SB-10-2(015) CREEP BEHAVIOR OF Ir-Nb AND Ir-Zr REFRACTORY SUPERALLOYS(Creep Deformation and Fracture of Superalloys)

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概要

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• The microstructure stability and creep properties of Ir-base refractory superalloys (It-Nb and Ir-Zr) with an fcc and L1_2 two-phase structure were investigated. An orderly arrayed structure composed of cuboidal coherent L1_2 precipitates was observed in the Ir-Nb alloys. By a different heat treatment, a maze structure and a discontinuous coarsened lamellar structure were obtained in the Ir-Zr alloys. Creep behavior was investigated for samples with these three kinds of microstructure between 1500 and 1800℃. The creep behavior was explained according to microstructural changes before and after creep.

• 一般社団法人日本機械学会の論文
• 2001-06-03

著者

• Yamabe-mitarai Y.

  National Research Institute For Metals

• HARADA H.

  National Research Institute for Metals

• Nakazawa S.

  National Research Institute for Metals

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