Small-angle neutron scattering investigation of plastically deformed stainless steel
| Autor: | D. N. Orlova, Eszter Rétfalvi, Alexander Lapin, Kir Konoplev, Gyula Török, Vitaly Didenko, V. T. Lebedev |
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| Rok vydání: | 2003 |
| Předmět: |
Austenite
Materials science Scattering engineering.material Neutron scattering Small-angle neutron scattering General Biochemistry Genetics and Molecular Biology Crystallography engineering Composite material Austenitic stainless steel Small-angle scattering Deformation (engineering) Intensity (heat transfer) |
| Zdroj: | Journal of Applied Crystallography. 36:629-631 |
| ISSN: | 0021-8898 |
| Popis: | The microstuctural evolution of plastically deformed steels has been studied by small-angle neutron scattering at ambient temperature in the range of momentum transfer q = (4π/λ)sin(θ/2) = 0.01–5 nm−1 where λ is neutron wavelength and θ is the scattering angle. Samples of austenite stainless steels were pulled on a standard bench to cause a plastic deformation, S = 0–60%, up to the fracture of the material. As a result of the deformation an increase of an order of magnitude was observed in the scatterred intensity I(q)~1/[1+(qRC )2](6-D s )/2. The analysis of the I(q) distribution has shown the surface fractal nature of the observed nano-scale structures. The evolution of internal surface via intensive growth of pores (size RC ~20–40 nm) was found and a linear decrease of the surface fractal dimension 2.9≥Ds (S)≥2.1 was observed. These findings can be used to design the fracture criteria for materials of industrial application. |
| Databáze: | OpenAIRE |
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