PSI - Issue 57

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000 – 000

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ScienceDirect

Procedia Structural Integrity 57 (2024) 762–771

© 2024 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 Fatigue Design 2023 organizers This paper investigates the effect of strain rate on the properties of Alloy 617 under low-cycle fatigue (LCF) in room temperature (RT). The LCF life properties and the damage mechanism are studied for this Alloy over a range of strain rate (5E-4 ~ 1E-2 s -1 ) under fully-reversed controlled total strain range of 1.2%. It is found that LCF life of Alloy 617 is strongly influenced by the time-dependent mechanism, in terms of slow strain rate test (SSRT). The relationship between total strain, plastic strain, and time to failure with strain rates are established and expressed by means of power law function to describe the fatigue life. Metallography examination is carried out on the fractured specimens with the help of electron microscope and the fractography is discussed to distinguish the effect of SSRT on the physical damage characteristic under LCF loadings. © 2023 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 Fatigue Design 2023 organizers Fatigue Design 2023 (FatDes 2023) Cyclic strain rate dependent behaviour of Alloy 617 Rando Tungga Dewa a, *, Miloslav Kepka b , Seon-Jin Kim c a Department of Mechanical Engineering,Republic of Indonesia Defense University, IPSC Area, Sentul, Bogor, West Java 16810, Indonesia b Regional Technological Institute, University of West Bohemia, 301 00 Plzeň 3, Czech Republic. c Department of Mechanical Design Engineering, Pukyong National University, Busan 48547, Republic of Korea Abstract This paper investigates the effect of strain rate on the properties of Alloy 617 under low-cycle fatigue (LCF) in room temperature (RT). The LCF life properties and the damage mechanism are studied for this Alloy over a range of strain rate (5E-4 ~ 1E-2 s -1 ) under fully-reversed controlled total strain range of 1.2%. It is found that LCF life of Alloy 617 is strongly influenced by the time-dependent mechanism, in terms of slow strain rate test (SSRT). The relationship between total strain, plastic strain, and time to failure with strain rates are established and expressed by means of power law function to describe the fatigue life. Metallography examination is carried out on the fractured specimens with the help of electron microscope and the fractography is discussed to distinguish the effect of SSRT on the physical damage characteristic under LCF loadings. © 2023 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 Fatigue Design 2023 organizers Fatigue Design 2023 (FatDes 2023) Cyclic strain rate dependent behaviour of Alloy 617 Rando Tungga Dewa a, *, Miloslav Kepka b , Seon-Jin Kim c a Department of Mechanical Engineering,Republic of Indonesia Defense University, IPSC Area, Sentul, Bogor, West Java 16810, Indonesia b Regional Technological Institute, University of West Bohemia, 301 00 Plzeň 3, Czech Republic. c Department of Mechanical Design Engineering, Pukyong National University, Busan 48547, Republic of Korea Abstract 1. Introduction One of the National Army’s ambition is to build defense independence in all sectors. This includes the maintenance, repair, and overhaul (MRO) system in Indonesian Air Force. Nickel-based superalloys have attracted attention in the defense industry. The aerospace ambitions of the belligerent parties and other military applications surrounding World War II were a driving force in its creation. Not to mention the fact that Indonesia is the world’s 1. Introduction One of the National Army’s ambition is to build defense independence in all sectors. This includes the maintenance, repair, and overhaul (MRO) system in Indonesian Air Force. Nickel-based superalloys have attracted attention in the defense industry. The aerospace ambitions of the belligerent parties and other military applications surrounding World War II were a driving force in its creation. Not to mention the fact that Indonesia is the world’s Keywords: Alloy 617; strain rate; low-cycle fatigue; SSRT Keywords: Alloy 617; strain rate; low-cycle fatigue; SSRT

* Corresponding author. Tel.: (+621)87951555. E-mail address: rando.td@gmail.com * Corresponding author. Tel.: (+621)87951555. E-mail address: rando.td@gmail.com

2452-3216 © 2023 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 Fatigue Design 2023 organizers 2452-3216 © 2023 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 Fatigue Design 2023 organizers

2452-3216 © 2024 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 Fatigue Design 2023 organizers 10.1016/j.prostr.2024.03.082