How important have emerging and developing markets become in the global economy? According to Goldman Sachs, the combined gross national product (GNP) of the 15 leading emerging markets will overtake that of the leading developed economies (G7) by 2024 (Van Agtmael, 2009). General Motors and Coca-Cola have identified Asia, Russia, and Brazil as the regions where the majority of their growth wil...

In this paper, rotating bending fatigue tests of 2024-T4 Al alloy with different oxide coatings were carried out. Compared to the uncoated and previously reported oxide coatings of aluminum alloys, the fatigue strength is able to be enhanced by using a novel oxide coating with sealing pore technology. These results indicate that the better the coating surface quality is, the more excellent the ...

We present deep 3.6 cm radio continuum observations of the H II region NGC 2024 in Orion B obtained using the Very Large Array in its A-configuration, with 0. 2 angular resolution. We detect a total of 25 compact radio sources in a region of 4 × 4. We discuss the nature of these sources and its relation with the infrared and X-ray objects in the region. At least two of the radio sources are obs...

Joining of the similar & dissimilar materials alloys using heat friction in currently being used, especially for non-ferrous which are considered as non-weldable alloys. Al 2024-T6 6061-T6 having length 70mm and 12mm diameter were welded by welding process. Similar samples obtained applying different combinations parameters like pressure 30bar, forging from 50 to 60 bar, rotational speed 22...

Sol–gel films were prepared using different ratios of two silica precursors, vinyltrimethoxysilane (VTMS) and tetraethylorthosilicate (TEOS), targeting the anticorrosion treatment of aluminum alloy 2024-T3. The electrochemical behavior of the alloy coated with such films, which was studied in a 0.05 mol L -1 NaCl solution, revealed that the VTMS/TEOS ratio drastically affects the anticorrosion ...

In this paper we continue the study, which was initiated in (Ben-Artzi et al. in Math. Model. Numer. Anal. 35(2):313–303, 2001; Fishelov et al. in Lecture Notes in Computer Science, vol. 2667, pp. 809–817, 2003; Ben-Artzi et al. in J. Comput. Phys. 205(2):640–664, 2005 and SIAM J. Numer. Anal. 44(5):1997–2024, 2006) of the numerical resolution of the pure streamfunction formulation of the time-...

The production of batteries often involves the joining multilayered foils to a conductive tab. In present study, solid state spot welding method, refill friction stir (refill FSSW), was employed for commercially pure aluminum (CP–Al) 2024-T3 Al alloy sheets (tab). Defect-free welds with high lap shear strength (LSS) are obtained. stirred zone (SZ), 2024 is only found within shoulder region, whi...