| Autor: |
Baofeng Chen, Fuyao Yan, M.F. Yan, Yanxiang Zhang, Yueming Xu |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
Journal of Materials Research and Technology, Vol 19, Iss , Pp 46-60 (2022) |
| Druh dokumentu: |
article |
| ISSN: |
2238-7854 |
| DOI: |
10.1016/j.jmrt.2022.05.017 |
| Popis: |
In this paper, quenched AerMet100 steel specimens are plasma nitrided at different temperatures (from 440 °C to 500 °C), and their microstructures and mechanical properties are investigated. Surface layer hardness variation induced by plasma nitriding is also analyzed and correlated with microstructural characteristics and concentration distributions of carbon and nitrogen. Results show that wear resistance of AerMet100 steel after nitriding treatment exhibits various degrees of improvement compared with the un-treated specimen. Especially for the nitrided specimens from 460 °C to 500 °C, volume wear rate is reduced by more than 88%. Such great improvement is mainly attributed to the absence of brittle ε-Fe2-3N phase and the presence of a thick gradient nitrided layer. The interfacial properties of γ′-Fe4N(111)/α′N(011) are investigated by first-principles calculations. Six interface models with different γ′-Fe4N(111) termination and stacking sites are investigated to clarify their effects on the interfacial adhesion. The Fe-terminated Bridge site model exhibits a stronger adhesion tendency after relaxation, which can be regarded as the strongest interface. We found that the alloying additives benefit the γ′-(Fe,M)4N(111)Fe/α′N(011) interfacial adhesion in the order Si |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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