PSI - Issue 33

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 33 (2021) 748–756

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo Abstract Traditional fatigue tests require a huge amount of time and specimens to derive the fatigue limit of the material. The adoption of Infrared Thermography (IR) has allowed the researchers to investigate in an innovative way the link between the material fatigue behaviour and its energetic release. Thermographic Method is a well-established rapid procedure to evaluate the fatigue limit during a fatigue tests with a stepwise increase of the stress amplitude. In the recent years, Risitano and Risitano proposed the Static Thermograhic Method as an innovative approach to assess the fatigue limit of the material evaluating the end of the thermoelastic phase during a static tensile test, adopting a very few numbers of specimens and in a short amount of time. In this work, the energetic release of a medium carbon C45 steel has been evaluated during fatigue and static tensile tests. The obtained value of the fatigue limit has been compared with several energetic methods showing good agreement. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo Keywords: energetic release; C45; Static Thermographic Method 1. Introduction Fatigue is a degradation process where a large amount of the provided external mechanical energy is dissipated as heat to the surrounding environment, while only a small portion is stored within the material and take part to microstructure damage. Since 1983, by observing the temperature evolution during a fatigue test, La Rosa and IGF26 - 26th International Conference on Fracture and Structural Integrity Rapid Energetic Approaches for the Fatigue Limit assessment in a medium carbon steel Giacomo Risitano*, Eugenio Guglielmino, Dario Santonocito University of Messina, Department of Engineering, C.da di Dio, 98166 Messina, ITALY

* Corresponding author. Tel.: +39 3473209239. E-mail address: giacomo.risitano@unime.it

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo 10.1016/j.prostr.2021.10.082