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

Citeable URL: https://ir.library.oregonstate.edu/concern/articles/p2676w13w

Descriptions

Attribute Name	Values
Creator	Vallery, R. S. Liu, M. Gidley, D. W. Launey, M. E. Kruzic, J. J.
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. Keywords: fatigue cracks, copper alloys, Doppler broadening, deformation, beryllium alloys, voids (solid), annealing, zirconium alloys, titanium alloys, nickel alloys, metallic glasses, positron annihilation
Resource Type	Article
DOI	https://doi.org/10.1063/1.2825427
Date Available	2010-02-22T14:53:37+00:00
Date Issued	2007-12-26
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).
Journal Title	Applied Physics Letters
Journal Volume	91
Rights Statement	Copyright Not Evaluated
Publisher	American Institute of Physics
Language	English [eng]
Replaces	http://hdl.handle.net/1957/14516