Phase transformations in nickel rich NiAl using electrical resistivity measurements

Journal Article · Mon Sep 15 04:00:00 EDT 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(97)00180-2· OSTI ID:540988

Lasek, J; Bartuska, P ^[1]; Chraska, T; Krecek, P ^[2]

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1. Academy of Sciences, Praha (Czech Republic). Inst. of Physics
2. Czech Technical Univ., Praha (Czech Republic). Faculty of Nuclear Science and Physical Engineering

The intermetallic phase NiAl is a perspective material for high-temperature and shape memory effect applications. This phase is stable in a wide composition range and shows thermoelastic martensitic transformations in a region supersaturated in nickel. It is known that formation of Ni{sub 5}Al{sub 3}, Ni{sub 2}Al, Ni{sub 3}Al phases influences the martensitic transformation and, consequently, the shape memory effect. The aim of this paper is to throw more light upon structure changes of the mentioned phases using resistivity measurements during heating and cooling of the nickel rich NiAl phase specimens within a relatively broad temperature region ({minus}180 C to 900 C). Identification of the phases was done using the Ni-Al phase diagram, their experience in SEM investigation of the structural changes in this system, and electrical properties of the phases.

• OSTI ID: 540988
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 6 Vol. 37; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
AUSTENITE
CHEMICAL COMPOSITION
CRYSTAL-PHASE TRANSFORMATIONS
ELECTRIC CONDUCTIVITY
INTERMETALLIC COMPOUNDS
MARTENSITE
NICKEL ALLOYS
PHASE STUDIES
TEMPERATURE DEPENDENCE