Yield point phenomena and serrated yielding in Nb-40Ti-15Al

Book · Tue Dec 30 23:00:00 EST 1997

OSTI ID:571893

Perungulam, S; Wheeler, R; Grylls, J; Fraser, H L ^[1]; Hou, D H ^[2]; Banerjee, S ^[3]

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1. Ohio State Univ., Columbus, OH (United States). Dept. of Materials Science and Engineering
2. Micron Technology Inc., Boise, ID (United States)
3. Bhabba Atomic Research Centre, Bombay (India). Materials Group

The ternary Nb-40Ti-15Al (at.%) intermetallic has an ordered B2-type crystal structure and shows appreciable ductility. Deformation is mainly accommodated in slip bands by the glide of b = 1/2<111> dislocations on {l_brace}110{r_brace} planes. The tensile behavior of this material has been studied at room temperature and at intermediate temperatures. Static and dynamic strain aging have been observed in certain temperature regimes. A model based on dislocation pinning by precipitates is proposed to explain the serrations observed during dynamic strain aging.

• Sponsoring Organization: Office of Naval Research, Washington, DC (United States)
• OSTI ID: 571893
• Report Number(s): CONF-961202--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
DISLOCATION PINNING
EXPERIMENTAL DATA
INTERMETALLIC COMPOUNDS
MICROSTRUCTURE
NIOBIUM ALLOYS
SLIP
STRAIN AGING
TENSILE PROPERTIES
TITANIUM ALLOYS