Comparison of two recent approaches to DTB characterization of ferritic steels
2023
Аутори
Đorđević, BranislavMastilović, Sreten
Sedmak, Aleksandar
Dimić, Aleksandar
Sedmak, Simon
Aranđelović, Mihajlo
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The large scatter of the experimental fracture toughness data, characteristic of all ferritic steels in the ductile-to-brittle transition temperature region, imposed the need to include statistical methods for data processing. Due to the inherent stochasticity, the application of fracture mechanics concepts in the characterization of the DTB transition phenomenon has remained a challenging task over the past 50 years. Various models were developed based on statistical approach to data processing in order to capture the salient features of the phenomenon, but all of them have certain limitations because of the intrinsic complexity of the problem. However, all these models provided a solid basis for the continued development of new approaches in the characterization of DTB. Such two novel models are compared herein. They include size effects and utilize scaling of geometrically similar C(T) specimens, with the aim of obtaining predictions of the fracture toughness. Both proposed models h...ave the weakest link statistics in common. In the present study, the EURO fracture toughness data set for 22NiMoCr37 reactor steel is used and the experimental data obtained at temperature of -60 °C is selected to demonstrate the accuracy of the estimates. The fracture toughness measure used is the critical value of the stress intensity factor used in the master curve KJc [MPa√m]. The obtained predictions are in good agreement with the experimental results, taking into account the inherent scatter of the experimental data. The estimate of KJc cumulative distribution function obtained by extrapolation using the novel two-step-scaling method is sensitive to the statistical size of the input data sets.
Кључне речи:
Ductile-to-brittle transition / Fracture toughness / Ferritic steels / Statistical processingИзвор:
27th International Conference on Fracture and Structural Integrity (IGF27), 2023, 47, 589-596Издавач:
- Elsevier B.V.
URI
https://www.sciencedirect.com/journal/procedia-structural-integrity/vol/47/suppl/Chttps://machinery.mas.bg.ac.rs/handle/123456789/7100
Колекције
Институција/група
Inovacioni centarTY - CONF AU - Đorđević, Branislav AU - Mastilović, Sreten AU - Sedmak, Aleksandar AU - Dimić, Aleksandar AU - Sedmak, Simon AU - Aranđelović, Mihajlo PY - 2023 UR - https://www.sciencedirect.com/journal/procedia-structural-integrity/vol/47/suppl/C UR - https://machinery.mas.bg.ac.rs/handle/123456789/7100 AB - The large scatter of the experimental fracture toughness data, characteristic of all ferritic steels in the ductile-to-brittle transition temperature region, imposed the need to include statistical methods for data processing. Due to the inherent stochasticity, the application of fracture mechanics concepts in the characterization of the DTB transition phenomenon has remained a challenging task over the past 50 years. Various models were developed based on statistical approach to data processing in order to capture the salient features of the phenomenon, but all of them have certain limitations because of the intrinsic complexity of the problem. However, all these models provided a solid basis for the continued development of new approaches in the characterization of DTB. Such two novel models are compared herein. They include size effects and utilize scaling of geometrically similar C(T) specimens, with the aim of obtaining predictions of the fracture toughness. Both proposed models have the weakest link statistics in common. In the present study, the EURO fracture toughness data set for 22NiMoCr37 reactor steel is used and the experimental data obtained at temperature of -60 °C is selected to demonstrate the accuracy of the estimates. The fracture toughness measure used is the critical value of the stress intensity factor used in the master curve KJc [MPa√m]. The obtained predictions are in good agreement with the experimental results, taking into account the inherent scatter of the experimental data. The estimate of KJc cumulative distribution function obtained by extrapolation using the novel two-step-scaling method is sensitive to the statistical size of the input data sets. PB - Elsevier B.V. C3 - 27th International Conference on Fracture and Structural Integrity (IGF27) T1 - Comparison of two recent approaches to DTB characterization of ferritic steels EP - 596 SP - 589 VL - 47 DO - 10.1016/j.prostr.2023.07.065 ER -
@conference{ author = "Đorđević, Branislav and Mastilović, Sreten and Sedmak, Aleksandar and Dimić, Aleksandar and Sedmak, Simon and Aranđelović, Mihajlo", year = "2023", abstract = "The large scatter of the experimental fracture toughness data, characteristic of all ferritic steels in the ductile-to-brittle transition temperature region, imposed the need to include statistical methods for data processing. Due to the inherent stochasticity, the application of fracture mechanics concepts in the characterization of the DTB transition phenomenon has remained a challenging task over the past 50 years. Various models were developed based on statistical approach to data processing in order to capture the salient features of the phenomenon, but all of them have certain limitations because of the intrinsic complexity of the problem. However, all these models provided a solid basis for the continued development of new approaches in the characterization of DTB. Such two novel models are compared herein. They include size effects and utilize scaling of geometrically similar C(T) specimens, with the aim of obtaining predictions of the fracture toughness. Both proposed models have the weakest link statistics in common. In the present study, the EURO fracture toughness data set for 22NiMoCr37 reactor steel is used and the experimental data obtained at temperature of -60 °C is selected to demonstrate the accuracy of the estimates. The fracture toughness measure used is the critical value of the stress intensity factor used in the master curve KJc [MPa√m]. The obtained predictions are in good agreement with the experimental results, taking into account the inherent scatter of the experimental data. The estimate of KJc cumulative distribution function obtained by extrapolation using the novel two-step-scaling method is sensitive to the statistical size of the input data sets.", publisher = "Elsevier B.V.", journal = "27th International Conference on Fracture and Structural Integrity (IGF27)", title = "Comparison of two recent approaches to DTB characterization of ferritic steels", pages = "596-589", volume = "47", doi = "10.1016/j.prostr.2023.07.065" }
Đorđević, B., Mastilović, S., Sedmak, A., Dimić, A., Sedmak, S.,& Aranđelović, M.. (2023). Comparison of two recent approaches to DTB characterization of ferritic steels. in 27th International Conference on Fracture and Structural Integrity (IGF27) Elsevier B.V.., 47, 589-596. https://doi.org/10.1016/j.prostr.2023.07.065
Đorđević B, Mastilović S, Sedmak A, Dimić A, Sedmak S, Aranđelović M. Comparison of two recent approaches to DTB characterization of ferritic steels. in 27th International Conference on Fracture and Structural Integrity (IGF27). 2023;47:589-596. doi:10.1016/j.prostr.2023.07.065 .
Đorđević, Branislav, Mastilović, Sreten, Sedmak, Aleksandar, Dimić, Aleksandar, Sedmak, Simon, Aranđelović, Mihajlo, "Comparison of two recent approaches to DTB characterization of ferritic steels" in 27th International Conference on Fracture and Structural Integrity (IGF27), 47 (2023):589-596, https://doi.org/10.1016/j.prostr.2023.07.065 . .