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首页> 外文期刊>Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing >Effects of Sc on microstructure and low-cycle fatigue properties of Al-Li alloy
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Effects of Sc on microstructure and low-cycle fatigue properties of Al-Li alloy

机译：Sc对Al-Li合金组织和低周疲劳性能的影响

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摘要

The microstructures and low-cycle fatigue properties of Al-Li alloys with and without Sc addition were investigated. The results showed that the addition of Sc in Al-Li alloy can change its microstructure conspicuously, and improve its low-cycle fatigue properties. Sc addition to Al-Li alloy decreases the growth rate of δ' (Al_3Li) particles, and promotes the precipitation of the S' (Al_2CuMg) phase. In addition, new strengthening phases, such as Al_3Sc, Al_3Li/Al_3Sc and Al_3Li/Al_3(Sc,Zr), also precipitate in Al-Li alloy with Sc addition, which is the main reason for the improvement of the low-cycle fatigue properties of Al-Li-Sc alloy.
机译：研究了添加和不添加Sc的Al-Li合金的组织和低周疲劳性能。结果表明，在铝锂合金中添加Sc可以显着改变其显微组织，并改善其低周疲劳性能。向Al-Li合金中添加Sc会降低δ'（Al_3Li）颗粒的生长速率，并促进S'（Al_2CuMg）相的析出。另外，Al_3Sc，Al_3Li / Al_3Sc和Al_3Li / Al_3（Sc，Zr）等新的强化相也沉淀在Al-Li合金中，这是改善低周疲劳性能的主要原因。 Al-Li-Sc合金。

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