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Features of Dynamic Deformation and Failure of Aluminum Bronze Processed by Laser Surface Treatment

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Abstract

Dynamic tensile strength and ductility were studied within the range of strain rates from 0.6 to 1.2 × 103 s−1 by applying the split Hopkinson bar method on aluminum bronze samples the surface of which was processed by laser hardening and laser alloying. A number of effects are found: laser surface treatment of the samples significantly reduces the plastic properties of the material and increases the conditional yield stress, the tensile strength values of processed and unprocessed samples are close to each other, oscillations of the yield stress are observed, which can be interpreted as a "yield tooth" phenomenon. Deformation mechanisms explaining these effects were proposed based on the structural heterogeneity of the hardened surface layer and the sample as a whole.

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Acknowledgements

The dynamic experiments were supported by the Ministry of Science and Higher Education of the Russian Federation (task 0729-2020-0054). The investigation of mechanical properties of bronze after laser processing was carried out with the financial support of the Russian Science Foundation (Grant 21-19-00283).

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Authors and Affiliations

  1. National Research Lobachevsky State University of Nizhny Novgorod, Nizhny Novgorod, Russia, 603950

    A. M. Bragov, A. Yu. Konstantinov & A. K. Lomunov

  2. Mechanical Engineering Research Institute of RAS, Moscow, Russia, 101990

    V. V. Stolyarov

  3. Machine Building Plant «Armalit», Saint Petersburg, Russia, 198097

    A. V. Kuznetsov & M. S. Smakovsky

  4. St. Petersburg State Technological Institute (Technical University), Saint Petersburg, Russia, 198013

    G. G. Savenkov

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  1. A. M. Bragov
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  2. A. Yu. Konstantinov
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  3. A. K. Lomunov
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  4. V. V. Stolyarov
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  5. A. V. Kuznetsov
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  6. M. S. Smakovsky
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  7. G. G. Savenkov
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Correspondence to A. K. Lomunov.

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Bragov, A.M., Konstantinov, A.Y., Lomunov, A.K. et al. Features of Dynamic Deformation and Failure of Aluminum Bronze Processed by Laser Surface Treatment. J. dynamic behavior mater. 8, 122–136 (2022). https://doi.org/10.1007/s40870-021-00326-3

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  • DOI: https://doi.org/10.1007/s40870-021-00326-3

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