Powder processing of NiAl for elevated temperature strength

Book · Wed Dec 31 00:00:00 EST 1997

OSTI ID:571833

Whittenberger, J D; Hebsur, M ^[1]; Grahle, P; Arzt, E; Behr, R; Zoeltzer, K ^[2]

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1. NASA Lewis Research Center, Cleveland, OH (United States)
2. Max-Planck-Inst. fuer Metallfroschung, Stuttgart (Germany)

In an effort to superimpose two different elevated temperature strengthening mechanisms in NiAl, one lot of an oxide dispersion strengthened (ODS) NiAl powder has been milled in liquid nitrogen (cryomilled) to introduce AlN particles at the grain boundaries, and a second lot of ODS powder was simply roasted in gaseous nitrogen as an alternative means to produce AlN reinforced grain boundaries. Powder from both of these lots as well as the starting material have been consolidated by hot extrusion and tested at 1,300 K. Both nitrogen roasting and cryomilling produced AlN within the ODS NiAl matrix which strengthened the alloy; however, based on the AlN content, cryomilling is more effective.

• Sponsoring Organization: Alexander von Humboldt-Stiftung, Bonn (Germany)
• OSTI ID: 571833
• Report Number(s): CONF-961202-; TRN: IM9806%%110
• Resource Relation: Conference: 1996 Fall meeting of the Materials Research Society (MRS), Boston, MA (United States), 2-6 Dec 1996; Other Information: PBD: 1997; Related Information: Is Part Of High-temperature ordered intermetallic alloys VII; Koch, C.C. [ed.] [North Carolina State Univ., Raleigh, NC (United States)]; Liu, C.T. [ed.] [Oak Ridge National Lab., TN (United States)]; Stoloff, N.S. [ed.] [Rensselaer Polytechnic Inst., Troy, NY (United States)]; Wanner, A. [ed.] [Univ. Stuttgart (Germany)]; PB: 799 p.; Materials Research Society symposium proceedings, Volume 460
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
POWDER METALLURGY
NICKEL ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM NITRIDES
COMPRESSION STRENGTH
INTERMETALLIC COMPOUNDS
EXPERIMENTAL DATA
COMPOSITE MATERIALS