PSI - Issue 16

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

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ScienceDirect

Procedia Structural Integrity 16 (2019) 126–133

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers The energy approach for determining the durability of structural elements at high temperature creep and hydrogen activity was proposed. It has been shown that the approach significantly simplifies research compared with the known ones. Approbation of th ppr ach was carried out on the exampl of determining the indicators of durability of the Bridgman sample under conditions of creep and different levels of hydrogenation of the metal. It was shown that with an increase of hydrogen concentration in the metal from 2 to 10 ppm, the durability of th test sample decreased from 22 to 58%. © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers The energy approach for determining the durability of structural elements at high temperature creep and hydrogen activity was proposed. It has been shown that the approach significantly simplifies research compared with the known ones. Approbation of the approach was carried out on the example of determining the indicators of durability of the Bridgman sample under conditions of creep and different levels of hydrogenation of the metal. It was shown that with an increase of hydrogen concentration in the metal from 2 to 10 ppm, the durability of the test sample decreased from 22 to 58%. Keywords: Hydrogen concentration, creep, strain energy, damage 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” The energy approach to the evaluation of hydrogen effect on the damage accumulation Yaroslav Ivanytskyi a,b , Yevhen Kharchenko a,c , Oksana Hembara a,b *, Olha Chepil a,b , Yaroslav Sapuzhak b , Nazar Hembara b a Lviv Polytechnic National University, 12, Stepan Bandera St., Lviv 79000, Ukraine b Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5, Naukova St., Lviv 79060, Ukraine c University of Warmia and Mazury in Olsztyn, 2, Michała Oczapowskiego St., Olsztyn, Poland 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” The energy approach to the valuation of hydrogen effect on the damage accumulation Yaroslav Ivanytskyi a,b , Yevhen Kharchenko a,c , Oksana Hembara a,b *, Olha Chepil a,b , Yaroslav Sapuzhak b , Nazar Hembara b a Lv v Polytechnic National Un versity, 12, Stepan Bandera St., Lviv 79000, Ukraine b Karpenko Physico-Mechanical Institute of the National Academy of Sciences of Ukraine, 5, Naukova St., Lviv 79060, Ukraine c University of Warmia and Mazury in Olsztyn, 2, Michała Oczapowskiego St., Olsztyn, Poland Abstract Abstract

Keywords: Hydrogen concentration, creep, strain energy, damage

* Corresponding author. E-mail address: hembara@ipm.lviv.ua * Corresponding author. E-mail address: hembara@ipm.lviv.ua

2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers 2452-3216 © 2019 The Author(s). Published by Elsevier B.V. Peer- review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the 6th International Conference “Fracture Mechanics of Materials and Structural Integrity” organizers. 10.1016/j.prostr.2019.07.031