[PDF] Top 20 La renta nacional y la estructura industrial

... as AA1070 Al alloy may clarify some doubts about the microstructural evolution and the effects of ECAP processing in refining the microstructure by the different routes of the ... See full document

... the ECAP process and (c) the stress relief near the ...the evolution of the compressive state towards positive or near zero ...the ECAP process and will remain constant, being ... See full document

... texture evolution of an Al-20Sn (mass % ) alloy processed by Equal Channel Angular Pressing is ...The evolution of dislocation cells into subgrains and the mechanical response of the ... See full document

... this process has led to improve mechanical properties, such as yield strength, fatigue, UTS, ...6061-T6 alloy; plastically deformed up to ¾ μ 6, by the ECAP process, following ... See full document

... Fig. 3(a) presents the effect of sheet thickness on von Mises stress induced in AA 1070 sheet during incremental deep drawing process. The effective stresses were, respectively, 193.17 MPa, 208.47 MPa and 200.13 ... See full document

... gradually from near- equiaxed shape to elongated shape during the rolling ...addition, from sample HR7 to sample HR+CR1, the fraction of HAGBs gradually increases with increasing the rolling reduction (as ... See full document

... EPMA analysis of the copper-rich phase, in which the copper-rich phase is alloyed with minor silver and titanium. The silver–copper hypoeutectic microstructure shown in Fig. 2(a) is caused by the depletion of the copper ... See full document

... AA6060 alloy, a combination of ECAP and aging treatment was ...of ECAP followed by a short aging ...after ECAP, which make the optimized condition more prone to shear localization in ... See full document

... fabricated from traditional aluminum alloys are generally welded, while the other structural components are fabricated by metal working processes such as forging, forming, rolling or ...welding process ... See full document

... aluminum alloy powders (Ref 18), due to the high number of nucleation sites induced by a deep pre- solidification undercooling (Ref ...this process to happen were not easily attained during the powder ... See full document

... The experimental range of (=G) for the sample after 8 passes, where ¼ 73166 MPa, belonged to the clime regime in Fig. 7: the horizontal line for the sample after 8 passes was not shown due to the overlapping with that of ... See full document

... Al-Si-Mg alloy is categorized as Cast Aluminum Alloy. These alloys can be sand cast, chill cast; can be grain refined as well as modified. The major alloying elements in A357 alloy are ... See full document

... hyper-eutectic Al-Si alloys such as A390 extensively used in the automotive ...the Al-Si system, Cu and Mg are commonly added as alloying elements to make these alloys heat treatable, and provide a way to ... See full document

... changes from a spheroidal shape to an irregular shape. The deformed powders also weld together to form large powder ...result from the plastic deformation during the ball ...pores from the ... See full document

... depth from the ...resulted from the significant grain refinement of ¢-phase and the solid solution effect of ¡-phase during the FSP ...2 Al precipitates (referring to the ... See full document

... attention of the research community. Post second world-war, fabrication of materials through severe plastic deformation where in fine grain structures are developed from coarse grained metals has gained ... See full document

... intermetallic phases are also drawn. Depending on the relative influence of the surrounding matrix and of the analysed particle, the data point of each particle can be located at different positions on the straight lines: ... See full document

... resulted from deformation/material conditions, for instance, ECAP channel and strain compatibility requirements by neighbor- ing grains, ...metalworking process. It is obvious that when a sample is ... See full document

... Of the late a number of research studies have been attempted to reduce the grain size to sub-micron level in metallic materials by imposing severe plastic deformation (SPD). As a result, a sub-micrometer ultra fine ... See full document

... the ECAP process, suggesting that the bending deformation instead of shearing deformation is regarded as a dominant factor governing the plastic defor- mation at that ...the ECAP process are ... See full document