|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Phase Transformations in Multi-component Systems: An MPMD Symposium Honoring Gary R. Purdy
||Grain Boundary Segregation of Nb in Fe-30%Mn Austenite Steels
||Madhumanti Bhattacharyya, Hatem S Zurob
|On-Site Speaker (Planned)
Niobium is known to segregate strongly to grain boundaries in steel. The strong interaction of Nb with grain-boundaries results in an important reduction of the grain boundary mobility and strong retardation of recrystallization and grain growth. In this study, the effect of Nb on the mobility of grain-boundaries in a second generation Fe-30%Mn TWIP steel is investigated. Grain growth kinetics was measured in a series of Nb-containing Fe-30%Mn model alloys. An estimate of the grain boundary mobility was obtained for various temperatures and niobium contents. The results are interpreted in terms of Cahn’s solute drag theory with special emphasis on estimating the binding energy of solute Nb to austenite grain boundaries. The predicted binding energies are compared to those directly measured by Atom Probe Tomography.
||Planned: A print-only volume