Acoustic Emission at the Kinetic and Development of the Structural Defects under Deformation of Aluminum Alloy

Abstract:

The paper presents the results of studies the deformation behavior of aluminium alloy D16 by acoustic emission (AE) method. The purpose of this study was to establish the deformation stages and deformation mechanisms at each stage. Studies were carried out on the samples of aluminum alloy D16 (analog 7075). This paper contains a method for the separation of AE signals. The method of AE sources identification based on the the two-parameter distribution analysis (frequency parameter K_fvs energy of AE signals). The frequency parameter Kf is based on wavelet transform of AE signals. Two-parameter distribution allows one to separate the AE signals emitted by dislocations from the signals of micro cracks. The investigation results allowed the various deformation stages to establish by the different types of AE signals. By the AE analysis shows the dislocation mechanism of hardening the aluminum alloyD16. The paper presents the results that characterize the influences of heat treatment and structural condition of aluminum alloy on the AE parameters.

• Periodical: Advanced Materials Research (Volume 1091)
• Pages: 119-124
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1091.119
• Online since: February 2015
• Authors: Oleg Bashkov*, Roman Romashko, Sergey Panin, Tatiana I. Bashkova
• Keywords: Acoustic Emission, AE Sources, Dislocations, Macrocrack, Microcrack, Stage, Stress

References

[1] R. Hertzberg. Deformation and Fracture Mechanics of Engineering Materials (John Wiley & Sons, 1983).

[2] A.H. Cottrell. Vacancies and Other Point Defects in Metals and Alloys(LondonInst. of Met.: 1-40, 1958).

[3] Y.I. Golovin, and V.I. Ivolgin: Solid State Physics. Vol. 46 (2004)1618-1620.

[4] J.F. Bell. ExperimentalFoundations of Mechanicsof Deformable Solids. Part 2 (Moscow, Nauka, 1984, in Russ. ).

[5] G.B. Muravin, Y.V. Simkin, and A.I. Merman: Defectoscopia. Vol. 4 (1989)9-15.

[6] A.P. Braginsky: Defectoscopia. Vol. 1 (1984)47-55.

[7] A. Bragin, B.M. Medvedev, and A.I. Platkov: Defectoscopia. Vol. 8 (1988)58-65.

[8] M.A. Hamstad, A.O. Gallagher, and J. Gary: J. Acoustic Emission. Vol. 20 (2002) 39-61.

[9] O.V. Bashkov, S.V. Panin, N.A. Semashko, et al.: Zavodskaja Laboratoryja. Diagnostika Materialov (Factory Laboratory. Materials Diagnostics), Vol. 10 (2009) 51-57.

[10] O.V. Bashkov, S.V. Panin, and A.V. Byakov: Physical Mesomechanics. Vol. 13(2010)53-72.

[11] O. V. Bashkov, T.I. Bashkova, and A. Popkova: Stages of bending fatigue of titanium alloys and their identification by acoustic emission. In 30th European Conference on Acoustic Emission Testing & 7th International Conference on Acoustic Emission"(University of Granada, ISBN13: 978-84-615-9941-7, 2012).

DOI: 10.1007/978-1-4939-1239-1_26

[12] V.A. Krasil'nikov, and V.V. Krylov. Introduction to Physical Acoustics(Moscow, Nauka, 1984, in Russ. ).

[13] J. Radon: Physical Mesomechanics. Vol. 3(2000) 81-89.

[14] A.G. Penquin, V.F. Terent'ev: Metals. Vol. 3 (2004) 78-85.