The effect of multiple martensitic transformations on diffusion of Fe and Ni atoms in Fe-31.7%Ni-0.06%C alloy
| Autor: | Viktor E. Iakovlev, Vladimir F Mazanko, V.E. Danil'chenko |
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| Jazyk: | angličtina |
| Předmět: |
Radioisotope
Austenite inorganic chemicals Materials science Nano Express Diffusion Metallurgy Alloy Analytical chemistry chemistry.chemical_element engineering.material Condensed Matter Physics Nickel Dislocations density chemistry Materials Science(all) Nanofragment Martensitic transformation Metastability Martensite Diffusionless transformation engineering General Materials Science Deformation (engineering) |
| Zdroj: | Nanoscale Research Letters |
| ISSN: | 1556-276X |
| DOI: | 10.1186/1556-276x-9-322 |
| Popis: | Diffusion characteristics of iron and nickel atoms were investigated using radioactive isotopes method in phase-hardened metastable iron-nickel Fe-31.7%Ni-0.06%C alloy with nanofragmented structure. It has been found that diffusion mobility of nickel and iron atoms in reverted austenite of Fe-31.7%Ni-0.06%C alloy significantly increases as the result of multiple γ-α-γ martensitic transformations. The diffusion coefficients of nickel and iron in the austenite at 400°C corresponded to the stationary diffusion coefficients at the temperatures above 900°C. The revealed diffusion acceleration at low temperatures is caused by high-density dislocations and additional low-angle subboundaries of disoriented nanofragments of reverted austenite and deformation twin subboundaries formed during multiple γ-α-γ cycles. |
| Databáze: | OpenAIRE |
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