The γ to γ transition in Fe-Cr-Ni alloys during laser treatment

• Fukumoto Shigeo

  Department of Materials, Swiss Federal Institute of Technology Lausanne (EPFL)

• Kurz Wilfried

  Department of Materials, Swiss Federal Institute of Technology Lausanne (EPFL)

書誌事項

タイトル別名

• The .DELTA. to .GAMMA. Transition in Fe-Cr-Ni Alloys during Laser Treatment.

抄録

Laser remelting experiments have been performed with Fe-18%Cr-Ni alloys to evaluate the effects of composition (Cr/Ni ratios between 1.30 and 1.83) and growth velocity (0.9 to 50 mm/s) on the microstructure selection during solidification between primary δ-ferrite and primary γ-austenite. The experimental results are compared with theoretical predictions from a dendrite growth model. The experimental transitions from ferrite to austenite are in good agreement with theory for both an increase in Ni content and increase in growth rate. The transitions from austenite to ferrite are found to occur at lower Ni contents than predicted. It is thought that the δ-γ transition shows no nucleation barrier and is controlled by dendrite growth kinetics and the γ-δ transition is controlled by nucleation of ferrite.

収録刊行物

• ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ

  ＩＳＩＪ　Ｉｎｔｅｒｎａｔｉｏｎａｌ 37 (7), 677-684, 1997

  一般社団法人 日本鉄鋼協会

キーワード

• dendrite growth
• microstructure selection
• laser treatment
• laser welding
• Fe-Cr-Ni ternary alloy
• ferrite-austenite formation

詳細情報

• CRID: 1390001206452561152
• NII論文ID: 10002456306
• NII書誌ID: AA10680712
• DOI: 10.2355/isijinternational.37.677
• COI: 1:CAS:528:DyaK2sXlsFWmtro%3D
• ISSN: 13475460
• ISSN: 09151559
• ISSN: http://id.crossref.org/issn/09151559
• Web Site: http://www.jstage.jst.go.jp/article/isijinternational1989/37/7/37_7_677/_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