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