Structure and mechanical properties of an [Ni.sub.3]Al single crystal upon high-temperature deformation

Structure and strength properties of single-crystal (001) samples of [Ni.sub.3]Al have been studied in the as-grown and homogenized state during tensile tests in the temperature range of 1150-1250[degrees]C. At the strain rate of 1.32 mm/min (2 x [10.sup.-5] m/s), the samples are in the state of sup...

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Published inPhysics of metals and metallography Vol. 111; no. 4; p. 403
Main Authors Stepanova, N.N, Davydov, D.I, Rodionov, D.P, Philippov, Yu. I, Akshentsev, Yu. N, Vinogradova, N.I, Kazantseva, N.V
Format Journal Article
LanguageEnglish
Published Springer 01.04.2011
Subjects
Alloys
Analysis
Intermetallic compounds
Mechanical properties
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Summary:Structure and strength properties of single-crystal (001) samples of [Ni.sub.3]Al have been studied in the as-grown and homogenized state during tensile tests in the temperature range of 1150-1250[degrees]C. At the strain rate of 1.32 mm/min (2 x [10.sup.-5] m/s), the samples are in the state of superplasticity. The basic mechanism of relaxation is dynamic recovery; in some regions of the sample, recrystallized grains are formed. At 1250[degrees]C, coarse twins are observed in the zone of fracture, which indicates the "switching on" of additional slip systems necessary to guarantee the relaxation process. Keywords: single crystal, superplasticity, [Ni.sub.3]Al, deformation, mechanical properties DOI: 10.1134/S0031918X1006102X
ISSN:0031-918X
1555-6190
DOI:10.1134/S0031918X1006102X