Depth Profile of Nitrogen and Oxygen absorbed in HAZ of ZrTN802D Alloy Tube by TIG Welding in Various Atmospheres (Report 1).

• KOMURO Kojiro

  J.N.F. Service Engineering Co., Ltd.

• MISHIMA Teruaki

  Japan Nuclear Fuel Co., Ltd.

• KUROSAWA Satoshi

  Japan Nuclear Fuel Co., Ltd.

• TSUBOI Hajime

  Japan Nuclear Fuel Co., Ltd.

抄録

Investigations were made on the depth profiles of nitrogen (N) and oxygen (O) absorbed in HAZ of ZrTN802D alloy (Zircaloy-2) tubes relative to the microstructure changes by TIG welding in the atmospheres with extremely low level of N₂ and O₂ partial pressures in total pressures of 0.10 and 0.32 MPa.<BR>The original fine microstructures of cold worked and heat treated ZrTN802D alloy tubes were changed by transformation in the HAZ heated to α+β and β phase temperature ranges (1, 090-2, 113 K), and the regions microstructurally changed by welding at 0.32 MPa were narrower than those welded at 0.10 MPa.<BR>By the measuring of secondary ion intensities of ⁹⁰Zr¹⁴N- and ¹⁸O- using SIMS continuously from surface into deeper portion in HAZ, it was made clear that N was absorbed and diffused at the portion heated to α+β and β phase temperature ranges therein and the content of N decreased exponentially toward inside. O was absorbed more at the portion heated within a phase temperature range (<1, 090 K) in HAZ rather than that of β phase range in HAZ and O was diffused thereinto within only a few μm in depth.

収録刊行物

• 溶接学会論文集

  溶接学会論文集 13 (4), 491-499, 1995

  一般社団法人 溶接学会

キーワード

• TIG welding
• Zr alloy
• Weld heat affected zone
• Nitrogen absorption
• Oxygen absorption

詳細情報

• CRID: 1390001204724195712
• NII論文ID: 130003764468
• DOI: 10.2207/qjjws.13.491
• ISSN: 24348252
• ISSN: 02884771
• 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