Simulation and analysis of the solidification characteristics of a Si-Mo ductile iron
High silicon and molybdenum ductile cast irons (Si-Mo alloys) are commonly used as exhaust manifold materials suffering from high temperature-oxidation and thermal-mechanical fatigue. The structural integrity of cast Si-Mo alloys under these service conditions is attributed to their microst...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
University of Belgrade, Technical Faculty, Bor
2021-01-01
|
| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2021/1450-53392100003C.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | High silicon and molybdenum ductile cast irons (Si-Mo alloys) are commonly
used as exhaust manifold materials suffering from high temperature-oxidation
and thermal-mechanical fatigue. The structural integrity of cast Si-Mo
alloys under these service conditions is attributed to their microstructure
consisting of spheroidal graphite and Mo-rich carbide embedded in a ferritic
matrix. However, the cast structure includes also pearlite structure having
a detrimental effect on the mechanical properties, therefore the cast matrix
needs to be heat treated. In this study, the solidification of a Si-Mo
ductile iron was investigated using (i) thermodynamic and kinetic
calculations by Thermo-Calc and DICTRA software and (ii) thermal analysis in
order to reveal out the sequence of phase formation and the phase
transformations during solidification and (iii) microanalysis by energy
dispersive spectrometer in order to determine elemental segregation and
compare with the calculated values. The solidified structure was also
characterized and all microstructural features were specified. |
|---|---|
| ISSN: | 1450-5339 2217-7175 |