Constitutive modeling of elastoplasticity in spark-plasma sintered metal-matrix nanocomposites
Autor: | M. Shahzeb Khan, Abul Fazal M. Arif, M. U. Siddiqui, Saheb Nouari |
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Rok vydání: | 2017 |
Předmět: |
010302 applied physics
Materials science Nanocomposite Mechanical Engineering Sintering 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Grain growth Mechanics of Materials 0103 physical sciences Volume fraction Hardening (metallurgy) General Materials Science Crystallite Particle size Composite material 0210 nano-technology Porosity |
Zdroj: | Materials Science and Engineering: A. 689:176-188 |
ISSN: | 0921-5093 |
Popis: | A methodology to model the elastoplastic constitutive response of spark plasma sintered metal matrix particulate nanocomposites is presented. The formulated methodology incorporates the effect of Hall-Petch strengthening, Orowan strengthening, dislocation density strengthening, load transfer strengthening and porosity on the elastoplastic response of metal matrix nanocomposite using a mean-field homogenization approach used in conjunction with a plasticity hardening function for metal matrix that is dependent on the metal matrix crystallite size, inclusion particle size and inclusion volume fraction. The effect of sintering process parameters is incorporated into the model using a grain growth model that can estimate the average matrix crystallite size as a function of sintering time, sintering temperature, inclusion size and inclusion volume fraction. The formulated methodology has been validated against experimentally measured crystallite sizes and stress-strain responses of ball-milled and spark plasma sintered Al-Al 2 O 3 nanocomposite samples synthesized during the current work. Additional validation of the methodology against the experimental stress-strain response of nanostructured aluminum reported in the literature has also been carried out. |
Databáze: | OpenAIRE |
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