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Stress states in individual Si particles of a cast Al-Si alloy: Micro-Raman analysis and microstructure based modeling

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dc.contributor.author Joseph, Sudha
dc.contributor.author Kumar, S.
dc.contributor.author Bhadram, Venkata Srinu
dc.contributor.author Narayana, Chandrabhas
dc.date.accessioned 2016-10-18T04:48:44Z
dc.date.available 2016-10-18T04:48:44Z
dc.date.issued 2015
dc.identifier.citation Journal of Alloys and Compounds en_US
dc.identifier.citation 625 en_US
dc.identifier.citation Joseph, S.; Kumar, S.; Bhadram, V. S.; Narayana, C., Stress states in individual Si particles of a cast Al-Si alloy: Micro-Raman analysis and microstructure based modeling. Journal of Alloys and Compounds 2015, 625, 296-308. en_US
dc.identifier.issn 0925-8388
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/1874
dc.description Restricted access en_US
dc.description.abstract The stress states in Si particles of cast Al-Si based alloys depend on its morphology and the heat treatment given to the alloy. The Si particles fracture less on modification and fracture more in the heat treated condition. An attempt has been made in this work to study the effect of heat treatment and Si modification on the stress states of the particles. Such understanding will be valuable for predicting the ductility of the alloy. The stress states of Si particles are estimated by Raman technique and compared with the microstructure-based FEM simulations. Combination of Electron Back-Scattered Diffraction (EBSD) and frequency shift, polarized micro-Raman technique is applied to determine the stress states in Si particles with (111) orientations. Stress states are measured in the as-received state and under uniaxial compression. The residual stress, the stress in the elastic-plastic regime and the stress which causes fracture of the particles is estimated by Raman technique. FEM study demonstrates that the stress distribution is uniform in modified Si, whereas the unmodified Si shows higher and more complex stress states. The onset of plastic flow is observed at sharp corners of the particles and is followed by localization of strain between particles. Clustering of particles generates more inhomogeneous plastic strain in the matrix. Particle stress estimated by Raman technique is in agreement with FEM calculations. (C) 2014 Elsevier B.V. All rights reserved. en_US
dc.description.uri 1873-4669 en_US
dc.description.uri http://dx.doi.org/10.1016/j.jallcom.2014.10.207 en_US
dc.language English en
dc.language.iso English en_US
dc.publisher Elsevier Science Sa en_US
dc.rights ?Elsevier Science Sa, 2015 en_US
dc.subject Physical Chemistry en_US
dc.subject Materials Science en_US
dc.subject Metallurgy & Metallurgical Engineering en_US
dc.subject Al-Si alloy en_US
dc.subject Polarized Raman technique en_US
dc.subject Finite element modeling en_US
dc.subject Si modification en_US
dc.subject Heat treatment en_US
dc.subject Stress analysis en_US
dc.subject Metal-Matrix Composites en_US
dc.subject Finite-Element-Analysis en_US
dc.subject Aluminum-Alloy en_US
dc.subject Fracture en_US
dc.subject Silicon en_US
dc.subject Deformation en_US
dc.subject Simulation en_US
dc.subject Behavior en_US
dc.subject Visualization en_US
dc.subject Spectroscopy en_US
dc.title Stress states in individual Si particles of a cast Al-Si alloy: Micro-Raman analysis and microstructure based modeling en_US
dc.type Article en_US


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