The Thickness Distribution of Oxidation Film on Tapered Pipe Surface in Dieless Drawing
Figure 6
SEM images of oxidation film micromorphology. (a) the surface morphology of oxidation film without deformation and forming at 900°C in air; (b) the surface morphology of oxidation film forming at 900°C in air, and then deformation degree 5%, strain rate 10−3 s−1 at 900°C in vacuum environment; (c) the surface morphology of oxidation film forming at 900°C in air, and deformation degree is 10%, strain rate 10−3 s−1 at 900°C in vacuum environment; (d) the section plans of undeformed oxidation film; (e) the section plans of deformed oxidation film; (f) the section of surface oxidation film forming at 900°C in air after the deformation in vacuum environment: (i) epoxy resin, (ii) oxide film, and (iii) metal matrix.
