Effect of Non-metallic Inclusions in Fe-Al-Ti-O-N-S Alloy on Grain Size

Effect of Non-metallic Inclusions in Fe-Al-Ti-O-N-S Alloy on Grain Size

The effect of characteristics of non-metallic inclusions in Fe-Al-Ti-O-N-S alloys with various compositions at 1473 K (1200 °C) on the microstructure was studied. The ASTM grain size number was determined in as-cast and heated samples by the optical microscopy, and the inclusion types in each sample...

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Veröffentlicht in:Metallurgical and materials transactions. B, Process metallurgy and materials processing science Process metallurgy and materials processing science, 2016-06, Vol.47 (3), p.1851-1857
Hauptverfasser: Choi, Wonjin, Matsuura, Hiroyuki, Tsukihashi, Fumitaka
Format: Artikel
Sprache:eng
Schlagworte:
Alloying additive
Characterization and Evaluation of Materials
Chemistry and Materials Science
Dispersion
Evolution
Grain size
Inclusions
Iron alloys
Materials Science
Metallic Materials
Metallurgy
Microstructure
Nanotechnology
Nonmetallic inclusions
Process metallurgy
Scanning electron microscopy
Structural Materials
Surfaces and Interfaces
Thin Films
Transaction processing
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Zusammenfassung:The effect of characteristics of non-metallic inclusions in Fe-Al-Ti-O-N-S alloys with various compositions at 1473 K (1200 °C) on the microstructure was studied. The ASTM grain size number was determined in as-cast and heated samples by the optical microscopy, and the inclusion types in each sample were determined from composition analysis by field-emission scanning electron microscope with energy-dispersive spectroscopy. The TiN-based inclusions certainly had a positive effect on the grain refinement. On the other hand, TiS-based inclusions exhibited no influence on the decrease of grain size. In addition, the formation and evolution behavior of inclusions by heating solid-state Fe-Al-Ti-O-N-S alloys with those locations were clarified. A different change of inclusions in alloys was observed depending on the distribution and composition of inclusions.
ISSN:1073-5615
1543-1916
DOI:10.1007/s11663-016-0617-x