Investigation of effects of long-term thermal aging on magnetization process in low-alloy pressure vessel steels using first-order-reversal-curves
| Autor: | László Almásy, M. Horváth, Artem Feoktystov, Ákos Horváth, Qiang Tian, Satoru Kobayashi, F. Gillemot |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Alloy General Physics and Astronomy 02 engineering and technology engineering.material Neutron scattering Coercivity 021001 nanoscience & nanotechnology Magnetic hysteresis 01 natural sciences lcsh:QC1-999 Pressure vessel Magnetization Crystallography 0103 physical sciences engineering Stress relaxation ddc:530 0210 nano-technology Scaling lcsh:Physics |
| Zdroj: | AIP Advances 7(5), 056002-(2017). doi:10.1063/1.4973605 AIP Advances, Vol 7, Iss 5, Pp 056002-056002-6 (2017) |
| Popis: | We have investigated effects of long-term thermal aging at 550°C up to 10000 h on major-loop coercivity, hysteresis scaling of minor loops, and first-order reversal curves (FORCs) for low-alloy pressure vessel steels with low and high Ni contents. While major-loop coercivity and minor-loop coefficient of the scaling exhibit a gradual decrease with aging for high-Ni steel, those for low-Ni one are very weakly dependent on aging time. On the other hand, we found that FORC distribution becomes steep along both axes of interaction and switching fields and the peak shifts toward a lower switching field for both steels. Considering that there is no significant development of nanoscale precipitates during the aging as revealed with small-angle neutron scattering experiments, a relaxation of lattice strain in a matrix, possibly associated with diffusion of Ni atoms, may dominate magnetic properties at 550°C. |
| Databáze: | OpenAIRE |
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