In situ X-ray observation of semi-solid deformation and failure in Al-Cu alloys

A. B. Phillion; R. W. Hamilton; D. Fuloria; A. C L Leung; P. Rockett; T. Connolley; P. D. Lee

doi:10.1016/j.actamat.2010.11.005

In situ X-ray observation of semi-solid deformation and failure in Al-Cu alloys

A. B. Phillion, R. W. Hamilton, D. Fuloria, A. C L Leung, P. Rockett, T. Connolley, P. D. Lee

Research output: Contribution to journal › Article › peer-review

Abstract

Semi-solid deformation has been directly observed in an Al-12 wt.% Cu alloy through the combination of real-time synchrotron X-ray radiography and a bespoke high-temperature tensile tester over a range of fraction solid from 0.35 to 0.98. During deformation at low and moderate fraction solids, the X-ray radiographs indicate that there is significant feeding of interdendritic liquid in the region of strain localization prior to crack formation. Furthermore, the measured load required to initiate localized tensile deformation was found to be similar over the range of fraction solid 0.35 to 0.66. At higher fraction solids, the radiographic observations are consistent with classical hot tearing behaviour: limited liquid flow due to low permeability; void nucleation and coalescence; and final failure. Based on these results, a three-stage mechanism for semi-solid failure is proposed which includes the effects of liquid flow and micro-neck formation. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	1436-1444
Number of pages	8
Journal	Acta Materialia
Volume	59
Issue number	4
DOIs	https://doi.org/10.1016/j.actamat.2010.11.005
Publication status	Published - Feb 2011

Keywords

Al-Cu alloys
Deformation
Fracture
Semi-solid behaviour
X-ray radiography

Access to Document

10.1016/j.actamat.2010.11.005

Cite this

@article{ae4e261552dc438889b02616f5392bd0,

title = "In situ X-ray observation of semi-solid deformation and failure in Al-Cu alloys",

abstract = "Semi-solid deformation has been directly observed in an Al-12 wt.% Cu alloy through the combination of real-time synchrotron X-ray radiography and a bespoke high-temperature tensile tester over a range of fraction solid from 0.35 to 0.98. During deformation at low and moderate fraction solids, the X-ray radiographs indicate that there is significant feeding of interdendritic liquid in the region of strain localization prior to crack formation. Furthermore, the measured load required to initiate localized tensile deformation was found to be similar over the range of fraction solid 0.35 to 0.66. At higher fraction solids, the radiographic observations are consistent with classical hot tearing behaviour: limited liquid flow due to low permeability; void nucleation and coalescence; and final failure. Based on these results, a three-stage mechanism for semi-solid failure is proposed which includes the effects of liquid flow and micro-neck formation. {\textcopyright} 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.",

keywords = "Al-Cu alloys, Deformation, Fracture, Semi-solid behaviour, X-ray radiography",

author = "Phillion, {A. B.} and Hamilton, {R. W.} and D. Fuloria and Leung, {A. C L} and P. Rockett and T. Connolley and Lee, {P. D.}",

year = "2011",

month = feb,

doi = "10.1016/j.actamat.2010.11.005",

language = "English",

volume = "59",

pages = "1436--1444",

journal = "Acta Materialia",

issn = "1873-2453",

publisher = "Elsevier BV",

number = "4",

}

TY - JOUR

T1 - In situ X-ray observation of semi-solid deformation and failure in Al-Cu alloys

AU - Phillion, A. B.

AU - Hamilton, R. W.

AU - Fuloria, D.

AU - Leung, A. C L

AU - Rockett, P.

AU - Connolley, T.

AU - Lee, P. D.

PY - 2011/2

Y1 - 2011/2

N2 - Semi-solid deformation has been directly observed in an Al-12 wt.% Cu alloy through the combination of real-time synchrotron X-ray radiography and a bespoke high-temperature tensile tester over a range of fraction solid from 0.35 to 0.98. During deformation at low and moderate fraction solids, the X-ray radiographs indicate that there is significant feeding of interdendritic liquid in the region of strain localization prior to crack formation. Furthermore, the measured load required to initiate localized tensile deformation was found to be similar over the range of fraction solid 0.35 to 0.66. At higher fraction solids, the radiographic observations are consistent with classical hot tearing behaviour: limited liquid flow due to low permeability; void nucleation and coalescence; and final failure. Based on these results, a three-stage mechanism for semi-solid failure is proposed which includes the effects of liquid flow and micro-neck formation. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

AB - Semi-solid deformation has been directly observed in an Al-12 wt.% Cu alloy through the combination of real-time synchrotron X-ray radiography and a bespoke high-temperature tensile tester over a range of fraction solid from 0.35 to 0.98. During deformation at low and moderate fraction solids, the X-ray radiographs indicate that there is significant feeding of interdendritic liquid in the region of strain localization prior to crack formation. Furthermore, the measured load required to initiate localized tensile deformation was found to be similar over the range of fraction solid 0.35 to 0.66. At higher fraction solids, the radiographic observations are consistent with classical hot tearing behaviour: limited liquid flow due to low permeability; void nucleation and coalescence; and final failure. Based on these results, a three-stage mechanism for semi-solid failure is proposed which includes the effects of liquid flow and micro-neck formation. © 2010 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

KW - Al-Cu alloys

KW - Deformation

KW - Fracture

KW - Semi-solid behaviour

KW - X-ray radiography

U2 - 10.1016/j.actamat.2010.11.005

DO - 10.1016/j.actamat.2010.11.005

M3 - Article

SN - 1873-2453

VL - 59

SP - 1436

EP - 1444

JO - Acta Materialia

JF - Acta Materialia

IS - 4

ER -

In situ X-ray observation of semi-solid deformation and failure in Al-Cu alloys

Abstract

Keywords

Access to Document

Fingerprint

Cite this