Plasticity mechanisms in HfN at elevated and room temperature

dc.contributor.authorVinson, Katherine
dc.contributor.authorYu, Xiao-Xiang
dc.contributor.authorDe Leon, Nicholas
dc.contributor.authorWeinberger, Christopher R.
dc.contributor.authorThompson, Gregory B.
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherDrexel University
dc.date.accessioned2018-11-13T22:03:36Z
dc.date.available2018-11-13T22:03:36Z
dc.date.issued2016-10-06
dc.description.abstractHfN specimens deformed via four-point bend tests at room temperature and at 2300 degrees C (similar to 0.7 T-m) showed increased plasticity response with temperature. Dynamic diffraction via transmission electron microscopy (TEM) revealed < 110 > {111} as the primary slip system in both temperature regimes and < 110 > {110} to be a secondary slip system activated at elevated temperature. Dislocation line lengths changed from a primarily linear to a curved morphology with increasing temperature suggestive of increased dislocation mobility being responsible for the brittle to ductile temperature transition. First principle generalized stacking fault energy calculations revealed an intrinsic stacking fault (ISF) along < 112 > {111}, which is the partial dislocation direction for slip on these close packed planes. Though B1 structures, such as NaCl and HfC predominately slip on < 110 > {110}, the ISF here is believed to facilitate slip on the {111} planes for this B1 HfN phase.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationVinson, K., et al. (2016): Plasticity Mechanisms in HfN at Elevated and Room Temperature. Scientific Reports, vol. 6. DOI: https://doi.org/10.1038/srep34571
dc.identifier.doi10.1038/srep34571
dc.identifier.orcidhttps://orcid.org/0000-0001-9550-6992
dc.identifier.urihttp://ir.ua.edu/handle/123456789/4950
dc.languageEnglish
dc.language.isoen_US
dc.publisherNature Portfolio
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAB-INITIO INVESTIGATIONS
dc.subjectSTACKING-FAULT ENERGY
dc.subjectPHASE-STABILITY
dc.subjectTANTALUM CARBIDE
dc.subjectSINGLE-CRYSTALS
dc.subjectDEFORMATION
dc.subjectBEHAVIOR
dc.subjectHAFNIUM
dc.subjectFLOW
dc.subjectMultidisciplinary Sciences
dc.subjectScience & Technology - Other Topics
dc.titlePlasticity mechanisms in HfN at elevated and room temperatureen_US
dc.typetext
dc.typeArticle
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