Microstructures of rapidly solidified aluminum alloys
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Al-Fe, Al-Sn, Al-Cu, Al-Zn and Al-Zr binary alloys of various concentrations were rapidly solidified from melt into foil form. The microstructures of these alloys were studied with respect to the origin and arrangement of dislocations.Cell boundaries could be classified into three types with respect to the dislocation arrangement as reported in our previous work4); and a new type was found in Al-Sn alloys.The origin of dislocations could be explained by the theory that it would be resulted from the constitutional stress on the cell boundaries due to solute segregation. Consequently, the highest dislocation density was found in the alloys, where the difference of atomic radii between solvent and solute atoms was great and the difference of solute concentrations between on the boundary and in the interior of cells was also great. The second mechanism for the origin of dislocations would be prismatic punching, which was observed at large secondary phase particles.
- 一般社団法人 軽金属学会の論文
一般社団法人 軽金属学会 | 論文
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