Relation between emissivity evolution during annealing and selective oxidation of TRIP steel

An Accurate Device for Apparent Emissivity Characterization in Controlled Atmospheric Conditions Up To 1423 K

“…Previous research indicates that the emissivity variation of steel can be associated with the surface oxide condition dynamically [46]. From our results, we find that the emissivity of oxidized samples also strongly depends upon oxide processes, including the oxide temperature, duration, and rate.…”

The Causes and Effects of Preannealed Radiative Property Variations Across Full‐Hard Advanced High‐Strength Steel Coils

“…Scanning Area Selection and Summary Statistics: The scanning area for the summary statistics presented in Table 1 was selected according to previous studies that have analyzed the surface parameters of AHSS such as Ham et al [11] and Lin et al [12,13] These studies used regions of approximately (500 Â 500 μm), an area of these dimensions was deemed to be accurate to ensure that they were representative of the sample while minimizing undue analysis time associated with a larger sample area. 2.…”

“…The surface area to be scanned using the Keyence microscope is determined by considering previous studies that have analyzed the surface roughness parameters of AHSS such as Ham et al [ 11 ] and Lin et al, [ 12,13 ] who used areas of ≈500 × 500 μm. In this study, more scanning areas and larger scanning areas are also tested for certain samples; this shows that an area of ≈500 × 500 μm is sufficient to minimize local effects (see Scanning Area Selection and Summary Statistics section) while minimizing undue analysis time associated with larger scan areas.…”

“…Somveille et al [ 9 ] also showed how oxidation of DP DP‐780 and 980 steels during annealing may influence emissivity and pyrometric temperature measurements. Ham et al [ 11 ] showed that surface oxides and preannealed surface roughness have a strong impact on the spectral emissivity of TRIP steel samples, primarily via the surface topography. Lin et al [ 12,13 ] and Suleiman et al [ 14 ] explored how the preannealed surface state of AHSS alloys (as‐received, polished, and roughened), alloy composition, and annealing atmosphere affect the spectral emissivity, and connected the surface states to the radiative properties through electromagnetic [ 12,13 ] and data‐driven models.…”

Development of a multivariate spectral emissivity model for an advanced high strength steel alloy through factorial design-of-experiments

“…Despite the known effects of surface roughness, alloy composition, dew point, and oxide film thickness on spectral emissivity [14,15], very few studies have reported multivariable emissivity relationships that account for these additional parameters. Iuchi et al [16] derived an emissivity model that considers oxide film growth on metal surfaces by expressing the directional and polarized emissivities as functions of direction, oxide film thickness, and optical constants of the metal and the oxide film.…”