Back to Search
Start Over
Quantitative ยต-CT Analysis of Scale Topology Formed During Oxidation of High SiMo Cast Iron.
- Source :
-
Oxidation of Metals . Oct2020, Vol. 94 Issue 3/4, p251-264. 14p. - Publication Year :
- 2020
-
Abstract
- High SiMo cast iron components in automotive exhaust systems are exposed to high-temperature oxidation over time. Quantitative analysis of formed oxide scale is therefore important for the assessment of a component durability. The brittle nature of multilayered scale and thermal stress limits capture of a true topology using traditional 2D destructive cut and polish methods. In this study, nondestructive high spatial-resolution 3D µCT analysis was performed on 2.90-mm-diameter oxidized specimens which permitted direct observation with 3.5 µm pixel resolution. The specimens were oxidized in three sequential time steps for a total 100 h at 700 °C and 800 °C in air and combustion gas atmospheres. A MATLAB-coded algorithm was used to quantify the topology, thickness variation in internal and external scale layers, and scale/metal interface unevenness. Scale topology was linked to oxidation temperature and gas atmosphere. A water vapor environment increases scale/metal interface unevenness and scale layer thickness irregularity which were related to an accelerated oxidation rate. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0030770X
- Volume :
- 94
- Issue :
- 3/4
- Database :
- Academic Search Index
- Journal :
- Oxidation of Metals
- Publication Type :
- Academic Journal
- Accession number :
- 146033737
- Full Text :
- https://doi.org/10.1007/s11085-020-09989-0