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Energy-based method for analyzing fatigue properties of additively manufactured AlSi10Mg

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Abstract

This study focuses on analyzing the thermal response induced by the self-heating effect during cyclic loading of additively manufactured (AM) specimens made from AlSi10Mg aluminum alloy and on its correlation with their fatigue life performance. Four different specimen designs were tested to assess the applicability of various thermographic methods for predicting the fatigue response. These methods focus on estimating the fatigue limit (the Luong method and its versions) or the S-N curve (the Fargione method) from the temperature response of one specimen which is loaded on multiple subsequently increasing levels of the stress amplitude. Such methods could reduce the costs of fatigue experiments by speeding up the estimation of fatigue life performance. The analyses documented in this paper show their large potential (above all in the case of the Fargione method), but also their weaknesses and the need for a more rigorous and broader validation on new experimental data.

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Abbreviations

Φ :

Limiting energy

ΔT :

Stabilized temperature increase

R o :

Initial temperature rate

R Y :

Ending temperature rate

N f :

Number of cycles to failure

σ a :

Amplitude of stress

σ FL :

Fatigue limit

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Acknowledgments

The support of The Bavarian-Czech Academic Agency (BTHA-JC-2022-30 project), ESIF, EU Operational Programme Research, Development and Education, from the Center of Advanced Aerospace Technology (CZ.02.1.01/0.0/0.0/16_019/0000826), Faculty of Mechanical Engineering, Czech Technical University in Prague is appreciated and Grant Agency of the Czech Technical University in Prague, under grant No. SGS20/158/OHK2/3T/12. Jan Papuga thanks for the financial support of European Social Fund, grant “Mobility CTU—STA” CZ.02.2.69/0.0/0.0/18_053/0016980.

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, Czech Technical University in Prague, Technická 4, Praha 6, Czech Republic

    Martin Matušů, Jan Šimota, Jan Papuga, Vladimír Mára & Libor Beránek

  2. Department of Mechanical and Environmental Engineering, OTH Amberg-Weiden, Kaiser-Wilhelm-Ring 23, Amberg, 92224, Germany

    Katharina Dimke & Jakub Rosenthal

Authors
  1. Martin Matušů
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  2. Katharina Dimke
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  3. Jan Šimota
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  4. Jan Papuga
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  5. Jakub Rosenthal
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  6. Vladimír Mára
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  7. Libor Beránek
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Corresponding author

Correspondence to Martin Matušů.

Additional information

Martin Matušů is a Ph.D. student at the Czech Technical University in Prague (since 2019). He received a Master’s in Applied Mechanics. His research interest includes fatigue of additively manufacture metals, additive manufacturing in general, and infrared thermography.

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Matušů, M., Dimke, K., Šimota, J. et al. Energy-based method for analyzing fatigue properties of additively manufactured AlSi10Mg. J Mech Sci Technol 37, 1131–1137 (2023). https://doi.org/10.1007/s12206-022-2110-6

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  • DOI: https://doi.org/10.1007/s12206-022-2110-6

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