Kim, C. Paul and Suh, Jin-Yoo and Wiest, Aaron and Lind, Mary Laura and Conner, R. Dale and Johnson, William L. (2009) Fracture toughness study of new Zr-based Be-bearing bulk metallic glasses. Scripta Materialia, 60 (2). pp. 80-83. ISSN 1359-6462 http://resolver.caltech.edu/CaltechAUTHORS:20090914-091033623
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Three new compositional variants of the Zr–Ti–Be–LTM (late transition metal) family of metallic glasses are discussed. Thermal stability, ΔT = T_x−T_g, was increased from 82 °C for Zr_(41.2)Ti_(13.8)Cu_(12.5)Ni_(10)Be_(22.5) (Viterloy 1) to 141 °C for Zr_(44)Ti_(11)Cu_(20)Be_(25). It is found that fracture toughness is the most distinguishing parameter characterizing the alloys in contrast to other mechanical properties. Quaternary alloys consistently had fracture toughness values exceeding 80 MPa m^(1/2), while for Vitreloy 1 K_Q = 48.5 MPa m^(1/2) with a large amount of scatter. Adding iron reduced the fracture toughness to 25 MPa m^(1/2).
|Additional Information:||Copyright © 2008 Acta Materialia Inc. Received 17 June 2008; revised 2 September 2008; accepted 3 September 2008. Available online 9 September 2008. The authors thank Prof. G. Ravichandran of GALCIT, Caltech for providing the MTS test system. This work was supported in part by the MRSEC Program of the National Science Foundation under Award No. DMR-0520565.|
|Subject Keywords:||Bulk amorphous materials; Metallic glasses; Fracture; Toughness|
|Official Citation:||Fracture toughness study of new Zr-based Be-bearing bulk metallic glasses C. Paul Kim, Jin-Yoo Suh, Aaron Wiest, Mary Laura Lind, R. Dale Conner, William L. Johnson Scripta Materialia - January 2009 (Vol. 60, Issue 2, Pages 80-83, DOI: 10.1016/j.scriptamat.2008.09.001)|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||George Porter|
|Deposited On:||02 Oct 2009 18:32|
|Last Modified:||26 Dec 2012 11:22|
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