The influence of environment on fatigue crack growth of an Fe sub 3 Al, Cr alloy

Journal Article · Fri Feb 14 23:00:00 EST 1992 · Scripta Metallurgica; (United States)

OSTI ID:5634682

Castagna, A; Stoloff, N S ^[1]

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1. Rensselaer Polytechnic Inst., Troy, NY (US)

Iron aluminides are currently being studied for use in applications where their low cost, relatively low weight, and excellent resistance are desired. The main disadvantage of the alloys is low room temperature ductility in air due to moisture which causes hydrogen embrittlement (1-2). This paper examines changes in fatigue crack growth resistance of an Fe{sub 3}Al type intermetallic compound in various test environments. The alloys was studied in two ordered states, the DO{sub 3} and the B2, both of which are BCC type structures composed of interpenetrating cubic lattices. The DO{sub 3} is a highly ordered superlattice, while the B2 is a superlattice of imperfect order.

• OSTI ID: 5634682
• Journal Information: Scripta Metallurgica; (United States), Journal Name: Scripta Metallurgica; (United States) Vol. 26:4; ISSN 0036-9748; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
BCC LATTICES
CORROSION FATIGUE
CORROSION RESISTANCE
CRACK PROPAGATION
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUBIC LATTICES
DUCTILITY
EMBRITTLEMENT
FATIGUE
HYDROGEN EMBRITTLEMENT
INTERMETALLIC COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICAL PROPERTIES
MOISTURE
ORDER-DISORDER TRANSFORMATIONS
PERFORMANCE TESTING
PHASE TRANSFORMATIONS
SUPERLATTICES
TENSILE PROPERTIES
TESTING