Zhuang, Shiming and Lu, Jun and Ravichandran, Guruswami (2002) Shock wave response of a zirconium-based bulk metallic glass and its composite. Applied Physics Letters, 80 (24). pp. 4522-4524. ISSN 0003-6951 http://resolver.caltech.edu/CaltechAUTHORS:ZHUapl02
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A zirconium-based bulk metallic glass, Zr41.2Ti13.8Cu12.5Ni10Be22.5 (Vit 1), and its composite, Zr56.3Ti13.8Cu6.9Ni5.6Nb5.0Be12.5 (beta-Vit), were subjected to planar impact loading. A surprisingly low amplitude elastic precursor and bulk wave, corresponding to the elastic response of the "frozen structure" of the intact metallic glasses, were observed to precede the rate-dependent large deformation shock wave. A concave downward curvature after the initial increase of the U-s-U-p shock Hugoniots suggests that a phase-change-like transition occurred during shock compression. Further, compression damage occurred due to the shear localization. The spalling in Vit 1 was induced by shear localization, while in beta-Vit, it was due to debonding of the beta-phase boundary from the matrix. The spall strengths at strain rate of 2x10(6) s(-1) were determined to be 2.35 and 2.11 GPa for Vit 1 and beta-Vit, respectively.
|Additional Information:||Copyright © 2002 American Institute of Physics. Received 18 February 2002; accepted for publication 24 April 2002. The authors thank Professor W. L. Johnson for providing the materials and many fruitful discussions. The work was supported by the DARPA’s structural amorphous metals program through the Army Research Office (Grant No. DAAD # 19-01-1-0525).|
|Subject Keywords:||niobium alloys; zirconium alloys; titanium alloys; copper alloys; nickel alloys; beryllium alloys; metallic glasses; shock wave effects; compressive strength; shear strength; phase diagrams|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Tony Diaz|
|Deposited On:||09 May 2006|
|Last Modified:||26 Dec 2012 08:51|
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