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Title: Flow and Fracture of Bulk Metallic Glass Alloys and their Composites

Abstract

The fracture and plastic deformation mechanisms of a Zr-Ti-Ni-Cu-Be bulk metallic glass and a composite utilizing a crystalline reinforcement phase are reviewed. The relationship between stress state, free volume and shear band formation are discussed. Positron annihilation techniques were used to confirm the predicted increase in free volume after plastic straining. Strain localization and failure were examined for a wide range of stress states. Finally, methods for toughening metallic glasses are considered. Significant increases in toughness are demonstrated for a composite bulk metallic glass containing a ductile second phase which stabilizes shear band formation and distributes plastic deformation.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15013179
Report Number(s):
UCRL-JC-144380
Journal ID: ISSN 1345--9678; TRN: US0600907
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 42; Journal Issue: 4; Conference: United Engineering Foundation Conference on Bulk Metallic Glasses, Singapore, Sep 24 - Sep 28, 2000
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ALLOYS; ANNIHILATION; DEFORMATION; FRACTURES; GLASS; METALLIC GLASSES; PLASTICS; POSITRONS; SHEAR; STRAINS

Citation Formats

Flores, K M, Suh, D, Howell, R, Asoka-Kumar, P, and Dauskardt, R H. Flow and Fracture of Bulk Metallic Glass Alloys and their Composites. United States: N. p., 2001. Web. doi:10.2320/matertrans.42.619.
Flores, K M, Suh, D, Howell, R, Asoka-Kumar, P, & Dauskardt, R H. Flow and Fracture of Bulk Metallic Glass Alloys and their Composites. United States. doi:10.2320/matertrans.42.619.
Flores, K M, Suh, D, Howell, R, Asoka-Kumar, P, and Dauskardt, R H. Wed . "Flow and Fracture of Bulk Metallic Glass Alloys and their Composites". United States. doi:10.2320/matertrans.42.619. https://www.osti.gov/servlets/purl/15013179.
@article{osti_15013179,
title = {Flow and Fracture of Bulk Metallic Glass Alloys and their Composites},
author = {Flores, K M and Suh, D and Howell, R and Asoka-Kumar, P and Dauskardt, R H},
abstractNote = {The fracture and plastic deformation mechanisms of a Zr-Ti-Ni-Cu-Be bulk metallic glass and a composite utilizing a crystalline reinforcement phase are reviewed. The relationship between stress state, free volume and shear band formation are discussed. Positron annihilation techniques were used to confirm the predicted increase in free volume after plastic straining. Strain localization and failure were examined for a wide range of stress states. Finally, methods for toughening metallic glasses are considered. Significant increases in toughness are demonstrated for a composite bulk metallic glass containing a ductile second phase which stabilizes shear band formation and distributes plastic deformation.},
doi = {10.2320/matertrans.42.619},
journal = {},
issn = {1345--9678},
number = 4,
volume = 42,
place = {United States},
year = {2001},
month = {6}
}

Conference:
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