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- W622529042 abstract "The stress-strain behaviour of fuel-cell reformer tubes used in a creep-fatigue condition was analyzed by a finite element method. By applying Manson's strain-range-partitioning method to the stress-strain hysteresis loop obtained in this analysis, the fatigue life was estimated for the tubes made of low C-HP-Nb (0.15C-25Cr-35Ni-Nb steel) and HP-BST-M (0.49C-25Cr-35Ni-Nb-Ti steel), which have excellent creep-fatigue properties. Also, the cost efficiency (life/cost) was compared between these materials and a low cost alloy, HK40 (25Cr-20Ni steel). The main results obtained are as follows;(1) The plastic strain range, Δεp, is negligibly small in these tubes. Therefore, the total strain range, Δεt, is nearly equal to the sum of the elastic and creep strain ranges, Δεe+Δεc.(2) The total strain range, Δεt, is almost constant for a variety of creep constitutive equations. The creep strain range, Δεc, therefore, can be decreased by using materials with high creep strength, such as HP-BST-M.(3) A longer tube life can be expected by using HP-BST-M because of its smaller Δεc and better Δεij-Nij properties than low C-HP-Nb.(4) The HP-BST-M is more cost-efficient than low cost HK40." @default.
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- W622529042 date "1989-01-01" @default.
- W622529042 modified "2023-09-27" @default.
- W622529042 title "Creep-fatigue life analysis of fuel-cell reformer tube by finite element method." @default.
- W622529042 doi "https://doi.org/10.2472/jsms.38.154" @default.
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