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Characterization of fatigue-induced free volume changes in bulk metallic glass using positron annihilation spectroscopy

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dc.creator Vallery, R. S.
dc.creator Liu, M.
dc.creator Gidley, D. W.
dc.creator Launey, M. E.
dc.creator Kruzic, J. J.
dc.date.accessioned 2010-02-22T14:53:37Z
dc.date.available 2010-02-22T14:53:37Z
dc.date.issued 2007-12-26
dc.identifier.citation Vallery, R. S., Liu, M., Gidley, D. W., Launey, M. E., & Kruzic, J. J. (2007). Characterization of fatigue-induced free volume changes in bulk metallic glass using positron annihilation spectroscopy [Electronic version]. Applied Physics Letters, 91(26). en
dc.identifier.uri http://hdl.handle.net/1957/14516
dc.description Article appears in Applied Physics Letters (http://apl.aip.org/) and is copyrighted by American Institute of Physics (http://www.aip.org/). en
dc.description.abstract Depth-profiled Doppler broadening spectroscopy of positron annihilation on the cyclic fatigue-induced fracture surfaces of three amorphous Zr₄₄Ti₁₁Ni₁₀Cu₁₀Be₂₅ metallic glass specimens reveals the presence of a 30–50 nm layer of increased free volume that is generated by the propagating fatigue crack tip. The presence and character of this fatigue transformation zone is independent of the initial amount of bulk free volume, which was varied by structural relaxation via annealing, and the voids generated in the zone by intense cyclic deformation are distinct from those typical of the bulk. en
dc.language.iso en_US en
dc.publisher American Institute of Physics en
dc.relation.ispartofseries Applied Physics Letters en
dc.relation.ispartofseries Vol. 91 (2007) en
dc.subject annealing en
dc.subject beryllium alloys en
dc.subject copper alloys en
dc.subject deformation en
dc.subject Doppler broadening en
dc.subject fatigue cracks en
dc.subject metallic glasses en
dc.subject nickel alloys en
dc.subject positron annihilation en
dc.subject titanium alloys en
dc.subject voids (solid) en
dc.subject zirconium alloys en
dc.title Characterization of fatigue-induced free volume changes in bulk metallic glass using positron annihilation spectroscopy en
dc.type Article en
dc.identifier.doi 10.1063/1.2825427


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