On phenomenon of superplasticity in Fe{sub 3}Al with large grains

Book · Tue Aug 01 04:00:00 EDT 1995

OSTI ID:78310

Shan, A; Lin, D ^[1]

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1. Shanghai Jiao Tong Univ. (China). Dept. of Materials Science and Engineering

A variety of Fe{sub 3}Al alloys including Fe-25Al, Fe-28Al, Fe-28Al-4Cr and Fe-28Al-2Ti (all in atomic percent) have been investigated by tensile test to find if these alloys could have superplasticity at elevated temperatures. The results revealed that all these alloys exhibited large elongations when the temperature is higher than 600 C. At 850 C, under appropriate initial strain rate, the elongation is all above 300%. For Fe-28Al-2Ti, the maximum elongation reached 585%. Maximum m values are all above 0.3. Initial grain sizes are bigger than 100 {mu}m but became finer after deformation. Fracture happened with necking but no cavities were found under optical microscope. Characteristics of this phenomenon were summarized and discussed.

• OSTI ID: 78310
• Report Number(s): CONF-941144--; ISBN 1-55899-265-0
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
CHROMIUM ALLOYS
ELONGATION
EXPERIMENTAL DATA
FRACTURE PROPERTIES
GRAIN SIZE
INTERMETALLIC COMPOUNDS
IRON BASE ALLOYS
PLASTICITY
TEMPERATURE RANGE 1000-4000 K
TITANIUM ALLOYS