Research of fracture mechanism of steel grade P91 on impact bending after preheat treatment before welding
The influence of modes of preliminary heat treatment (HT) of P91 steel on crack formation during impact bending test has been investigated. Curves of dependence of force variation in time and specimen deflection variation depending on the force have been experimentally obtained, by which the followi...
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Belarusian National Technical University
2025-01-01
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| Series: | Литьë и металлургия |
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| Online Access: | https://lim.bntu.by/jour/article/view/3745 |
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| author | F. I. Panteleenko V. A. Zelenin A. L. Minkov |
| author_facet | F. I. Panteleenko V. A. Zelenin A. L. Minkov |
| author_sort | F. I. Panteleenko |
| collection | DOAJ |
| description | The influence of modes of preliminary heat treatment (HT) of P91 steel on crack formation during impact bending test has been investigated. Curves of dependence of force variation in time and specimen deflection variation depending on the force have been experimentally obtained, by which the following were determined: crack nucleation energy, crack development energy, maximum value of specimen deflection before fracture, maximum force and fracture force, strain rate, time before fracture, amount of fibrous component, impact toughness, stress intensity coefficient. The fractures were investigated by optical microscopy methods. It is shown that standard pre‑welding heat treatment (HT) of P91 steel – double normalization significantly reduces impact toughness, transforming the fracture into a quasi‑brittle state. The use of different variants of thermocyclic treatment (TCT) increases the total fracture energy and minimizes the amount of brittle component, while after TCT the fracture has mainly intracrystalline character. |
| format | Article |
| id | doaj-art-a28539d7f586458e9cbcd387cb45314b |
| institution | Kabale University |
| issn | 1683-6065 2414-0406 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Belarusian National Technical University |
| record_format | Article |
| series | Литьë и металлургия |
| spelling | doaj-art-a28539d7f586458e9cbcd387cb45314b2025-08-20T03:59:49ZengBelarusian National Technical UniversityЛитьë и металлургия1683-60652414-04062025-01-0104859410.21122/1683-6065-2024-4-85-943611Research of fracture mechanism of steel grade P91 on impact bending after preheat treatment before weldingF. I. Panteleenko0V. A. Zelenin1A. L. Minkov2Belarusian National Technical UniversityPhysical‑Technical Institute of the National Academy of Science of BelarusBelarusian National Technical UniversityThe influence of modes of preliminary heat treatment (HT) of P91 steel on crack formation during impact bending test has been investigated. Curves of dependence of force variation in time and specimen deflection variation depending on the force have been experimentally obtained, by which the following were determined: crack nucleation energy, crack development energy, maximum value of specimen deflection before fracture, maximum force and fracture force, strain rate, time before fracture, amount of fibrous component, impact toughness, stress intensity coefficient. The fractures were investigated by optical microscopy methods. It is shown that standard pre‑welding heat treatment (HT) of P91 steel – double normalization significantly reduces impact toughness, transforming the fracture into a quasi‑brittle state. The use of different variants of thermocyclic treatment (TCT) increases the total fracture energy and minimizes the amount of brittle component, while after TCT the fracture has mainly intracrystalline character.https://lim.bntu.by/jour/article/view/3745thermocyclic treatmentfractureimpact toughnesscrack nucleation energycrack development energysample deflection value before fracturemaximum force and fracture forcestrain rate, time to fractureamount of fibrous componentstress intensity coefficient |
| spellingShingle | F. I. Panteleenko V. A. Zelenin A. L. Minkov Research of fracture mechanism of steel grade P91 on impact bending after preheat treatment before welding Литьë и металлургия thermocyclic treatment fracture impact toughness crack nucleation energy crack development energy sample deflection value before fracture maximum force and fracture force strain rate, time to fracture amount of fibrous component stress intensity coefficient |
| title | Research of fracture mechanism of steel grade P91 on impact bending after preheat treatment before welding |
| title_full | Research of fracture mechanism of steel grade P91 on impact bending after preheat treatment before welding |
| title_fullStr | Research of fracture mechanism of steel grade P91 on impact bending after preheat treatment before welding |
| title_full_unstemmed | Research of fracture mechanism of steel grade P91 on impact bending after preheat treatment before welding |
| title_short | Research of fracture mechanism of steel grade P91 on impact bending after preheat treatment before welding |
| title_sort | research of fracture mechanism of steel grade p91 on impact bending after preheat treatment before welding |
| topic | thermocyclic treatment fracture impact toughness crack nucleation energy crack development energy sample deflection value before fracture maximum force and fracture force strain rate, time to fracture amount of fibrous component stress intensity coefficient |
| url | https://lim.bntu.by/jour/article/view/3745 |
| work_keys_str_mv | AT fipanteleenko researchoffracturemechanismofsteelgradep91onimpactbendingafterpreheattreatmentbeforewelding AT vazelenin researchoffracturemechanismofsteelgradep91onimpactbendingafterpreheattreatmentbeforewelding AT alminkov researchoffracturemechanismofsteelgradep91onimpactbendingafterpreheattreatmentbeforewelding |