A novel approach for evaluating creep damage and cavitation in copper bicrystals subject to constant load

Hao Shang; E. Elmukashfi; J Capek; P Lejcek; Keith R Hallam; A. C F Cocks; Chris Hardie; Tomas L Martin; Peter E J Flewitt

doi:10.1016/j.mtla.2023.101837

A novel approach for evaluating creep damage and cavitation in copper bicrystals subject to constant load

Hao Shang, E. Elmukashfi, J Capek, P Lejcek, Keith R Hallam, A. C F Cocks, Chris Hardie, Tomas L Martin, Peter E J Flewitt^*

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

1 Citation (Scopus)

Abstract

Creep in metal alloys is an important failure mode for high temperature and stress applications, but despite extensive study it is still not fully understood, particularly the early stage of creep cavity formation. This paper describes a novel constant load cantilever beam test to investigate creep damage and cavitation at grain boundaries in copper bicrystals. Bicrystals of copper have been prepared with the grain boundary oriented normal to the beam long axis, allowing the development of damage at a single boundary to be studied. Tests were conducted at a temperature of 285° C in a vacuum of 10-10 MPa. Creep cavitation is observed in copper bicrystals of {001} and {111} orientation with a 22° rotation at the boundary. We compare these data with observations for a polycrystalline copper specimen.

Original language	English
Article number	101837
Number of pages	5
Journal	Materialia
Volume	30
Early online date	25 Jun 2023
DOIs	https://doi.org/10.1016/j.mtla.2023.101837
Publication status	Published - 27 Jun 2023

Bibliographical note

Funding Information:
We thank EPSRC (Grant EP/R026076/1) and UKAEA (Grant COL062-22) for funding. We acknowledge the help from Dr. Antonio Fernandez-Caballero in Carlos III University of Madrid on bicrystal modelling and also from Dr Mehdi Mokhtarishirazabad; Mr. Ricky Billingham; Mr. Adrian Crimp and Mr. Duncan Tarling, University of Bristol, for technical support.

Funding Information:
We thank EPSRC (Grant EP/R026076/1 ) and UKAEA (Grant COL062-22 ) for funding. We acknowledge the help from Dr. Antonio Fernandez-Caballero in Carlos III University of Madrid on bicrystal modelling and also from Dr Mehdi Mokhtarishirazabad; Mr. Ricky Billingham; Mr. Adrian Crimp and Mr. Duncan Tarling, University of Bristol, for technical support.

Publisher Copyright:
© 2023 The Authors

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title = "A novel approach for evaluating creep damage and cavitation in copper bicrystals subject to constant load",

abstract = "Creep in metal alloys is an important failure mode for high temperature and stress applications, but despite extensive study it is still not fully understood, particularly the early stage of creep cavity formation. This paper describes a novel constant load cantilever beam test to investigate creep damage and cavitation at grain boundaries in copper bicrystals. Bicrystals of copper have been prepared with the grain boundary oriented normal to the beam long axis, allowing the development of damage at a single boundary to be studied. Tests were conducted at a temperature of 285° C in a vacuum of 10-10 MPa. Creep cavitation is observed in copper bicrystals of {001} and {111} orientation with a 22° rotation at the boundary. We compare these data with observations for a polycrystalline copper specimen.",

author = "Hao Shang and E. Elmukashfi and J Capek and P Lejcek and Hallam, {Keith R} and Cocks, {A. C F} and Chris Hardie and Martin, {Tomas L} and Flewitt, {Peter E J}",

note = "Funding Information: We thank EPSRC (Grant EP/R026076/1) and UKAEA (Grant COL062-22) for funding. We acknowledge the help from Dr. Antonio Fernandez-Caballero in Carlos III University of Madrid on bicrystal modelling and also from Dr Mehdi Mokhtarishirazabad; Mr. Ricky Billingham; Mr. Adrian Crimp and Mr. Duncan Tarling, University of Bristol, for technical support. Funding Information: We thank EPSRC (Grant EP/R026076/1 ) and UKAEA (Grant COL062-22 ) for funding. We acknowledge the help from Dr. Antonio Fernandez-Caballero in Carlos III University of Madrid on bicrystal modelling and also from Dr Mehdi Mokhtarishirazabad; Mr. Ricky Billingham; Mr. Adrian Crimp and Mr. Duncan Tarling, University of Bristol, for technical support. Publisher Copyright: {\textcopyright} 2023 The Authors",

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AU - Shang, Hao

AU - Elmukashfi, E.

AU - Capek, J

AU - Lejcek, P

AU - Hallam, Keith R

AU - Cocks, A. C F

AU - Hardie, Chris

AU - Martin, Tomas L

AU - Flewitt, Peter E J

N1 - Funding Information: We thank EPSRC (Grant EP/R026076/1) and UKAEA (Grant COL062-22) for funding. We acknowledge the help from Dr. Antonio Fernandez-Caballero in Carlos III University of Madrid on bicrystal modelling and also from Dr Mehdi Mokhtarishirazabad; Mr. Ricky Billingham; Mr. Adrian Crimp and Mr. Duncan Tarling, University of Bristol, for technical support. Funding Information: We thank EPSRC (Grant EP/R026076/1 ) and UKAEA (Grant COL062-22 ) for funding. We acknowledge the help from Dr. Antonio Fernandez-Caballero in Carlos III University of Madrid on bicrystal modelling and also from Dr Mehdi Mokhtarishirazabad; Mr. Ricky Billingham; Mr. Adrian Crimp and Mr. Duncan Tarling, University of Bristol, for technical support. Publisher Copyright: © 2023 The Authors

PY - 2023/6/27

Y1 - 2023/6/27

N2 - Creep in metal alloys is an important failure mode for high temperature and stress applications, but despite extensive study it is still not fully understood, particularly the early stage of creep cavity formation. This paper describes a novel constant load cantilever beam test to investigate creep damage and cavitation at grain boundaries in copper bicrystals. Bicrystals of copper have been prepared with the grain boundary oriented normal to the beam long axis, allowing the development of damage at a single boundary to be studied. Tests were conducted at a temperature of 285° C in a vacuum of 10-10 MPa. Creep cavitation is observed in copper bicrystals of {001} and {111} orientation with a 22° rotation at the boundary. We compare these data with observations for a polycrystalline copper specimen.

AB - Creep in metal alloys is an important failure mode for high temperature and stress applications, but despite extensive study it is still not fully understood, particularly the early stage of creep cavity formation. This paper describes a novel constant load cantilever beam test to investigate creep damage and cavitation at grain boundaries in copper bicrystals. Bicrystals of copper have been prepared with the grain boundary oriented normal to the beam long axis, allowing the development of damage at a single boundary to be studied. Tests were conducted at a temperature of 285° C in a vacuum of 10-10 MPa. Creep cavitation is observed in copper bicrystals of {001} and {111} orientation with a 22° rotation at the boundary. We compare these data with observations for a polycrystalline copper specimen.

U2 - 10.1016/j.mtla.2023.101837

DO - 10.1016/j.mtla.2023.101837

M3 - Article (Academic Journal)

SN - 2589-1529

VL - 30

JO - Materialia

JF - Materialia

M1 - 101837

ER -

A novel approach for evaluating creep damage and cavitation in copper bicrystals subject to constant load

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