Screw-Dislocation-Induced Strengthening–Toughening Mechanisms in Complex Layered Materials: The Case Study of Tobermorite

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dc.citation.firstpage1496en_US
dc.citation.issueNumber2en_US
dc.citation.journalTitleACS Applied Materials & Interfacesen_US
dc.citation.lastpage1506en_US
dc.citation.volumeNumber9en_US
dc.contributor.authorZhang, Ningen_US
dc.contributor.authorCarrez, Philippeen_US
dc.contributor.authorShahsavari, Rouzbehen_US
dc.contributor.orgThe Richard E. Smalley Institute for Nanoscale Science and Technologyen_US
dc.date.accessioned2017-01-27T19:05:16Zen_US
dc.date.available2017-01-27T19:05:16Zen_US
dc.date.issued2017en_US
dc.description.abstractNanoscale defects such as dislocations have a profound impact on the physics of crystalline materials. Understanding and characterizing the motion of screw dislocation and its corresponding effects on the mechanical properties of complex low-symmetry materials has long been a challenge. Herein, we focus on triclinic tobermorite, as a model system and a crystalline analogue of layered hydrated cement, and report for the first time how the motion of screw dislocation can influence the strengthening–toughening relationship, imparting brittle-to-ductile transitions. By applying shear loading in tobermorite systems with single and dipole screw dislocations, we observe dislocation jogs around the dislocation core, which increases the yield shear stress and the work-of-fracture when the dislocation lines are along the [100] and [010] directions. Our results demonstrate that the dislocation core acts as a bottleneck for the initial straight gliding to induce intralaminar gliding, which consequently leads to a significant improvement in the mechanical properties. Together, the fundamental knowledge gained in this work on the role of the motion of the dislocation core on the mechanical properties provides an improved understanding of deformation mechanisms in cementitious materials and other complex layered systems, providing new hypotheses and design guidelines for the development of strong, ductile, and tough materials.en_US
dc.identifier.citationZhang, Ning, Carrez, Philippe and Shahsavari, Rouzbeh. "Screw-Dislocation-Induced Strengthening–Toughening Mechanisms in Complex Layered Materials: The Case Study of Tobermorite." <i>ACS Applied Materials & Interfaces,</i> 9, no. 2 (2017) American Chemical Society: 1496-1506. http://dx.doi.org/10.1021/acsami.6b13107.en_US
dc.identifier.doihttp://dx.doi.org/10.1021/acsami.6b13107en_US
dc.identifier.urihttps://hdl.handle.net/1911/93782en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.subject.keywordcementitious materialen_US
dc.subject.keyworddislocation jogen_US
dc.subject.keywordinterlaminar glidingen_US
dc.subject.keywordscrew dislocationen_US
dc.subject.keywordstrengthening−toughening mechanismen_US
dc.subject.keywordtobermoriteen_US
dc.titleScrew-Dislocation-Induced Strengthening–Toughening Mechanisms in Complex Layered Materials: The Case Study of Tobermoriteen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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