Atomic redistribution in Fe-Cr system in the course of mechanical alloying and subsequent annealing

Porsev, V.E.; Ulyanov, A.L.; Dorofeev, G.A.

Статья опубликована в высокорейтинговом журнале

Информация о цитировании статьи получена из Web of Science, Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 23 января 2020 г.

Авторы: Porsev V.E., Ulyanov A.L., Dorofeev G.A.
Журнал: Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Том: 50
Номер: 12
Год издания: 2019
Издательство: ASM International
Местоположение издательства: United States
Первая страница: 5977
Последняя страница: 5989
DOI: 10.1007/s11661-019-05461-0
Аннотация: Evolution of the structure and atomic distribution in Fe1xCrx (x = 0.2, 0.3, 0.4 and 0.48) samples in the course of Fe and Cr elemental powder mechanical alloying (MA), as well as during the subsequent isochronous (4 hours) annealing in the 400 C to 700 C temperature range, has been studied using 57Fe Mo¨ssbauer spectrometry and X-ray diffraction with a focus on the short-range order (SRO). It was established that MA proceeds in one stage for x £ 0.3 or three consecutive stages for x > 0.3. The single-stage process is characterized by preferential penetration of Cr into the Fe matrix, while the three-stage process comprises diffusion of Cr into Fe as in the previous case, formation of Cr- and Fe-rich areas, and formation of homogeneous a-Fe(Cr) solid solution. The change in the MA mechanism occurs as Fe is saturated with Cr and is caused by the inversion of the mixing energy sign from negative to positive. For all samples with x £ 0.3 annealed at all temperatures and for x>0.3 annealed at 400 C, only a small trend toward SRO was observed (SRO parameter < 0). The samples with x > 0.3 annealed at temperatures>400 C are subjected to thermally induced decomposition, which is accompanied by chromium segregations to the grain boundaries.
Добавил в систему: Ульянов Александр Леонидович

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Atomic redistribution in Fe-Cr system in the course of mechanical alloying and subsequent annealingстатья

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