- Titel
- Microstructure evolution of gas-atomized Fe–6.5 wt% Si droplets
- Zitierfähige Url:
- https://nbn-resolving.org/urn:nbn:de:bsz:14-qucosa2-390478
- Quellenangabe
- Journal of materials research
Erscheinungsjahr: 2014
Jahrgang: 29
Heft: 4
Seiten: 527-534
ISSN: 0884-2914
E-ISSN: 2044-5326 - Erstveröffentlichung
- 2014
- Abstract (EN)
- The magnetic Fe–6.5 wt% Si powder was produced by gas atomization and its microstructure was also investigated. The secondary dendritic arm spacing (SDAS) is related to the droplet size, λ = 0.29 · D⁰·⁵, and the numerical solidification model was applied to the system, giving rise to the correlation of microstructure to the solidification process of the droplet. It is found that the solid fraction at the end of recalescence is strongly dependent on the undercooling achieved before nucleation; the chances for the smaller droplets to form the grain-refined microstructures are less than the larger ones. Furthermore, the SDAS is strongly influenced by the cooling rate of post-recalescence solidification, and the relationship can be expressed as follows, λ = 74.2 · (T)⁻⁰·³⁴⁷. Then, the growth of the SDAS is driven by the solute diffusion of the interdendritic liquids, leading to a coarsening phenomenon, shown in a cubic root law of local solidification time, λ = 10.73 · (tf)⁰·²⁹⁶.
- Andere Ausgabe
- Link zum Artikel der zuerst in der Zeitschrift 'Journal of materials research' erschienen ist
DOI: 10.1557/jmr.2014.12 - Freie Schlagwörter (DE)
- Fe-Si-Legierungen, Zerstäubung, Erstarrungsmikrostrukturen, SDAS, Abkühlgeschwindigkeit
- Freie Schlagwörter (EN)
- Fe–Si alloys, atomization, solidification microstructures, SDAS, cooling rate
- Klassifikation (DDC)
- 670
- Verlag
- Cambridge University Press, Cambridge
- Förder- / Projektangaben
- National Natural Science Foundation China (NSFC)
ID: 51074104 - National Natural Science Foundation China (NSFC)
China National Basic Research Development Project
(973)
ID: 2010CB630802 - Version / Begutachtungsstatus
- publizierte Version / Verlagsversion
- URN Qucosa
- urn:nbn:de:bsz:14-qucosa2-390478
- Veröffentlichungsdatum Qucosa
- 17.04.2020
- Dokumenttyp
- Artikel
- Sprache des Dokumentes
- Englisch
- Lizenz / Rechtehinweis
