• Treffer 4 von 16
Zurรผck zur Trefferliste

Mapping of lattice distortion in martensitic steelโ€”Comparison of different evaluation methods of EBSD patterns

  • To visualize the varying tetragonal distortions in high carbon martensitic steels by EBSD, two different approaches have been applied on backscattered Kikuchi diffraction (BKD) patterns. A band-edge refinement technique called Refined Accuracy (RA) (Oxford Instruments) is compared with a technique called Pattern Matching (PM), which optimizes the fit to a simulated BKD signal. RA distinguishes between hypothetical phases of different fixed ๐‘โˆ•๐‘Ž, while PM determines a best fitting continuous ๐‘โˆ•๐‘Ž by projective transformation of a master pattern. Both techniques require stored BKD patterns. The sensitivity of the ๐‘โˆ•๐‘Ž-determination was tested by investigating the microstructure of a ferritic steel with an expected ๐‘โˆ•๐‘Ž = 1. The influence of the Kikuchi pattern noise on ๐‘โˆ•๐‘Ž was compared for a single or 40 averaged frames per measuring point, and turned out to be not significant. The application of RA and PM on the martensitic microstructure delivered qualitatively similar maps of ๐‘โˆ•๐‘Ž. TheTo visualize the varying tetragonal distortions in high carbon martensitic steels by EBSD, two different approaches have been applied on backscattered Kikuchi diffraction (BKD) patterns. A band-edge refinement technique called Refined Accuracy (RA) (Oxford Instruments) is compared with a technique called Pattern Matching (PM), which optimizes the fit to a simulated BKD signal. RA distinguishes between hypothetical phases of different fixed ๐‘โˆ•๐‘Ž, while PM determines a best fitting continuous ๐‘โˆ•๐‘Ž by projective transformation of a master pattern. Both techniques require stored BKD patterns. The sensitivity of the ๐‘โˆ•๐‘Ž-determination was tested by investigating the microstructure of a ferritic steel with an expected ๐‘โˆ•๐‘Ž = 1. The influence of the Kikuchi pattern noise on ๐‘โˆ•๐‘Ž was compared for a single or 40 averaged frames per measuring point, and turned out to be not significant. The application of RA and PM on the martensitic microstructure delivered qualitatively similar maps of ๐‘โˆ•๐‘Ž. The comparison of RA and PM shows that RA is suitably fast and precise during mapping the martensite ๐‘โˆ•๐‘Ž ratio in analyses of high carbon martensite, especially for fast initial surveys. As RA leads quantitatively to higher noise in ๐‘โˆ•๐‘Ž, the PM analysis can be used for higher precision results.โ€ฆzeige mehrzeige weniger

Volltext Dateien herunterladen

  • Mapping of lattice distortion in....pdf
    eng

Metadaten exportieren

Weitere Dienste

Teilen auf Twitter Suche bei Google Scholar Anzahl der Zugriffe auf dieses Dokument
Metadaten
Autor*innen:G. Cios, A. Winkelmann, Gert Nolze, T. Tokarski, L. Rychlowski, L. Dan, P. Bala
Dokumenttyp:Zeitschriftenartikel
Verรถffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des รผbergeordneten Werkes (Englisch):Ultramicroscopy
Jahr der Erstverรถffentlichung:2023
Organisationseinheit der BAM:5 Werkstofftechnik
5 Werkstofftechnik / 5.1 Mikrostruktur Design und Degradation
Jahrgang/Band:253
Aufsatznummer:113824
Erste Seite:1
Letzte Seite:11
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tรคtigkeiten
Freie Schlagwรถrter:EBSD; Martensite; Steel; Strain; Tetragonality
Themenfelder/Aktivitรคtsfelder der BAM:Material
DOI:10.1016/j.ultramic.2023.113824
Verfรผgbarkeit des Dokuments:Datei im Netzwerk der BAM verfรผgbar ("Closed Access")
Datum der Freischaltung:06.09.2023
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:06.09.2023
Einverstanden
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.