Adabifiroozjaei, Esmaeil ; Maccari, Fernando ; Schäfer, Lukas ; Jiang, Tianshu ; Recalde-Benitez, Oscar ; Chirkova, Alisa ; Shayanfar, Navid ; Dirba, Imants ; Kani, Nagaarjhuna A ; Shuleshova, Olga ; Winkler, Robert ; Zintler, Alexander ; Rao, Ziyuan ; Pfeuffer, Lukas ; Kovács, András ; Dunin-Borkowski, Rafal E. ; Skokov, Konstantin P. ; Gault, Baptiste ; Gruner, Markus ; Gutfleisch, Oliver ; Molina-Luna, Leopoldo (2023)
Martensitic Phase Transformation in Short-Range Ordered Fe50Rh50 System Induced by Thermal Stress and Mechanical Deformation.
In: Acta Materialia, 264
doi: 10.1016/j.actamat.2023.119577
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Metallic/intermetallic materials with BCC structures hold an intrinsic instability due to phonon softening along [110] direction, causing BCC to lower-symmetry phases transformation when the BCC structures are thermally or mechanically stressed. Fe50Rh50 binary system is one of the exceptional BCC structures (ordered-B2) that has not been yet showing such transformation upon application of thermal stress, although mechanical deformation results in B2 to disordered FCC (γ) and L10 phases transformation. Here, a comprehensive transmission electron microscopy (TEM) study is conducted on thermally-stressed samples of Fe50Rh50 induced by quenching in water and liquid nitrogen from 1150°C and 1250°C. We demonstrated that samples quenched from 1150°C into water and liquid nitrogen show the presence of 1/4{110} and 1/2{110} satellite reflections, the latter of which is expected from phonon dispersion curves obtained by density functional theory calculation. Therefore, it is proposed that Fe50Rh50 maintains the B2 structure that is in premartensite state. Once Fe50Rh50 is quenched from 1250°C into liquid nitrogen, formation of two short-range ordered tetragonal phases with various c/a ratios (∼1.15 and 1.4) is observed in line with phases formed from mechanically deformed (30%) sample. According to our observations, an accurate atomistic shear model ({110}<1-10>) is presented that describes the martensitic transformation of B2 to these tetragonal phases.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Adabifiroozjaei, Esmaeil ; Maccari, Fernando ; Schäfer, Lukas ; Jiang, Tianshu ; Recalde-Benitez, Oscar ; Chirkova, Alisa ; Shayanfar, Navid ; Dirba, Imants ; Kani, Nagaarjhuna A ; Shuleshova, Olga ; Winkler, Robert ; Zintler, Alexander ; Rao, Ziyuan ; Pfeuffer, Lukas ; Kovács, András ; Dunin-Borkowski, Rafal E. ; Skokov, Konstantin P. ; Gault, Baptiste ; Gruner, Markus ; Gutfleisch, Oliver ; Molina-Luna, Leopoldo |
| Art des Eintrags: | Bibliographie |
| Titel: | Martensitic Phase Transformation in Short-Range Ordered Fe50Rh50 System Induced by Thermal Stress and Mechanical Deformation |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Ort: | Amsterdam |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Acta Materialia |
| Jahrgang/Volume einer Zeitschrift: | 264 |
| DOI: | 10.1016/j.actamat.2023.119577 |
| Kurzbeschreibung (Abstract): | Metallic/intermetallic materials with BCC structures hold an intrinsic instability due to phonon softening along [110] direction, causing BCC to lower-symmetry phases transformation when the BCC structures are thermally or mechanically stressed. Fe50Rh50 binary system is one of the exceptional BCC structures (ordered-B2) that has not been yet showing such transformation upon application of thermal stress, although mechanical deformation results in B2 to disordered FCC (γ) and L10 phases transformation. Here, a comprehensive transmission electron microscopy (TEM) study is conducted on thermally-stressed samples of Fe50Rh50 induced by quenching in water and liquid nitrogen from 1150°C and 1250°C. We demonstrated that samples quenched from 1150°C into water and liquid nitrogen show the presence of 1/4{110} and 1/2{110} satellite reflections, the latter of which is expected from phonon dispersion curves obtained by density functional theory calculation. Therefore, it is proposed that Fe50Rh50 maintains the B2 structure that is in premartensite state. Once Fe50Rh50 is quenched from 1250°C into liquid nitrogen, formation of two short-range ordered tetragonal phases with various c/a ratios (∼1.15 and 1.4) is observed in line with phases formed from mechanically deformed (30%) sample. According to our observations, an accurate atomistic shear model ({110}<1-10>) is presented that describes the martensitic transformation of B2 to these tetragonal phases. |
| Zusätzliche Informationen: | Arikel-ID: 119577 |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Elektronenmikroskopie 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Funktionale Materialien |
| Hinterlegungsdatum: | 08 Dez 2023 12:22 |
| Letzte Änderung: | 08 Dez 2023 12:22 |
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