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IJSTR >> Volume 9 - Issue 1, January 2020 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Deformation Studies On Aa7075 Reinforced With Sic/Fa/Graphite Quad Metal Matrix Composite (Qmmc)

[Full Text]



Kiran Kumar Bunga, Dr. L. V. Venugopala Rao, Dr D Lingaraju, Uppada Sri Ramakanth,*



Compression, AA7075, Metal Matrix, Reinforcements, Hydro static stress



The present research work aim is to find the compression characteristics of AA7075 metal matrix composite using a traditional analytical method and finite element method. Regarding AA7075 is reinforced with Silicon carbide, fly ash and graphite particulates in vertex method under stir casting route. The samples are fabricated by considering silicon carbide 3, 4.5, and 6 weight percentages, fly ash and graphite equal weight percentage ratios of 3, 4.5 and 6 were reinforced with AA7075. The fabricated samples are machined using computer numerical control machine to acquiring the required dimensions of the samples. There are four standard different geometrical shapes are manufactured for this analysis The deformation or homogenous compression test was performed on UTM (Instron machine) for the three different reinforcements of AA7075 under no friction condition between the sample and contact surfaces. The deformation in axial and circumferential direction was found for base AA7075 and reinforced composites for aspect ratios 1.0 and 1.5. The deformation in height with diameter is maximum for 9% of reinforced composite compare to AA7075 and other composites for aspect ratio 1.0,the maximum deformation was observed for 12% of composite composites compare to other materials for H/D ratio 1.5.The strength coefficient K and strain hardening n are good for the 9% of reinforced composite it indicates the good plastic behaviour compare to base and other composites for H/D ratio 1.0, whereas for H/D ratio 1.5 the a good plastic behaviour exhibit for the 6%of composite At beginning of the deformation the axial stress are increased after upset of the sample it was decreased for aspect ratios, for AA7075 base material the axial stress are in tension it indicates the sample was not fractured. The circumferential stress are always in compression for all the cases for lower aspect ratio the circumferential and hydro static stress are high compare to higher aspect ratio of base and reinforced composites.



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