Small-angle neutron scattering quantification of phase separation and the corresponding embrittlement of a super duplex stainless steel after long-term aging at 300°C
| Autor: | Stephen M. King, Joakim Odqvist, Peter Hedström, Jianling Liu, Sten Wessman, Xin Xu, Yadunandan Das |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Spinodal decomposition Alloy Charpy impact test 02 engineering and technology engineering.material Neutron scattering 021001 nanoscience & nanotechnology 01 natural sciences Small-angle neutron scattering Ferrite (iron) 0103 physical sciences engineering Hardening (metallurgy) General Materials Science Composite material 0210 nano-technology Embrittlement |
| ISSN: | 2589-1529 |
| Popis: | Small-angle neutron scattering (SANS) was applied to quantify the nanostructural evolution during spinodal decomposition in a 25Cr-7Ni (wt.%) super duplex stainless steel isothermally aged at 300 °C, for up-to 48,000 h. Prior to the application on the 25Cr-7Ni alloy, the SANS methodology was validated by comparing results from SANS measurements on binary Fe-Cr alloys with atom probe tomography results. SANS results on the 25Cr-7Ni alloy indicated that decomposition wavelength decreased from 5.1 nm to 4.5 nm, whereas the amplitude increased from 15.0 to 33.4 at.%. This quantitative nanostructural evolution correlated to a hardening of the ferrite phase by 190 HV and a reduction of the sub-size Charpy-V impact toughness from 60 J to 25 J. |
| Databáze: | OpenAIRE |
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