Indentation size effect and shear transformation zone size in a bulk metallic glass in two different structural states
DC Field | Value | Language |
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dc.contributor.author | Choi, In-Chul | - |
dc.contributor.author | Zhao, Yakai | - |
dc.contributor.author | Kim, Yong-Jae | - |
dc.contributor.author | Yoo, Byung-Gil | - |
dc.contributor.author | Suh, Jin-Yoo | - |
dc.contributor.author | Ramamurty, Upadrasta | - |
dc.contributor.author | Jang, Jae-il | - |
dc.date.accessioned | 2022-07-16T12:57:25Z | - |
dc.date.available | 2022-07-16T12:57:25Z | - |
dc.date.created | 2021-05-12 | - |
dc.date.issued | 2012-11 | - |
dc.identifier.issn | 1359-6454 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/164301 | - |
dc.description.abstract | The existence of an indentation size effect (ISE) in the onset of yield in a Zr-based bulk metallic glass (BMG) is investigated by employing spherical-tip nanoindentation experiments. Statistically significant data on the load at which the first pop-in in the displacement occurs were obtained for three different tip radii and in two different structural states (as-cast and structurally relaxed) of the BMG. Hertzian contact mechanics were employed to convert the pop-in loads to the maximum shear stress underneath the indenter. Results establish the existence of an ISE in the BMG of both structural states, with shear yield stress increasing with decreasing tip radius. Structural relaxation was found to increase the yield stress and decrease the variability in the data, indicating "structural homogenization" with annealing. Statistical analysis of the data was employed to estimate the shear transformation zone (STZ) size. Results of this analysis indicate an STZ size of similar to 25 atoms, which increases to similar to 34 atoms upon annealing. These observations are discussed in terms of internal structure changes that occur during structural relaxation and their interaction with the stressed volumes in spherical indentation of a metallic glass. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | PERGAMON-ELSEVIER SCIENCE LTD | - |
dc.title | Indentation size effect and shear transformation zone size in a bulk metallic glass in two different structural states | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Jang, Jae-il | - |
dc.identifier.doi | 10.1016/j.actamat.2012.08.061 | - |
dc.identifier.scopusid | 2-s2.0-84867580268 | - |
dc.identifier.wosid | 000311188400041 | - |
dc.identifier.bibliographicCitation | ACTA MATERIALIA, v.60, no.19, pp.6862 - 6868 | - |
dc.relation.isPartOf | ACTA MATERIALIA | - |
dc.citation.title | ACTA MATERIALIA | - |
dc.citation.volume | 60 | - |
dc.citation.number | 19 | - |
dc.citation.startPage | 6862 | - |
dc.citation.endPage | 6868 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Metallurgy & Metallurgical Engineering | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Metallurgy & Metallurgical Engineering | - |
dc.subject.keywordPlus | AMORPHOUS-ALLOYS | - |
dc.subject.keywordPlus | DEFORMATION | - |
dc.subject.keywordPlus | PLASTICITY | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | FLOW | - |
dc.subject.keywordAuthor | Bulk metallic glass | - |
dc.subject.keywordAuthor | Nanoindentation | - |
dc.subject.keywordAuthor | Indentation size effect | - |
dc.subject.keywordAuthor | Shear transformation zone | - |
dc.subject.keywordAuthor | Yield strength | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S1359645412006179?via%3Dihub | - |
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