PSI - Issue 23

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

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ScienceDirect

Procedia Structural Integrity 23 (2019) 523–528

© 2019 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 the scientific committee of the ICMSMF organizers © 201 9 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 the scientific committee of the IC MSMF organizers. Strain controlled cyclic straining with con ant strain amplitu e and a single strain rate has been applied t cylindric l sp cime s of 713LC and R ne 41 superalloys and hystere is loops were ig tally rec rded. The hape of hyster sis lo ps wa an lyz d us ng the statistical theory of the hy teresis l op. First and second rivative of half-l ops were alcul ted. From these d ta effectiv elastic modulu , eff ctive str ss component and probability density distribution of inte nal critical stress s wer evaluated. The stress-strain response and its evolution have been discussed in relation to the internal structure and its development during cyclic plastic straining. © 201 9 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture Effective and internal stresses in 713LC and Rene 41 superalloys using analysis of the hysteresis loop shape Tomáš Babinský a,b* , Jaroslav Polák a,b a Institute of Physics of Materials, Žižkova 22, 61600 Brno, Czech Republic b CEITEC IPM, Institute of Physics of Materials, Žižkova 22, 61600 Brno, Czech R epublic 9th International Conference on Materials Structure and Micromechanics of Fracture Effective and internal stresses in 713LC and Rene 41 superalloys using analysis of the hysteresis loop shape Tomáš Babinský a,b* , Jaroslav Polák a,b a Institute of Physics of Materials, Žižkova 22, 61600 Brno, Czech Republic b CEITEC IPM, Institute of Physics of Materials, Žižkova 22, 61600 Brno, Czech R epublic Abstract Abstract Strain controlled cyclic straining with constant strain amplitude and a single strain rate has been applied to cylindrical specimens of 713LC and Rene 41 superalloys and hysteresis loops were digitally recorded. The shape of hysteresis loops was analyzed using the statistical theory of the hysteresis loop. First and second derivatives of half-loops were calculated. From these data effective elastic modulus, effective stress component and probability density distribution of internal critical stresses were evaluated. The stress-strain response and its evolution have been discussed in relation to the internal structure and its development during cyclic plastic straining. Keywords: IN713LC superalloy; Rene 41 superalloy; Hysteresis loop shape analysis; Statistical theory; Effective stress; Internal stress Keywords: IN713LC superalloy; Rene 41 superalloy; Hysteresis loop shape analysis; Statistical theory; Effective stress; Internal stress

1. Introduction 1. Introduction

Nickel-based superalloys are engineering materials commonly used in aeronautical and power generation industry due to their excellent corrosion resistance and high strength in homologous temperatures up to 0.75. That makes them an excellent choice for manufacturing parts, such as turbine blades in jet engines, which operate in a harsh, high- Nickel-based superalloys are ngineering materials commonly used in aeronautical and p wer generation industry due to their excellent corrosion resistance and hig strength in homologous t mperatures up to 0.75. Th t makes them an excellent choice for manufacturing parts, such as turbine blades in jet engines, which operate in a harsh, high-

* Corresponding author. Tel.: +420 532 290 345. E-mail address: babinsky@ipm.cz (T. Babinský) * Correspon ing author. Tel.: +420 532 290 345. E-mail address: babinsky@ipm.cz (T. Babinský)

2452-3216 © 2019 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 the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

2452-3216 © 2019 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 the scientific committee of the ICMSMF organizers 10.1016/j.prostr.2020.01.139