Academic Journal
Effect of the thermo‐mechanical processing on the impact toughness of a 12% cr martensitic steel with co, cu, w, mo and ta doping
| العنوان: | Effect of the thermo‐mechanical processing on the impact toughness of a 12% cr martensitic steel with co, cu, w, mo and ta doping |
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| المؤلفون: | Fedoseeva, Alexandra, Nikitin, Ivan, Dudova, Nadezhda, Hald, John, Kaibyshev, Rustam |
| المصدر: | Fedoseeva , A , Nikitin , I , Dudova , N , Hald , J & Kaibyshev , R 2022 , ' Effect of the thermo‐mechanical processing on the impact toughness of a 12% cr martensitic steel with co, cu, w, mo and ta doping ' , Metals , vol. 12 , no. 1 , 3 . https://doi.org/10.3390/met12010003 |
| سنة النشر: | 2022 |
| المجموعة: | Technical University of Denmark: DTU Orbit / Danmarks Tekniske Universitet |
| مصطلحات موضوعية: | Electron microscopy, Fracture toughness, Heat treatment, Martensitic steels, Optical metallography, Precipitation, Thermo‐mechanical processing |
| الوصف: | This paper presents the results of an experimental investigation of a 12% Cr steel where a significant increase in Charpy impact toughness and a slight decrease in ductile-brittle transition temperature (DBTT) from 70 °C to 65 °C were obtained through thermo-mechanical processing, including interim hot forging at 1050 °C with long-term annealing at 1000 °C, as compared with conventional heat treatment. At lower temperatures ranging from −20 °C to 25 °C, the value of impact toughness comprised ~40 J cm −2 in the present 12% Cr steel subjected to thermo-mechanical processing. The amount of δ-ferrite decreased to 3.8%, whereas the size of prior austenite grains did not change and comprised about 40–50 μm. The boundaries between δ-ferrite and martensitic laths were decorated by continuous chains of Cr- and W-rich carbides. M 23 C 6 carbides also precipitated along the boundaries of prior austenite grains, packets, blocks and martensitic laths. Thermo-mechanical processing increased the mean size of M 23 C 6 carbides and decreased their number particle densities along the lath boundaries. Moreover, the precipitation of a high number of non-equilibrium V-rich MX particles was induced by hot forging and long-term normalizing at 1000 °C for 24 h. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://orbit.dtu.dk/en/publications/394a3c33-0e5c-460d-b6a6-d26e08e0fcbc |
| DOI: | 10.3390/met12010003 |
| الاتاحة: | https://orbit.dtu.dk/en/publications/394a3c33-0e5c-460d-b6a6-d26e08e0fcbc https://doi.org/10.3390/met12010003 https://backend.orbit.dtu.dk/ws/files/266766510/metals_12_00003_v2_1_.pdf |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.C7F6290D |
| قاعدة البيانات: | BASE |
| DOI: | 10.3390/met12010003 |
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