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dc.contributor.author
Righi, Gaia  
dc.contributor.author
Briggs, Richard  
dc.contributor.author
Deluigi, Orlando Raul  
dc.contributor.author
Stan, Camelia V.  
dc.contributor.author
Singh, Saransh  
dc.contributor.author
Clarke, Samantha M.  
dc.contributor.author
Bringa, Eduardo Marcial  
dc.contributor.author
Smith, Raymond F.  
dc.contributor.author
Rudd, Robert E.  
dc.contributor.author
Park, Hye-Sook  
dc.contributor.author
Meyers, Marc A.  
dc.date.available
2024-01-05T10:50:14Z  
dc.date.issued
2023-09  
dc.identifier.citation
Righi, Gaia; Briggs, Richard; Deluigi, Orlando Raul; Stan, Camelia V.; Singh, Saransh; et al.; A spall and diffraction study of nanosecond pressure release across the iron ε-α phase boundary; Pergamon-Elsevier Science Ltd; Acta Materialia; 257; 9-2023; 1-8  
dc.identifier.issn
1359-6454  
dc.identifier.uri
http://hdl.handle.net/11336/222486  
dc.description.abstract
The extreme response of polycrystalline iron at high pressures and high strain rates is revealed by means of high-power laser pulses. The compression portion of the pulse coupled with x-ray diffraction identifies the expected body-centered cubic (α) to hexagonal close packed (ε) displacive transformation. Upon release, observation shows that the complete reverse transformation takes approximately 8 ns and that the structure returns to its initial microstructural configuration, in a reversible transformation path. This is in good agreement with molecular dynamics (MD) simulations which predict an inverse dependence between transformation time and strain rate. The grain size is reduced from μm to nm range during compression and begins increasing back to the original grain size on decompression. The kinetics of the transition is dictated by heterogenous nucleation as it follows the Johnson-Mehl-Avrami-Kolmogorov equation with the appropriate time exponent of ∼1. This is confirmed by MD simulations which also identify profuse twinning and dislocation generation. The tensile pulse generated upon reflection at the free surface is captured by time-resolved free surface velocity measurements from which a peak tensile stress of 7 GPa is obtained, in stark contrast with its quasi-static value of ∼200 MPa. At these strain rates, the strength of grain interiors, which is determined by twinning and slip exceeds the strength of the boundaries, and failure initiates preferentially in the latter.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Pergamon-Elsevier Science Ltd  
dc.rights
info:eu-repo/semantics/restrictedAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
HIGH PRESSURE  
dc.subject
IRON  
dc.subject
MOLECULAR DYNAMICS  
dc.subject
PHASE TRANSFORMATION  
dc.subject
SPALL  
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X-RAY DIFFRACTION  
dc.subject.classification
Física de los Materiales Condensados  
dc.subject.classification
Ciencias Físicas  
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CIENCIAS NATURALES Y EXACTAS  
dc.title
A spall and diffraction study of nanosecond pressure release across the iron ε-α phase boundary  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2024-01-03T12:28:23Z  
dc.journal.volume
257  
dc.journal.pagination
1-8  
dc.journal.pais
Estados Unidos  
dc.description.fil
Fil: Righi, Gaia. Lawrence Livermore National Laboratory; Estados Unidos  
dc.description.fil
Fil: Briggs, Richard. Lawrence Livermore National Laboratory; Estados Unidos  
dc.description.fil
Fil: Deluigi, Orlando Raul. Universidad de Mendoza. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina  
dc.description.fil
Fil: Stan, Camelia V.. Lawrence Livermore National Laboratory; Estados Unidos  
dc.description.fil
Fil: Singh, Saransh. Lawrence Livermore National Laboratory; Estados Unidos  
dc.description.fil
Fil: Clarke, Samantha M.. Lawrence Livermore National Laboratory; Estados Unidos  
dc.description.fil
Fil: Bringa, Eduardo Marcial. Universidad de Mendoza. Facultad de Ingenieria; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina  
dc.description.fil
Fil: Smith, Raymond F.. Lawrence Livermore National Laboratory; Estados Unidos  
dc.description.fil
Fil: Rudd, Robert E.. Lawrence Livermore National Laboratory; Estados Unidos  
dc.description.fil
Fil: Park, Hye-Sook. Lawrence Livermore National Laboratory; Estados Unidos  
dc.description.fil
Fil: Meyers, Marc A.. University of California; Estados Unidos  
dc.journal.title
Acta Materialia  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S1359645423004792  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.actamat.2023.119148