Synthesis, characterization and mechanical properties of nanocrystalline NiAl

Conference · Fri Nov 01 00:00:00 EST 1996

OSTI ID:446025

Choudry, M ^[1]; Eastman, J A; DiMelfi, R J ^[2]; Dollar, M ^[1]

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1. Illinois Inst. of Tech., Chicago, IL (United States). Dept. of Mechanical, Materials and Aerospace Engineering
2. Argonne National Lab., IL (United States)

Nanocrystalline NiAl was produced from pre-cast alloys using an electron beam inert gas condensation system. In-situ compaction was carried out at 100-300 C under vacuum conditions. Energy dispersive spectroscopy was used to determine chemical composition and homogeneity. Average grain sizes in the range 4-10 nm were found from TEM dark field analyses. A compression-cage fixture was designed to perform disk bend tests. These tests revealed substantial room temperature ductility in nanocrystalline NiAl, while coarse grained NiAl showed no measurable room temperature ductility.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States); Department of Defense, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 446025
• Report Number(s): ANL/MSD/CP-91826; CONF-961202-32; ON: DE97001967; CNN: Grant FY9620-92-J
• Resource Relation: Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: Nov 1996
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
NICKEL ALLOYS
ALUMINIUM ALLOYS
POWDERS
DUCTILITY