| Title |
The Effect of Solute zirconium on the Resistance to Annealing Processes in Al - Zr Alloys |
| Authors |
이진형(Jin Hyung Lee); 홍종휘(Jong Hwi Hong) |
| Abstract |
With the object of clarifying the heat resisting mechanism of the dilute Al-Zr alloys, the isothermal and isochronal annealing characteristics of cold drawn pure aluminum and its dilute Al-zr alloys were studied. It was shown that the high degree of thermal stability achieved in this alloys was due to the Cottrell effect produced by the soluted zirconium and the substructure which was formed by the severe plastic deformations at low temperatures. The recovery process of the alloy, which proceeded with the coalescence and growth of subgrains and the dissipation of subboundaries, was depressed by the strong binding energy between zirconium atom and edge dislocation and the low diffusivity of solute Zr in aluminum. |