 | | Mechanics of Solids
A Journal of Russian Academy of Sciences | | Founded
in January 1966
Issued 6 times a year
Print ISSN 0025-6544
Online ISSN 1934-7936 |
Archive of Issues
| Total articles in the database: | | 13025 |
| In Russian (Èçâ. ÐÀÍ. ÌÒÒ): | | 8110
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| In English (Mech. Solids): | | 4915 |
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| A.I. Epishin, I.N. Odintsev, D.S. Lisovenko, N.V. Petrushin, and I.L. Svetlov, "Measurement of Elastic Characteristics of Single-Crystals of a Nickel-Base Superalloy by Speckle Interferometry," Mech. Solids. 59 (6), 3397-3407 (2024) |
| Year |
2024 |
Volume |
59 |
Number |
6 |
Pages |
3397-3407 |
| DOI |
10.1134/S0025654424605718 |
| Title |
Measurement of Elastic Characteristics of Single-Crystals of a Nickel-Base Superalloy by Speckle Interferometry |
| Author(s) |
A.I. Epishin (Merzhanov Institute of Structural Macrokinetics and Materials Science RAS, Chernogolovka, Moscow Region, 142432 Russia, a.epishin2021@gmail.com)
I.N. Odintsev (Mechanical Engineering Research Institute RAS, Moscow, 101990 Russia)
D.S. Lisovenko (Ishlinsky Institute for Problems in Mechanics RAS, Moscow, 119526 Russia, lisovenk@ipmnet.ru)
N.V. Petrushin (Kurchatov Institute, All-Russin Research Institute of Aviation Materials (VIAM), Moscow, 105275 Russia)
I.L. Svetlov (Kurchatov Institute, All-Russin Research Institute of Aviation Materials (VIAM), Moscow, 105275 Russia) |
| Abstract |
The elastic properties of single crystals of nickel-base superalloy VGM7 have been investigated by speckle interferometry. Plate-shaped specimens of different crystallographic orientations were loaded under pure shear conditions and speckle interference patterns from the deformed specimens were imaged. Numerical processing of these interference patterns allowed us to determine the values of Young’s modulus in directions [001] and [011], E001=138 GPa and E011= 241 GPa, the basic value of Poisson’s ratio, ν0=0.39, in the coordinate system <001>, as well as its minimum and maximum values, νmin=−0.10 and νmax=0.69, under longitudinal loading along [101] when the specimen transversely deforms along [101] and [010], respectively. Using the measured values E001, E011, ν0, νmin, and νmax the single-crystal elastic stiffnesses, C11=264 GPa, C12=166 GPa, and C44=133 GPa, and the elastic compliances, S11=7.35 TPa−1, S12=−2.84 TPa−1, and S44=7.52 TPa−1, were calculated. The applied method allows one to unambiguously determine the sign of Poisson’s ratio and, therefore, it should be recommended for studying the elastic properties of auxetic materials, for which determination of the sign of Poisson’s ratio is of great importance. |
| Keywords |
nickel-base superalloys, cubic crystals, elastic constants, Poisson’s ratio, speckle interferometry |
| Received |
02 September 2024 | Revised |
22 September 2024 | Accepted |
24 September 2024 |
| Link to Fulltext |
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