High Strength Al–Ti–Fe Alloys Consisting of Amorphous and fcc-Al Phases Prepared by Rapid Solidification

• Kimura Hisamichi

  Institute for Materials Research, Tohoku University

• Sasamori Kenichiro

  Institute for Materials Research, Tohoku University

• Inoue Akihisa

  Institute for Materials Research, Tohoku University

書誌事項

タイトル別名

• High Strength Al–Ti–Fe Alloys Consisting of Amorphous and fcc-Al Phases Prepared by Rapid Solidification
• High Strength Al Ti Fe Alloys Consistin

抄録

Coexistent of amorphous and fcc-Al phases were formed in rapidly solidified Al_98−xTi_xFe₂ (x=3, 5 and 8 at%) alloys. The structure consists of equiaxed Al grains embedded in the network of an amorphous phase. The grain size of the Al phase is 20 to 30 nm and the interparticle spacing is about 7 nm for the Al₉₃Ti₅Fe₂ alloy. The volume fraction of the Al phase is evaluated to be 70 to 80%. The mixed structure is presumably formed through the solidification process of liquid→primary fcc-Al+remaining liquid→Al+amorphous phases. The further increase in Ti content to 10 at% causes the formation of an amorphous single phase. The crystallization temperature (T_x) of the amorphous phase increases from 641 to 701 K with increasing Ti content from 3 to 10%. It is to be noticed that the T_x values are much higher than that (\fallingdotseq573 K) for Al–TM–Ln (TM=transition metal, Ln=lanthanide metal) amorphous alloys because of the low diffusivity of Ti. The mixed phase alloys have good bending ductility and exhibit the highest tensile strength (σ_f) of 1200 MPa for Al₉₃Ti₅Fe₂. The ductility decreases with further increasing Ti content because of the transition from ductile to brittle nature for the amorphous phase and no high tensile strength exceeding 500 MPa is obtained for the amorphous single phase alloy. The formation of the finely mixed amorphous and Al phases with high σ_f and T_x values is important for the future development of Al-rich Al–Ti based alloys with high specific strength.

収録刊行物

• Materials Transactions, JIM

  Materials Transactions, JIM 37 (11), 1722-1725, 1996

  社団法人 日本金属学会

キーワード

• high-strength aluminum base alloy
• nanogranular aluminum phase
• nanoscale mixed structure
• amorphous network phase
• low diffusivity
• high crystallization temperature

詳細情報

• CRID: 1390282679225048576
• NII論文ID: 130003556600
• NII論文ID: 10002451122
• NII書誌ID: AA10699969
• DOI: 10.2320/matertrans1989.37.1722
• COI: 1:CAS:528:DyaK2sXntFKmtw%3D%3D
• ISSN: 2432471X
• ISSN: 09161821
• NDL書誌ID: 4090720
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4090720
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1989/37/11/37_11_1722/_pdf
• 本文言語コード: en
• データソース種別:
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  • Crossref
  • CiNii Articles
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