دورية أكاديمية
Short-term Creep Properties and Fracture Surface of 18 Ni (300) Maraging Steel Plasma Nitrided
| العنوان: | Short-term Creep Properties and Fracture Surface of 18 Ni (300) Maraging Steel Plasma Nitrided |
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| المؤلفون: | Adriano Gonçalves dos Reis, Danieli Aparecida Pereira Reis, Antônio Jorge Abdalla, Antônio Augusto Couto, Jorge Otubo |
| المصدر: | Materials Research, Vol 20, Iss suppl 2, Pp 2-9 (2017) |
| بيانات النشر: | Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol), 2017. |
| سنة النشر: | 2017 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials |
| مصطلحات موضوعية: | maraging, creep, plasma nitriding, fracture, Materials of engineering and construction. Mechanics of materials, TA401-492 |
| الوصف: | Plasma nitriding of a solution annealed and aged 300 grade maraging steel was studied aiming to increase the creep resistance. The surface microhardness reached 1,140 HV, producing 50 µm layer composed of ε-Fe3N and γ'-Fe4N nitrides at the uppermost sample layer. The inner core remained unaltered presenting typical plate-like martensite microstructure of maraging steels with average microhardness of 604 HV. Surface RMS roughness in the nanometric scale increase from 52 nm to 71 nm. The continuous layer of iron nitrides seems to behave as a barrier for oxidation and for inward oxygen diffusion improving the creep resistance by reducing the steady-state creep rate (εs) in 52-65% when compared with the literature results. Dominant creep mechanism is controlled by dislocations climb. Fracture surfaces of specimens presented ductile failure consisting of equiaxed and bi-modal dimples in the fibrous zone surrounded by 45º shear lip. Nitrided sample presented a reduced ductility, associated to the hard surface layer. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1516-1439 1980-5373 |
| Relation: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392017000800002&tlng=en; http://www.scielo.br/pdf/mr/v20s2/1516-1439-mr-1980-5373-MR-2016-0744.pdf; https://doaj.org/toc/1516-1439 |
| DOI: | 10.1590/1980-5373-mr-2016-0744 |
| URL الوصول: | https://doaj.org/article/b3305d2b10ed4f13b62268ed8e46b835 |
| رقم الأكسشن: | edsdoj.b3305d2b10ed4f13b62268ed8e46b835 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 15161439 19805373 |
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| DOI: | 10.1590/1980-5373-mr-2016-0744 |