title: Microstructures of galvannealing coats plated on an iron substrate deformed by indentation.
abstract: Two different galvannealed (GA) steels with different formability performances were deformed at room temperature with a micro-Vickers indenter. Cross-sectional specimens for transmission electron microscopy were prepared from the indented areas using a focused ion beam technique. Direct evidence of plastic deformation of the GA coats was obtained. Cracks were observed to nucleate at triple points of two neighbouring Gamma and substrate Fe. The GA coat with better formability has finer grains than the GA coat, with worse formability.
authors.affiliation: Department of Quantum Engineering, Nagoya University, Nagoya 464-8603, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Kobayashi
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Saka
mesh_terms: D019544:Equipment Failure Analysis; D007501:Iron; D046529:Microscopy, Electron, Transmission; D013232:Steel
chemical_list: D013232:Steel; D007501:Iron