The Role of Grain Boundary Diffusion in Initial Selective Oxidation Kinetics of a Manganese-Aluminum TRIP Steel
2005 (English)In: Journal of Phase Equilibria and Diffusion, ISSN 1547-7037, Vol. 26, no 5, 539-546 p.Article in journal (Refereed) Published
Confocal scanning laser microscopy (CSLM) was used in real-time observation of alloy element oxidation of a manganese/aluminum transformation induced plasticity (TRIP) steel. CSLM images reveal a marked role of grain boundaries in the overall initial oxidation kinetics of the alloy and consequently in the morphology of the initial surface oxide. Changing the grain size and the oxidation temperature results in a change in the overall kinetics of selective oxidation and in the importance of oxidation at grain boundaries, respectively. Electron backscattered diffraction mapping was used to characterize the grain boundaries intersecting the surface over an area of the alloy. Subsequent CSLM observation of selective oxidation over the same area allowed quantification of oxidation kinetics as a function of individual grain boundary misorientation.
Place, publisher, year, edition, pages
2005. Vol. 26, no 5, 539-546 p.
Electron diffraction, Grain boundaries, Morphology, Oxidation, Plasticity, Reaction kinetics, Confocal scanning laser microscopy (CSLM), Selective oxidation, Surface oxides, Transformation induced plasticity (TRIP)
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-8547DOI: 10.1361/154770305X66691ISI: 000232570000023OAI: oai:DiVA.org:kth-8547DiVA: diva2:13900
QC 20100914. Uppdaterad från submitted till published (20100914).2008-06-022008-06-022010-11-25Bibliographically approved