Artículo
Effect of subsurface voids on the nanoindentation of Fe crystals
Fecha de publicación:
01/2020
Editorial:
IOP Publishing
Revista:
Modelling And Simulation In Materials Science And Engineering
ISSN:
0965-0393
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Subsurface voids may strongly affect the response of materials to nanoindentation. We explore these effects for a bcc single-crystalline Fe sample using molecular dynamics simulation. Deformation occurs mainly by nucleation and propagation of dislocations. As dislocations impinge into the voids, these suffer a reduction in volume, consistent with mass transfer mechanisms. Our results show that voids act as highly efficient absorbers of dislocations, effectively limiting the extension of the plastic zone. Surprisingly, mechanical properties are marginally affected by the presence of voids in the range of sizes and spatial distributions tested, except for voids a few nanometers below the surface. Deformation twinning is observed as a transient effect in some cases; however, for voids close enough to the indentation area, no twinning was found.
Palabras clave:
DISLOCATIONS
,
MOLECULAR DYNAMICS
,
NANOINDENTATION
,
VOIDS
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos(ICB)
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Citación
Hofer, Juan Andres; Ruestes, Carlos Javier; Bringa, Eduardo Marcial; Urbassek, Herbert M.; Effect of subsurface voids on the nanoindentation of Fe crystals; IOP Publishing; Modelling And Simulation In Materials Science And Engineering; 28; 2; 1-2020; 1-18
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