A universal scaling of planar fault energy barriers in face-centered cubic metals

SCRIPTA MATERIALIA

卷:64

Article

Jin, Z. H.^1,2  Dunham, S. T.³  Gleiter, H.^2,4  Hahn, H.²  Gumbsch, P.^4,5 

[1] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

[2] Karlsruher Inst Technol, Inst Nanotechnol INT, D-76021 Karlsruhe, Germany

[3] Univ Washington, Dept Elect Engn, Seattle, WA 98195 USA

[4] Karlsruher Inst Technol, IZBS, D-76131 Karlsruhe, Germany

[5] Fraunhofer Inst Werkstoffmech IWM, D-79108 Freiburg, Germany

关键词: Metal and alloys;    Generalized stacking fault energies;    Lattice dislocation and planar fault;    Twinning;    First-principles calculation;   

DOI  :  10.1016/j.scriptamat.2010.11.033

来源: Elsevier

【 摘 要 】

Minimum energy paths for generating intrinsic, extrinsic and twin planar faults were calculated for a number of face-centered cubic (fcc) metals via ab initio techniques. It is found that when the lattice is faulted sequentially, the interaction with the existing fault tends to remain minimal for nearly all the fcc metals. Accordingly, a universal scaling law may be deduced based on a single parameter, namely the ratio between the intrinsic stacking fault energy and the relevant energy barrier. (C) 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free