Microstructural Changes in an Aged Cu-15.0 at%Sn Shape Memory Alloy

• Kuwano N.

  Department of Metallurgy and Mining Engineering, University of Illinois

• Wayman C. M.

  Department of Metallurgy and Mining Engineering, University of Illinois

抄録

Microstructural changes were studied by means of electron microscopy for a Cu-15.0 at%Sn alloy aged at 373 K or 323 K. The as-quenched alloy was confirmed to consist of many small domains of an ω-like phase (designated as the s-phase) and a DO₃ matrix. It was observed that in the alloy aged at 373 K another phase (designated as the L-phase) precipitates preferentially on dislocations and coarsens to larger than 0.2 μm in diameter. In the alloy aged at 323 K the L-phase was formed, but then decomposed into small irregular segments upon subsequent aging. After aging below 323 K for a prolonged time, both the s- and L-phases underwent alteration to a transitional phase which showed additional extra diffraction spots. The precipitation of the L-phase is believed to be responsible for the decrease in the martensite transformation temperature (M_s) upon aging.

収録刊行物

• Transactions of the Japan Institute of Metals

  Transactions of the Japan Institute of Metals 24 (7), 504-509, 1983

  社団法人 日本金属学会

キーワード

• copper tin alloy
• shape memory
• martensite transformation temperature
• aging effect
• electron microscopy
• precipitation

詳細情報

• CRID: 1390282680095386752
• NII論文ID: 130003486085
• DOI: 10.2320/matertrans1960.24.504
• COI: 1:CAS:528:DyaL3sXlsVCgurw%3D
• ISSN: 24324701
• ISSN: 00214434
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1960/24/7/24_7_504/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可