Diffusion in ultrafine-grained Al-Mg alloys

T. Fujita, H. Hasegawa, Zenji Horita, T. G. Langdon

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Abstract

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.

Original languageEnglish
Pages (from-to)1205-1210
Number of pages6
JournalDefect and Diffusion Forum
Issue number194-199 PART 2
Publication statusPublished - Jan 1 2001

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All Science Journal Classification (ASJC) codes

  • Radiation
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Fujita, T., Hasegawa, H., Horita, Z., & Langdon, T. G. (2001). Diffusion in ultrafine-grained Al-Mg alloys. Defect and Diffusion Forum, (194-199 PART 2), 1205-1210.