Generalized stacking fault energy in FCC metals with MEAM

The second nearest-neighbor modified embedded atom method (2NN-MEAM) is used to investigate the generalized stacking fault (GSF) energy surfaces of eight FCC metals Cu, Ag, An, Ni, Pd, Pt, Al and Pb. An offset is observed in all the metals for the displacement delta(us) of unstable stacking fault energy from the geometrically symmetric displacement point delta(0)(us). The offset value is the greatest for Al and the smallest for Ag. By analyzing the stable stacking fault energy gamma(sf) and unstable stacking fault energy y gamma(usf), it can be predicted that stacking fault is more favorable in Cu, Ag, An, and especially in Pd than the other metals, while it is most preferred to create partial dislocation for Ag and to create full dislocation for Al. (c) 2007 Elsevier B.V. All rights reserved.