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Enhanced fatigue endurance of metallic glasses through a staircase-like fracture mechanism

Gludovatz, Bernd and Demetriou, Marios D. and Floyd, Michael and Hohenwarter, Anton and Johnson, William L. and Ritchie, Robert O. (2013) Enhanced fatigue endurance of metallic glasses through a staircase-like fracture mechanism. Proceedings of the National Academy of Sciences of the United States of America, 110 (46). pp. 18419-18424. ISSN 0027-8424. PMCID PMC3832019. doi:10.1073/pnas.1317715110.

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We believe this article is of broad interest to the materials science and engineering community. Bulk-metallic glasses (BMGs) are currently considered candidate materials for numerous structural applications. A major limitation in their use as engineering material is the often poor and inconsistent fatigue behavior. Although recently developed BMG composites provide one solution to this problem, fatigue remains a main issue for monolithic metallic glasses. The authors report unexpectedly high fatigue resistance in a monolithic Pd-based glass arising from extensive shear-band plasticity, resulting in a very rough and periodic “staircase” crack trajectory. The research both reveals a unique mechanism in fatigue of a monolithic metallic glass and demonstrates that this mechanism mitigates previous limitations on its use as an engineering material.

Item Type:Article
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Additional Information:© 2013 National Academy of Sciences. Contributed by William L. Johnson, September 25, 2013 (sent for review December 28, 2012). This work was funded by the Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, of the US Department of Energy under Contract DE-AC02-05CH11231 (which provided financial support for B.G. and R.O.R.). M.D.D., M.F., and W.L.J. acknowledge funding support from the Office of Naval Research under Contract N00014-07-1-1115.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC02- 05CH11231
Office of Naval Research (ONR)N00014-07-1-1115
Subject Keywords:bulk amorphous alloy; fatigue life; damage tolerance
Issue or Number:46
PubMed Central ID:PMC3832019
Record Number:CaltechAUTHORS:20131205-150757891
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42868
Deposited On:06 Dec 2013 00:31
Last Modified:10 Nov 2021 16:29

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