Identification of Metastable Rod-Like Particles in an Isothermally Aged Al–10Mg–0.5Ag (mass%) Alloy

• Kubota Masahiro

  School of Physics and Materials Engineering

• Nie Jian Feng

  School of Physics and Materials Engineering

• Muddle Barry C.

  School of Physics and Materials Engineering

書誌事項

タイトル別名

• Identification of Metastable Rod-Like Particles in an Isothermally Aged Al–10Mg–0.5Ag (mass%) Alloy
• Identification of Metastable Rod Like Particles in an Isothermally Aged Al 10Mg 0 5Ag massパーセント Alloy

抄録

The structure and morphology of a precipitation product in an Al–10Mg–0.5Ag (mass%) alloy aged isothermally at 240°C have been characterised using transmission electron microscopy and microbeam electron diffraction. A metastable T phase (Mg₃₂(Al, Ag)₄₉, b.c.c., a=1.41 nm) which is identified by the electron microdiffraction patterns, has been found in the Al–10Mg–0.5Ag (mass%) alloy after solution treatment, water quenched and then aged for 2 h at 240°C. The orientation relationship between the T phase and matrix α-Al phase was of the form (010)_T||(11\\bar1)_α and [001]_T||[1\\bar10]_α. Qualitative microanalysis suggested that the metastable crystalline T phase was a ternary compound that contained all three elements Al, Mg and Ag. The morphology of the metastable T phase is the ⟨110⟩_α rod-like in shape and those precipitate particles are homogeneously nucleated, and finely and uniformly dispersed in the Al matrix. The icosahedral quasicrystalline phase was observed in the early stages of ageing (0.5 h at 240°C), and it was to be replaced by the metastable crystalline T phase Mg₃₂(Al, Ag)₄₉ after the alloy is aged for 2 h at 240°C. The T phase formed as faceted rods parallel to ⟨110⟩_α directions of the α-Al matrix appeared to be the primary strengthening constitute exhibiting maximum hardness in the Al–10Mg–0.5Ag (mass%) alloy aged at 240°C.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 46 (6), 1288-1294, 2005

  公益社団法人 日本金属学会

キーワード

• precipitation hardening
• aluminium-magnesium-silver
• microstuctural characterization
• <I>T</I> phase
• Mg<SUB>32</SUB>(Al
• Ag)<SUB>49</SUB>

詳細情報

• CRID: 1390282679228265344
• NII論文ID: 130004452849
• NII論文ID: 10016438951
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.46.1288
• COI: 1:CAS:528:DC%2BD2MXosVensb0%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 7343668
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7343668
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/46/6/46_6_1288/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可