Micro-analytical studies of discontinuous precipitation in Fe-13.5 at.% Zn alloy

• Autorzy: Zięba Paweł , Chronowski Mateusz , Morgiel Jerzy

Identyfikatory

DOI

10.1007/s43452-020-00082-6

• Języki publikacji: EN

Abstrakty

EN

For the first time, the analytical electron microscopy has been used to determine the solute concentration profiles left behind the moving reaction front (RF) of the discontinuous precipitation (DP) reaction in a Fe-13.5 at.% Zn alloy. These profiles have been converted into grain boundary diffusivity (sδDb) values, using Cahn’s diffusion equation in its original form and the data of the growth rate of the discontinuous precipitates obtained from independent measurements. This approach has essentially removed existing difference in comparison to sδDb values obtained from Cahn′s simplified and Petermann–Hornbogen models relevant for the global approach to the DP. Simultaneously, the local values of sδDb have been up to 8–10 orders of magnitude higher than the data for volume diffusion coefficients and much greater than for diffusion at the stationary grain boundaries of Zn in pure Fe. This is clear indication that the rate controlling factor for DP reaction in the Fe-13 at.% Zn alloy is diffusion at the moving RF.

Słowa kluczowe

EN

electron microscopy; concentration of the substance; precipitation

PL

mikroskopia elektronowa; stężenie substancji; wytrącanie

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2020
• Tom: Vol. 20, no. 3
• Strony: 190--196
• Opis fizyczny: Bibliogr. 26 poz., rys.

Twórcy

autor

Zięba Paweł

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta St. 25, 30‑059 Kraków, Poland

autor

Chronowski Mateusz

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta St. 25, 30‑059 Kraków, Poland
• AGH-University of Science and Technology, Kraków, Poland

autor

Morgiel Jerzy

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta St. 25, 30‑059 Kraków, Poland

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021)