Energy pathways and directionality in deformation twinningApplied Physics Letters (207)
AbstractWe present ab initiodensity functional theory calculations of twinning energy pathways for two opposite twinning modes, (111)[112¯] and (111)[1¯1¯2], in fcc materials to examine the directional nature of twinning which cannot be explained by classical twin nucleationmodels or the “twinnability” criterion. By accounting for these energy pathways in a multiscale model, we quantitatively predict the critical twinning stress for the (111)[1¯1¯2] mode to be substantially higher compared to the favorable (111)[112¯] mode (whose predicted stresses are in agreement with experiment), thus, ruling out twinning in the (111)[1¯1¯2] mode.
- Ab initio calculations,
Citation InformationS. Kibey, J. B. Liu, Duane D. Johnson and H. Sehitoglu. "Energy pathways and directionality in deformation twinning" Applied Physics Letters Vol. 91 Iss. 18 (207)
Available at: http://works.bepress.com/duane_johnson/86/