Effects of Uniaxial Strain on the Structures of Vacancy Clusters in FCC Metals

Abstract:

The effects of [001] uniaxial strain on the stable structures and structural evolution of vacancy clusters in fcc metals, Cu, Ni, Al and Fe, have been studied and compared. Under uniaxial strain, the clusters in all these metals tend to align parallel or perpendicular to the strain axis under tensile or compressive strain. Moreover, both the body cluster and the {001} planar cluster become the dominant types. In addition, the stacking fault tetrahedron cluster becomes another dominant type in Al under compressive strain. The cluster structures in Fe are disordered under strain possibly because the pure fcc Fe is thermodynamically unstable under the current simulation condition.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 1340-1350
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.1340
• Online since: June 2017
• Authors: Fei Ye*, Hong Bo Xv, Jin Mei Liu, Ke Tong
• Keywords: Atomistic Simulation, Cluster, Uniaxial Strain, Vacancy

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