Effect of stacking fault energy on strength and ductility of nanostructured alloys: An evaluation with minimum solution hardening

The effect of stacking fault energy (SFE) on the mechanical properties was investigated in Ni–Co alloys which have minimum solution hardening effects. Cobalt reduces the SFE in nickel and this promotes grain refinement during processing and increases the dislocation and twin densities. A reduction i...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2009-11, Vol.525 (1), p.83-86
Main Authors: Sun, Pei-Ling, Zhao, Y.H., Cooley, J.C., Kassner, M.E., Horita, Z., Langdon, T.G., Lavernia, E.J., Zhu, Y.T.
Format: Article
Language:English
Subjects:
Condensed matter: structure, mechanical and thermal properties
Ductility
Exact sciences and technology
High-pressure torsion
Mechanical and acoustical properties of condensed matter
Mechanical properties of nanoscale materials
Physics
Severe plastic deformation
Stacking fault energy
Strength
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Summary:The effect of stacking fault energy (SFE) on the mechanical properties was investigated in Ni–Co alloys which have minimum solution hardening effects. Cobalt reduces the SFE in nickel and this promotes grain refinement during processing and increases the dislocation and twin densities. A reduction in SFE increases strength and tensile ductility. The higher strength is due to grain refinement and higher dislocation and pre-existing twin densities whereas the higher ductility is attributed to a higher work hardening rate.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2009.06.030