Microstructure evolution and strengthening mechanisms of spray-formed 5A12 Al alloy processed by high reduction rolling
作者： Cai-he FAN , Xi-hong CHEN , Xin-peng ZHOU , Ling OU , Jian-jun YANG
DOI: 10.1016/S1003-6326(17)60262-0
关键词:
摘要: Abstract The extrusion preform of the spray-formed 5A12 Al alloy was hot rolled using high reduction rolling technology. By means transmission electron microscopy (TEM), backscatter diffraction (EBSD) and energy dispersive spectroscopy (EDS), microstructure evolution studied strengthening toughening mechanism thereby proposed. results indicate that discontinuous continuous dynamic recrystallization occurred during deformation alloy. grain size significantly refined micro-scale grains formed. Partial leads to a significant increase dislocation density cellular structure. Mg atoms were distributed in matrix mainly presence solid solution rather than formation precipitate. High not only hindered motion increased dislocation, but also exhibited remarkable effect, which contributes strength toughness as-rolled sheets. tensile elongation spray formed at room temperature after 3 passes 622 MPa 20%, respectively.
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