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Severe Plastic Deformation of Aluminium Alloy

Severe Plastic Deformation of Aluminium Alloy

M Shantharaja; H S Siddesha

Scholars' Press
2019
pokkari
It is usually impossible to completely eliminate porosity, even in materials consolidated under very high pressure and temperature. In addition, nanopowders are very susceptible to oxidation and absorb large quantities of impurities such as O2, H2 and N2, making it difficult to obtain clean bulk materials. The porosity as well as impurities significantly affects the mechanical properties of the bulk materials, often making them brittle. These problems prevent us from studying the intrinsic properties of bulk nanomaterials. As a consequence of these difficulties, much attention has been paid to alternative procedures of introducing ultrafine grains in materials by severe plastic deformation.
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Beach Quality of Chennai City, Southeast India

Beach Quality of Chennai City, Southeast India

G Santhiya; C Lakshumanan; Usha Natesan

SCHOLARS' PRESS
2021
pokkari
The study area Chennai is a metropolitan city in the south east coast of India which extends up to 120 km. The second largest sandy beach is located in this area. The Landuse pattern is dominated by the residential and industrial categories. The coastal side being occupied by large scale industrial complexes in the north and residential resorts in the southern side of the city. pH, EC, TDS, Li+, NH4+, Na+, K+, Ca2+, Mg2+ as cations and F-, Br-, NO3-, NO2-, SO42-, PO34-, Cl- as anions have been analyzed in the coastal water samples collected during April 2009 (premonsoon) and January 2010 (postmonsoon) from 52 sampling stations along the coast seawater that is under the influences of natural and anthropogenic changes. The results indicated that the parameter sets indicated value changes due to seasonal variation. The overall results of the study indicated that some untreated effluent discharges and municipal sewage in to Ennore Creek, Adyar, Coovum, which carries pollutants in huge quantity in the northern part of the Chennai that are transported by the long shore currents to the southern part and further south.
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