| 摘要 |
PROBLEM TO BE SOLVED: To reduce the thermal stress generated on a section in parallel with a code direction in addition to the stress in a span direction, and to improve the material allowable value, by allowing three orthogonal crystalline axes to coincide with the directions of three main stress respectively within a specific value in an area where the maximum stress is generated. SOLUTION: Since a monocrystalline heat-proof alloy has a cubic system, it has three orthogonal crystalline axes. The directions of three crystalline axes are represented by the vectors <100>, <010>, <001>. A z-axis direction is allowed to coincide with <001>. The other two axes are in parallel with a code direction. The relationship between two axes and a blade section 2 in the code direction has eight symmetry axes in phase, because two axes are exchangeable. All phase relationship can be represented by the phase relationship of 0 deg.-45 deg. when the initial position relationship is 0 deg.. Further on a position where the maximum stress of a component in the code direction, of the generated stress, is generated, a direction of the vertical stress is allowed to coincide with one of three transverse crystalline axes within±5 deg. in maximum.
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