PSI - Issue 42

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 il l li i i t t l t it i

www.elsevier.com/locate/procedia . l i . /l t / i

ScienceDirect

Procedia Structural Integrity 42 (2022) 506–512

© 2022 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 23 European Conference on Fracture – ECF23 Abstract In this article, the effect of the impact pulse in dynamic fracture toughness tests with an instrumented pendulum impact test machine is investigated. Low-blow tests were carried out on Charpy specimens made from 42CrMo4 casting steel and nodular cast iron EN GJS-400-18 with different crack geometries at several impact velocities. Inertia effects that occur on the specimens and on the components of the pendulum impact test machine were identified with laser-based measurements of displacement and velocity. The dynamic fracture toughness tests showed an incomplete energy conversion, as part of the applied energy is absorbed by the components of the pendulum impact test machine. This can lead to an overestimation of the loading, in terms of the integral, on the specimen. © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 Keywords: Fracture toughness, impact testing, metallic materials 1. Introduction Due to the special requirements for components that experience sudden loading, characteristic properties must be considered in the design. For this purpose, corresponding dynamic test methods are required. This includes the dynamic crack resistance behavior or the dynamic fracture toughness. It can be determined by dynamic fracture toughness tests (Bhaduri (2018)). The prescriptive procedure is given in ASTM E 1820 (ASTM (2020)). At high , hine . . . oug , . , , . . . . This is an open access article under the CC BY-NC-ND license (http://creativ . . t t , i t t ti , t lli t i l 23rd European Conference on Fracture - ECF23 Effect of the impact pulse on the dynamic fracture toughness behavior of high-strength steel and nodular cast iron K. Koch*, S. Henschel, L. Krüger Intitute of Materials Engineering, TU Bergakademie Freiberg, Gustav-Zeuner-Str. 5, 09599 Freiberg, Germany ength steel and nodular cast iron tit t f t i l i i , i i , t t . , rei ,

* Corresponding author. Tel.: +49 3731 39-3726; fax: +49 3731 39-3703. E-mail address: kevin.koch@iwt.tu-freiberg.de i t . l.: ; : . il i . i t.t i .

2452-3216 © 2020 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of 23 European Conference on Fracture - ECF23 l i . . i i ti l t li tt :// ti . /li / / . / t . li

2452-3216 © 2022 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 23 European Conference on Fracture – ECF23 10.1016/j.prostr.2022.12.064