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Ageing characteristics of Al-2.5% Li rapidly solidified alloy

Samuel, F. ; Champier, G.

Journal of Materials Science, 1987, Vol.22(11), pp.3851-3863 [Tạp chí có phản biện]

ISSN: 0022-2461 ; E-ISSN: 1573-4803 ; DOI: 10.1007/BF01133332

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  • Nhan đề:
    Ageing characteristics of Al-2.5% Li rapidly solidified alloy
  • Tác giả: Samuel, F. ; Champier, G.
  • Chủ đề: Specialty Metals Industry
  • Là 1 phần của: Journal of Materials Science, 1987, Vol.22(11), pp.3851-3863
  • Mô tả: The present work was performed on an Al−2.5 wt% Li alloy produced by melt spinning. The ribbons were aged in the temperature range 180 to 310° C for times between 1 min and 120h. The kinetics of coarsening of σ′(Al 3 Li) and σ (AlLi) phase particles were investigated using transmission electron microscopy and hardness measurements. The results show that coarsening of σ′(Al 3 Li) follows a simple linear relation with the cube root of Me, whereas coarsening of σ(AlLi) does not follow the same trend. We believe that the σ(AlLi) phase nucleates at the σ′(Al 3 Li)/matrix interface and grows by the dissolution of the nearby σ′(Al 3 Li) particles. The mechanical properties of the powder metallurgy alloy show that a large volume fraction of PFZ contributes to the alloy ductility, ∼ 11 %, in the aged condition. Also, the yield strength is greatly improved due to refinement effects enhanced by rapid solidification.
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0022-2461 ; E-ISSN: 1573-4803 ; DOI: 10.1007/BF01133332

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