| Autor: |
R. Mishnev, Nadezhda Dudova, Rustam Kaibyshev |
| Rok vydání: |
2019 |
| Předmět: |
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| Zdroj: |
International Workshop "Multiscale Biomechanics and Tribology of Inorganic and Organic Systems" ; Mezhdunarodnaja konferencija "Perspektivnye materialy s ierarhicheskoj strukturoj dlja novyh tehnologij i nadezhnyh konstrukcij" ; VIII Vserossijskaja nauchno-prakticheskaja konferencija s mezhdunarodnym uchastiem, posvjashhennaja 50-letiju osnovanija Instituta himii nefti "Dobycha, podgotovka, transport nefti i gaza" : tezisy dokladov. |
| DOI: |
10.17223/9785946218412/60 |
| Popis: |
The effect of short-term aging (100 h) at 650°C on the temperature dependence of impact toughness and fracture behavior of advanced 10% Cr steel with low N and high B contents was studied. The steel in tempered condition exhibits the ductile-brittle transition temperature (DBTT) of ∼10°C and the Charpy V-notch impact energy of 240 J/cm2 at a temperature of 20°C. Aging for 100 h at 650°C leads to the increase in the DBTT to 35°C and decrease in the impact toughness at 20°C to 90 J/cm2. Effect of the fine (up to 100 nm) Laves phase particles precipitated at lath/grain boundaries on the impact toughness is analyzed. The Laves phase particles serve as additional nucleation sites for microcracks/voids facilitating unstable crack propagation. This is the main reason for decreasing the stable crack propagation energy and impact toughness of the steel. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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