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首页> 外文期刊>Intermetallics >Influence of solution heat treatment on microstructure and stress rupture properties of a Ni_3Al base single crystal superalloy IC6SX
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Influence of solution heat treatment on microstructure and stress rupture properties of a Ni_3Al base single crystal superalloy IC6SX

机译：固溶热处理对Ni_3Al基单晶高温合金IC6SX的组织和应力断裂性能的影响

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摘要

The effect of solution heat treatment at different temperatures on the microstructure and stress rupture properties of a Ni_3Al base single crystal superalloy IC6SX has been investigated in this paper. The experimental results show that the as-cast alloy exhibited a typical dendritic structure with three phases of γ', γ and NiMo. After solution heat treated at 1240 °C, the NiMo phase dissolved entirely. With the temperature increasing, the y' phase in interdendritic region dissolved earlier than that in dendritic region. When solution heat treatment temperature reached to 1280 °C, all of the y' solutioned and a uniform microstructure was observed. Furthermore, increasing the temperature up to 1340 °C, a small amount of incipient melting occurred in the alloy. The stress rupture life of IC6SX at 1100 °C/130 MPa increased with the rising of temperature and reached to the top value under the solution heat treatment temperature of 1280 °C. The optimum solution heat treatment considered to be 1280 °C/10 h followed by flowing air cooling.
机译：研究了不同温度下的固溶热处理对Ni_3Al基单晶高温合金IC6SX的组织和应力断裂性能的影响。实验结果表明，铸态合金表现出典型的树枝状结构，具有γ'，γ和NiMo的三相。在1240°C下进行固溶热处理后，NiMo相完全溶解。随着温度的升高，树突间区域的y'相比树突区域的y'相更早溶解。当固溶热处理温度达到1280℃时，所有的y′都固溶并且观察到均匀的微观结构。此外，将温度升高到1340°C，合金中发生了少量的初期熔化。 IC6SX在1100°C / 130 MPa下的应力断裂寿命随温度的升高而增加，并在1280°C的固溶热处理温度下达到最大值。最佳固溶热处理被认为是1280°C / 10 h，然后进行空气冷却。

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