Artículo
Temperature effect on nanoporous gold under uniaxial tension and compression
Fecha de publicación:
12/2021
Editorial:
Elsevier
Revista:
Computational Materials Science
ISSN:
0927-0256
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Nanoporous gold (NP-Au) is of great interest to researchers due to its high surface area; and accordingly, the wide range of applications that the material can be utilized for especially those where high temperature is involved. Therefore, the effect of temperature on NP-Au is studied by performing Molecular Dynamics (MD) simulations at temperatures between 300 K and 700 K. Moreover, an Arrhenius type formulation is proposed to modify existing scaling laws to capture the temperature effect. Also, a series of temperature dependent modifications to an existing dislocation based constitutive model are proposed. The simulation results show that while the elastic modulus and yield stress are temperature dependent, their tension–compression asymmetries are not. Under both compression and tension, material strength is controlled by surface stresses and dislocation mobility. However, the dislocation density required to plastically deform the material is found to be completely temperature independent under tension, and becomes temperature dependent under compression once there is sufficient amount of ligaments merging and collapse.
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Articulos(ICB)
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Articulos de INSTITUTO INTERDISCIPLINARIO DE CIENCIAS BASICAS
Citación
Saffarini, Mohammed H.; Voyiadjis, George Z.; Ruestes, Carlos Javier; Temperature effect on nanoporous gold under uniaxial tension and compression; Elsevier; Computational Materials Science; 200; 12-2021; 1-14
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