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

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posted on 2024-02-09, 17:10 authored by H Shang, E Elmukashfi, J Čapek, P Lejcek, KR Hallam, ACF Cocks, C Hardie, TL Martin, PEJ Flewitt

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.

Funding

The Physics and Mechanics of Creep Cavity Nucleation and Sintering in Energy Materials

Engineering and Physical Sciences Research Council

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UKAEA (Grant COL062-22)

History

Author affiliation

School of Engineering, University of Leicester

Version

  • VoR (Version of Record)

Published in

Materialia

Volume

30

Pagination

101837

Publisher

Elsevier BV

issn

2589-1529

Copyright date

2023

Available date

2024-02-09

Language

en

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