Long-Term Creep Properties of Hastelloy XR in Simulated High-Temperature Gas-Cooled Reactor Helium.

• KURATA Yuji

  Japan Atomic Energy Research Institute

• OGAWA Yutaka

  Japan Atomic Energy Research Institute The Oarai Branch, Inst. for Mater. Res., Tohoku University

• SUZUKI Tomio

  Japan Atomic Energy Research Institute

• SHINDO Masami

  Japan Atomic Energy Research Institute

• NAKAJIMA Hajime

  Japan Atomic Energy Research Institute

• KONDO Tatsuo

  Japan Atomic Energy Research Institute Faculty of Engineering, Tohoku University

抄録

Creep tests of Hastelloy XR (a modified version of the conventional Hastelloy X) were carried out in simulated high-temperature gas-cooled reactor (HTGR) helium at 800, 900 and 1, 000°C. The test results up to about 50, 000h showed no significant degradation in creep properties. The creep-rupture strength obtained through long-term tests was above the level corresponding to the design allowable creep-rupture stress of the High-Temperature Engineering Test Reactor. The values of the stress exponent were 4.5 to 5.7 when the stress dependence of the steady-state creep rate was expressed in terms of the Norton equation. It is judged that dominant creep process is dislocation creep. Rupture lives could be estimated with sufficient accuracy using Larson-Miller parameter. Carburization during creep in simulated HTGR helium did not degrade creep properties of Hastelloy XR. Internally formed cracks were initiated at sites of precipitates at grain boundaries, growing nearly perpendicular to the stress axis. Two phases, Cr-rich carbide and Mo-rich carbide, co-existed in specimens after long-term creep tests.

収録刊行物

• Ｊｏｕｒｎａｌ　ｏｆ　Ｎｕｃｌｅａｒ　Ｓｃｉｅｎｃｅ　ａｎｄ　Ｔｅｃｈｎｏｌｏｇｙ（日本原子力学会英文論文誌）

  Ｊｏｕｒｎａｌ　ｏｆ　Ｎｕｃｌｅａｒ　Ｓｃｉｅｎｃｅ　ａｎｄ　Ｔｅｃｈｎｏｌｏｇｙ（日本原子力学会英文論文誌） 32 (11), 1108-1117, 1995

  一般社団法人 日本原子力学会

キーワード

• Hastelloy XR
• creep
• helium atmosphere
• HTTR
• rupture life
• rupture ductility
• steady-state creep rate
• design allowable stress
• Norton equation
• Larson-Miller parameter
• carburization
• grain boundary
• precipitates
• carbides

詳細情報

• CRID: 1390282679072842880
• NII論文ID: 10002073551
• NII書誌ID: AA00703720
• DOI: 10.3327/jnst.32.1108
• COI: 1:CAS:528:DyaK28XltVar
• ISSN: 18811248
• ISSN: 00223131
• 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