Abstract
Abstract: The structure and characteristics of aluminum-base sub-grade alloys with cereals micro-structure susceptible to severe plastic deformations (ECA pressing). Before and after the ECA pressure therapy, the structures and the characteristics of alloys 7050 and 2224 have been investigated in detail. With a fault elongation of 15 percent, the ultimate tensile power for the 7050 alloy was 677 MPa, whereas the 2224 alloy showed 618MPal with a fault elongation of 12 percent. Direct screening and recrystallization of bands in specific strains and rinsing systems resulted in finer cereal growth under the pressure of ECA. All improvements to grain refinement, dislocation reinforcement and precipitation were discussed in this Article more evenly and finely than the conventional T6 alloy. The development of fine grains has two explanations. One is that the ground grain is directly cut into fine grain with low angle limits by different bands. A further explanation is the development of high-angle recrystallized grains. Keywords: Ultimate Tensile Strength (UTS), ultra-finite-grains (UFGs), Transmission Electron Microscope (TEM),fault elongation, Recrystallized.
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