RT journal article
T1 Textural, Microstructural and Chemical Characterization of Ferritic Stainless Steel Affected by the Gold Dust Defect
A1 Amaya Dolores, Beatriz
A1 Ruiz Flores, Andrés
A1 Núñez Galindo, Andrés
A1 Calvino Gámez, José Juan
A1 Almagro Bello, Juan F.
A1 Lajaunie, Luc Cyrille Jacques
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 ferritic stainless steel
K1 AISI 430
K1 grains texture
K1 electron backscatter diffraction (EBSD)
K1 microstructure
K1 transmission electron microscopy (TEM)
K1 monochromated electron energy-loss spectroscopy (EELS)
K1 oxidations states
K1 machine learning
K1 k-means clustering
AB The “gold dust defect” (GDD) appears at the surface of ferritic stainless steels (FSS) anddegrades their appearance. Previous research showed that this defect might be related to intergranularcorrosion and that the addition of aluminium improves surface quality. However, the nature andorigin of this defect are not properly understood yet. In this study, we performed detailed electronbackscatter diffraction analyses and advanced monochromated electron energy-loss spectroscopyexperiments combined with machine-learning analyses in order to extract a wealth of informationon the GDD. Our results show that the GDD leads to strong textural, chemical, and microstructuralheterogeneities. In particular, the surface of affected samples presents an  -fibre texture which ischaracteristic of poorly recrystallised FSS. It is associated with a specific microstructure in whichelongated grains are separated from the matrix by cracks. The edges of the cracks are rich inchromium oxides and MnCr2O4 spinel. In addition, the surface of the affected samples presentsa heterogeneous passive layer, in contrast with the surface of unaffected samples, which shows athicker and continuous passive layer. The quality of the passive layer is improved with the additionof aluminium, explaining the better resistance to the GDD.
PB MDPI
SN 1996-1944
YR 2023
FD 2023
LK http://hdl.handle.net/10498/32043
UL http://hdl.handle.net/10498/32043
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 13-nov-2026