Dual roles of pearlite microstructure to interfere/facilitate gaseous hydrogen-assisted fatigue crack growth in plain carbon steels
| Autor: | Masami Nakamura, Haruki Nishida, Yuhei Ogawa, Alexander Vinogradov, Vigdis Olden, Hisao Matsunaga |
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| Rok vydání: | 2022 |
| Předmět: |
Materials science
Cementite Mechanical Engineering Delamination Fracture mechanics Paris' law Industrial and Manufacturing Engineering chemistry.chemical_compound Cracking Brittleness chemistry Mechanics of Materials Modeling and Simulation Ferrite (iron) General Materials Science Pearlite Composite material |
| Zdroj: | International Journal of Fatigue. 154:106561 |
| ISSN: | 0142-1123 |
| Popis: | Fatigue crack growth of two carbon steels with different pearlite volume fractions were studied in pressurized gaseous hydrogen environment. Notably, pearlite was found to mitigate hydrogen-assisted fatigue crack acceleration. This positive impact of pearlite was ascribed to ferrite/cementite lamellar aligned perpendicularly to the cracking direction, which functioned as barriers to intermittently arrest the crack propagation. Meanwhile, brittle delamination fracture ensued in the pearlite lamellar lying parallel to the crack-plane increased the crack growth rate and compromised the above positive effect to some extent. The material behavior is rationalized in light of fractographical observations and microstructural analyses of the crack-wake. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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