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Multiple Avalanche Processes in Acoustic Emission Spectroscopy: Multibranching of the Energy−Amplitude Scaling

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cam.depositDate2021-12-22
cam.issuedOnline2021-12-21
dc.contributor.authorChen, Y
dc.contributor.authorGou, B
dc.contributor.authorYuan, B
dc.contributor.authorDing, X
dc.contributor.authorSun, J
dc.contributor.authorSalje, EKH
dc.contributor.orcidSalje, EKH [0000-0002-8781-6154]
dc.date.accessioned2021-12-23T00:31:39Z
dc.date.available2021-12-23T00:31:39Z
dc.date.issued2022
dc.date.updated2021-12-22T10:01:42Z
dc.description.abstract<jats:sec><jats:label /><jats:p>Several physical processes can conspire to generate avalanches in materials. Such processes include avalanche mechanisms like dislocation movements, friction processes by pinning magnetic domain walls, moving dislocation tangles, hole collapse in porous materials, collisions of ferroelectric and ferroelastic domain boundaries, kinks in interfaces, and many more. Known methods to distinguish between these species which allow the physical identification of multiavalanche processes are reviewed. A new approach where the scaling relationship between the avalanche energies <jats:italic>E</jats:italic> and amplitudes <jats:italic>A</jats:italic> is considered is then described. Avalanches with single mechanisms scale experimentally as <jats:italic>E</jats:italic> = <jats:italic>S<jats:sub>i</jats:sub></jats:italic><jats:italic>A<jats:sub>i</jats:sub></jats:italic><jats:sup>2</jats:sup>. The energy <jats:italic>E</jats:italic> reflects the duration <jats:italic>D</jats:italic> of the avalanche and <jats:italic>A</jats:italic>(<jats:italic>t</jats:italic>), the temporal amplitude. The scaling prefactor <jats:italic>S</jats:italic> depends explicitly on the duration of the avalanche and on details of the avalanche profiles. It is reported that <jats:italic>S</jats:italic> is not a universal constant but assumes different values depending on the avalanche mechanism. If avalanches coincide, they can still show multivalued scaling between <jats:italic>E</jats:italic> and <jats:italic>A</jats:italic> with different <jats:italic>S</jats:italic>‐values for each branch. Examples for this multibranching effect in low‐Ni 316L stainless steel, 316L stainless steel, polycrystalline Ni, TC21 titanium alloy, and a Fe<jats:sub>40</jats:sub>Mn<jats:sub>40</jats:sub>Co<jats:sub>10</jats:sub>Cr<jats:sub>10</jats:sub> high‐entropy alloy are shown.</jats:p></jats:sec>
dc.identifier.doi10.17863/CAM.79193
dc.identifier.eissn1521-3951
dc.identifier.issn0370-1972
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/331744
dc.language.isoeng
dc.publisherWiley
dc.publisher.departmentDepartment of Earth Sciences
dc.publisher.urlhttp://dx.doi.org/10.1002/pssb.202100465
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectacoustic emissions
dc.subjectavalanches
dc.subjectdeformation mechanisms
dc.titleMultiple Avalanche Processes in Acoustic Emission Spectroscopy: Multibranching of the Energy−Amplitude Scaling
dc.typeArticle
prism.publicationDate2021
prism.publicationNamePhysica Status Solidi (B) Basic Research
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P024904/1)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (861153)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L014793/1)
pubs.licence-display-nameApollo Repository Deposit Licence Agreement
pubs.licence-identifierapollo-deposit-licence-2-1
rioxxterms.typeJournal Article/Review
rioxxterms.versionVoR
rioxxterms.versionofrecord10.1002/pssb.202100465

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