Aluminium Books 2017/3
Friction Stir Welding Dissimilar Aluminium Alloys
by Noor Zaman Khan, Arshad Noor Siddiquee, Zahid Akhtar Khan
The evolution of mechanical properties and its characterization is important to the weld quality whose further analysis requires mechanical property and microstructure correlation. Present book addresses the basic understanding of the Friction Stir Welding (FSW) process that includes effect of various process parameters on the quality of welded joints. It discusses about various problems related to the welding of dissimilar aluminium alloys including influence of FSW process parameters on the microstructure and mechanical properties of such alloys. As a case study, effect of important process parameters on joint quality of dissimilar aluminium alloys is included.
Ref. 31716
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Aluminium Alloy FoamPaperback
by Dipen Kumar Rajak
In course of the present research, composition of foam-filled multi tubes was studied by compression testing at quasi-static deformation rates. The Al-closed cell foams, used for the filling of tubes, were manufactured at AMPRI, Bhopal by using a patented process (melt route foaming). The stress-strain curve in all the tested foam samples was found to be similar. All the samples had four characteristics, an initial linear elastic region, yield point, plateau, and densification region. The densification strain was almost invariant to the relative density and the strain rate. The plateau stress was found to depend highly upon the relative density of Al-alloy. For each tube geometry investigated, the average crushing load and the quantity of specific energy absorption were calculated and the results were compared. Compression results revealed that when compared with empty tube samples, the energy absorption rate in the foam-filled samples increases considerably. The foam-filled section of tubes was found to have the maximum specific energy absorption rate. Energy absorption capacity in the foam-filled tubes (mild steel and aluminium) samples was found to increase with higher plateau.
Ref. 31717
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Structural, Electric & Magnetic study of CuxCo1-xAl2yFe2-2yO4 ferrites: Aluminium Substituted Copper Cobalt Mixed Ferrites Paperback
by Bhanudas Karche, Subhash Karande
Ferrite is a class of magnetic material. Naturally occurring ferrite is the ferrous ferrite(Fe3O4) as "Load Stone". In early days it was considered as ferromagnetic material. But latter on L Neel realized that, material consists uncompensated anti parallel spin arrangement and hence named as "Ferrimagnetic material. Ferrite is a special class of Ferrimagnetic material having interesting intrinsic properties. Basically Farous ferrite Fe3o4 is having double oxides Feo and Fe2O4. The properties can be alter by substituting divalent iron ion by divalent cations from transition elements. Properties can be significantly modified by substituting trivalent iron ion by another trivalent cations. Ferrites are found to be technologically and commercially useful magnetic material. Due to highly electrically resistive and low magnetic behavior as well as negative temperature coefficient of resistance along with low magnetic loss ferrites can be used at high frequencies. They find applications in the fields like elecommunications, electronic industries, data storage and processing. Aluminum substituted Copper Cobalt mixed CuxCo1-xAl2yFe2-2y ferrite system is prepared to study various properties.
Ref. 31718
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The Political Economy of Russian Aluminium Between the Dual State and Global Markets
by Godzimirski, Jakub M.
This book addresses how the progress of the Russian aluminium industry, which has developed into an important global actor, has been influenced by the interaction of global market forces and the evolution of the Russian political system. After the collapse of the Soviet Union, Russian aluminium producers needed to adapt to changing framework conditions, both with regards to the global aluminium market and in Russia. Examining the most important changes in the organization of the global aluminium trade – the reorganization and consolidation of Russian aluminium industry and its ‘oligarchization’ – Godzimirski charts the evolution of the relationship between political and economic power in Russia, and the impact that this development has had on survival and adaptation strategies of key aluminium players in the country.
Ref. 31719
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