE PROPERTIES
HYDROGEN EMBRITTLEMENT
INTERMETALLIC COMPOUNDS
IRON ALLOYS
METALLURGICAL EFFECTS
STOICHIOMETRY