Flow serrations and fracture morphologies of Cu-based bulk metallic glasses in energy release perspective

C.N. Kuo; H.M. Chen; X.H. Du; J.C. Huang

doi:10.1016/j.intermet.2010.04.018

Flow serrations and fracture morphologies of Cu-based bulk metallic glasses in energy release perspective

C.N. Kuo, H.M. Chen, X.H. Du, J.C. Huang^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

13 Citations (Scopus)

Abstract

Flow serrations and fracture morphologies of a Cu₅₀Zr₄₃Al₇ bulk metallic glass (BMG) compressed at a low strain rate were analyzed in an energy release perspective. The energy release at failure was estimated to be about two orders of magnitude larger than those in the serrated region. During consecutive propagation of a shear band, the temperature rise is estimated to be only a few degrees Kelvin, which eventually causes the intermittent shear region with regularly spaced striations on the fracture surface. The temperature rise of several-hundred degrees Kelvin caused by the high accumulated fracture energy release upon failure is sufficiently high to result in the viscosity drop within a propagating shear band and may lead to local melting on the separated surface.

Original language	English
Pages (from-to)	1648-1652
Journal	Intermetallics
Volume	18
Issue number	8
Online published	21 May 2010
DOIs	https://doi.org/10.1016/j.intermet.2010.04.018
Publication status	Published - Aug 2010
Externally published	Yes

Research Keywords

B. Glasses, metallic
B. Mechanical properties at ambient temperature
B. Plastic deformation mechanisms
F. Mechanical testing

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10.1016/j.intermet.2010.04.018

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title = "Flow serrations and fracture morphologies of Cu-based bulk metallic glasses in energy release perspective",

abstract = "Flow serrations and fracture morphologies of a Cu50Zr43Al7 bulk metallic glass (BMG) compressed at a low strain rate were analyzed in an energy release perspective. The energy release at failure was estimated to be about two orders of magnitude larger than those in the serrated region. During consecutive propagation of a shear band, the temperature rise is estimated to be only a few degrees Kelvin, which eventually causes the intermittent shear region with regularly spaced striations on the fracture surface. The temperature rise of several-hundred degrees Kelvin caused by the high accumulated fracture energy release upon failure is sufficiently high to result in the viscosity drop within a propagating shear band and may lead to local melting on the separated surface.",

keywords = "B. Glasses, metallic, B. Mechanical properties at ambient temperature, B. Plastic deformation mechanisms, F. Mechanical testing",

author = "C.N. Kuo and H.M. Chen and X.H. Du and J.C. Huang",

year = "2010",

month = aug,

doi = "10.1016/j.intermet.2010.04.018",

language = "English",

volume = "18",

pages = "1648--1652",

journal = "Intermetallics",

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TY - JOUR

T1 - Flow serrations and fracture morphologies of Cu-based bulk metallic glasses in energy release perspective

AU - Kuo, C.N.

AU - Chen, H.M.

AU - Du, X.H.

AU - Huang, J.C.

PY - 2010/8

Y1 - 2010/8

N2 - Flow serrations and fracture morphologies of a Cu50Zr43Al7 bulk metallic glass (BMG) compressed at a low strain rate were analyzed in an energy release perspective. The energy release at failure was estimated to be about two orders of magnitude larger than those in the serrated region. During consecutive propagation of a shear band, the temperature rise is estimated to be only a few degrees Kelvin, which eventually causes the intermittent shear region with regularly spaced striations on the fracture surface. The temperature rise of several-hundred degrees Kelvin caused by the high accumulated fracture energy release upon failure is sufficiently high to result in the viscosity drop within a propagating shear band and may lead to local melting on the separated surface.

AB - Flow serrations and fracture morphologies of a Cu50Zr43Al7 bulk metallic glass (BMG) compressed at a low strain rate were analyzed in an energy release perspective. The energy release at failure was estimated to be about two orders of magnitude larger than those in the serrated region. During consecutive propagation of a shear band, the temperature rise is estimated to be only a few degrees Kelvin, which eventually causes the intermittent shear region with regularly spaced striations on the fracture surface. The temperature rise of several-hundred degrees Kelvin caused by the high accumulated fracture energy release upon failure is sufficiently high to result in the viscosity drop within a propagating shear band and may lead to local melting on the separated surface.

KW - B. Glasses, metallic

KW - B. Mechanical properties at ambient temperature

KW - B. Plastic deformation mechanisms

KW - F. Mechanical testing

UR - http://www.scopus.com/inward/record.url?scp=77953650339&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-77953650339&origin=recordpage

U2 - 10.1016/j.intermet.2010.04.018

DO - 10.1016/j.intermet.2010.04.018

M3 - RGC 21 - Publication in refereed journal

SN - 0966-9795

VL - 18

SP - 1648

EP - 1652

JO - Intermetallics

JF - Intermetallics

IS - 8

ER -

Flow serrations and fracture morphologies of Cu-based bulk metallic glasses in energy release perspective

Abstract

Research Keywords

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