PSI - Issue 60

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Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com ScienceDirect StructuralIntegrity Procedia 00 (2023) 000 – 000

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Procedia Structural Integrity 60 (2024) 471–483

© 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 ICONS 2023 Organizers © 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 ICONS 2023 Organizers Abstract In this study, estimation of fracture resistance ( K 1c ) was carried out for SS 316 LN welds subjected to various aging conditions. The welds were aged at 370, 475 and 550 °C and for 1000-20,000 h durations and were tested at room temperature (RT), 380 and 550 °C. Tensile properties and J -R curves were established for SS 316 LN welds after aging treatments at all test temperatures. Decrease in total elongation was observed after 20,000 h aging durations for all aging temperatures and all test temperatures, compared to as weld condition. From J -R curves, J 1c values and equivalent K j1c values were determined. Decrease in J 1c was observed after 20,000 h aging durations for all aging temperatures at all test temperatures. Based on previously proposed model, an attempt was made to estimate fracture resistance ( K 1c ) from tensile properties. Estimation of K 1c was carried out for aged welds, including as weld condition at three temperatures. Estimated K 1c values were within 1-30 % of the determined fracture toughness values. K 1c estimation was also applied for similar type of austenitic stainless steel welds. It is summarized that previous methodology of K 1c estimation is applicable for austenitic stainless steel welds. © 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 ICONS 2023 Organizers Third International Conference on Structural Integrity 2023 (ICONS 2023) Investigation on estimation of fracture resistance of SS 316 LN welds subjected to various aging conditions and test temperatures B Shashank Dutt a *, M Nani Babu a , G Shanthi a , A Moitra a,b a Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India b Professor, Homi Bhaba National Institute, Kalpakkam, 603102, India Abstract In this study, estimation of fracture resistance ( K 1c ) was carried out for SS 316 LN welds subjected to various aging conditions. The welds were aged at 370, 475 and 550 °C and for 1000-20,000 h durations and were tested at room temperature (RT), 380 and 550 °C. Tensile properties and J -R curves were established for SS 316 LN welds after aging treatments at all test temperatures. Decrease in total elongation was observed after 20,000 h aging durations for all aging temperatures and all test temperatures, compared to as weld condition. From J -R curves, J 1c values and equivalent K j1c values were determined. Decrease in J 1c was observed after 20,000 h aging durations for all aging temperatures at all test temperatures. Based on previously proposed model, an attempt was made to estimate fracture resistance ( K 1c ) from tensile properties. Estimation of K 1c was carried out for aged welds, including as weld condition at three temperatures. Estimated K 1c values were within 1-30 % of the determined fracture toughness values. K 1c estimation was also applied for similar type of austenitic stainless steel welds. It is summarized that previous methodology of K 1c estimation is applicable for austenitic stainless steel welds. Third International Conference on Structural Integrity 2023 (ICONS 2023) Investigation on estimation of fracture resistance of SS 316 LN welds subjected to various aging conditions and test temperatures B Shashank Dutt a *, M Nani Babu a , G Shanthi a , A Moitra a,b a Metallurgy and Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, 603102, India b Professor, Homi Bhaba National Institute, Kalpakkam, 603102, India

Keywords: Tensile properties; Modulus of toughness; aging; fracture toughness

* Corresponding author. E-mail address: shashank@igcar.gov.in * Corresponding author. E-mail address: shashank@igcar.gov.in

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 ICONS 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 ICONS 2023 Organizers

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