| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Advances in Metallic Coated Advanced Steels
|
| Presentation Title |
In Situ and Ex Situ Effects of Phase Transformation on Radiative Properties of Galvanneal Coating |
| Author(s) |
Michiyo Kagaya, Fatima K. Suleiman, Kyle J. Daun |
| On-Site Speaker (Planned) |
Michiyo Kagaya |
| Abstract Scope |
The galvannealing process requires precise temperature control in order to obtain an intermetallic layer that provides the desired weldability, paintability, and corrosion protection. Unfortunately, the coating transformation produces wavelength-dependent changes in the radiative properties that complicates online pyrometry. This study investigates the correlation between phase transformation and radiometric properties during galvannealing. Zinc-coated steel samples are annealed at different heating schedules, and in situ time-resolved NIR spectrometer measurements track the radiative properties as the coating evolves. The radiative properties and phase compositions of these samples are compared with ex situ FTIR and XRD measurements made on industrially processed specimens. The results elucidate the relationship between phases and radiometric properties during galvannealing and will make industrial pyrometry of galvannealed steels more robust. |