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) 690–699

© 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 investigation, estimation of fracture resistance from tensile properties of P91 steels was carried out. Tensile properties and J -R curves have been determined in the temperature range 300-550 °C. Modulus of toughness was determined from area under stress strain curves and the values were in the range 45-82 MJ.m -3 . Plastic component of strain energy density was estimated using strain hardening parameters. From J -R curves, J 1c values and tearing resistance were determined. J 1c values were in the range 190-290 kJ.m -2 . Equivalent linear elastic fracture parameter ( K j1c ) determined from J 1c values were in the range 190-240 MPa.m 0.5 . Estimation of fracture resistance ( K 1c ) was carried out from tensile properties and based on a previously proposed model. The estimated K 1c values were in the range 170-200 MPa.m 0.5 . Difference between estimated K 1c and determined fracture toughness was in the range 7 29%. Estimation of K 1c was also carried out for similar P91 steels and other grade (SA 333) steels. From estimated results, it is summarized that previous K 1c estimation model is applicable for P91 class of steels. © 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) Study on estimation of fracture resistance of P91 steels from tensile properties 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 investigation, estimation of fracture resistance from tensile properties of P91 steels was carried out. Tensile properties and J -R curves have been determined in the temperature range 300-550 °C. Modulus of toughness was determined from area under stress strain curves and the values were in the range 45-82 MJ.m -3 . Plastic component of strain energy density was estimated using strain hardening parameters. From J -R curves, J 1c values and tearing resistance were determined. J 1c values were in the range 190-290 kJ.m -2 . Equivalent linear elastic fracture parameter ( K j1c ) determined from J 1c values were in the range 190-240 MPa.m 0.5 . Estimation of fracture resistance ( K 1c ) was carried out from tensile properties and based on a previously proposed model. The estimated K 1c values were in the range 170-200 MPa.m 0.5 . Difference between estimated K 1c and determined fracture toughness was in the range 7 29%. Estimation of K 1c was also carried out for similar P91 steels and other grade (SA 333) steels. From estimated results, it is summarized that previous K 1c estimation model is applicable for P91 class of steels. Third International Conference on Structural Integrity 2023 (ICONS 2023) Study on estimation of fracture resistance of P91 steels from tensile properties 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; strain energy density; Modulus of toughness; 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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