ニッケル基単結晶合金CMSX-2の多軸クリープ異方性 : 第2報, 三次元有限要素解析による検討

概要

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Combined tension-torsion creep of nickel-base single-crystal thin-walled tubular specimens, in which [001] is oriented in the axial direction, is analyzed using the 3D finite-element method. A crystal creep equation of the power-law type for steady-state creep is implemented in the analysis. Features in distributions of stress and strain rate in the specimens of long and short gate-length types are discussed so as to give foundations to the 2D models of simplified analysis formulated in the 1st report. Comparisons between the 3D finite-element and 2D simplified analyses are made with respect to overall tensile and torsional strain rates of the specimens. Effects of the deviation of [001] from the axial direction are also discussed. Consequently the finding on active slip systems obtained by use of the 2D models in the 1st report is ascertained on the basis of the 3D finite-element analysis.
1992-12-25