Effect of temperature, time, and shear force on the morphology and size of dendrites in A356-Al2O3 composites

Autor:	Mansour Razavi, Mohammad Zakeri, Mohammad Reza Rahimipour, Amir Baghani, Fatemeh Heydari, Mohsen Ostad Shabani
Rok vydání:	2021
Předmět:	Squeeze casting Gravity (chemistry) Morphology (linguistics) Materials science Mechanical Engineering Shear force Composite number law.invention Dendrite (crystal) Mechanics of Materials law Sand casting Nano Materials Chemistry Ceramics and Composites Composite material
Zdroj:	Journal of Composite Materials. 56:329-338
ISSN:	1530-793X 0021-9983
DOI:	10.1177/00219983211052602
Popis:	Dendrite arm spacing (DAS) plays a vital role in determining mechanical properties of aluminum casting composites. In this study, the effects of three different methods of gravity sand casting, squeeze casting, and semi-solid compo-casting with different electromagnetic stirring currents and times on the microstructural morphology of A356-Al2O3 composites were investigated. In order to investigate effects of shear forces on the formation of the globular-like structure, samples with different stirring electric current and times were produced by compo-casting in semi-solid state and analyzed. Optical emission microscopy was used to study the microstructure and DAS of nanocomposites. Quantitative analysis of microstructure was performed by utilizing an image analysis system. In this study, the optimum temperature for composite fabrication for this type of composite was calculated to obtain the most appropriate morphology and size of the microstructure. Also, the appropriate time to keep this composite at this temperature was obtained, and finally the relevant microstructures were fully discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d9c6ebe1765295cd9a8da312e0ccdfe3 https://doi.org/10.1177/00219983211052602 Zobrazit plný text záznamu