Grain sizes of less than 1 μm were produced in Al-0.2%Sc (or 0.2%Zr) and Al-3%Mg-0.2%Sc (or 0.2%Zr) alloys using the technique of equal-channel angular pressing (ECAP). These alloys were coupled and they were subjected to diffusion annealing at a temperature in the range of 523 to 773 K. Interdiffusion coefficients were determined from the concentration gradients measured across the interface and a comparison was made with those of coarse-grained diffusion couples. Interdiffusion coefficients of the fine-grained couples are significantly higher than those of the coarse-grained couples at lower annealing temperatures. Grain boundary diffusion coefficients of Mg in Al were deduced from the measurements.
|Number of pages||6|
|Journal||Defect and Diffusion Forum|
|Issue number||194-199 PART 2|
|Publication status||Published - Jan 1 2001|
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics