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首页> 外文期刊>Metals >Effect of Cooling Rate on Microstructure and Grain Refining Behavior of In Situ CeB 6 /Al Composite Inoculant in Aluminum
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Effect of Cooling Rate on Microstructure and Grain Refining Behavior of In Situ CeB 6 /Al Composite Inoculant in Aluminum

机译：冷却速率对铝中原位CeB 6 / Al复合孕育剂的组织和晶粒细化行为的影响

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Melt spinning was performed to process an in situ CeB 6 /Al inoculant at different rotating speeds to investigate the influence of cooling rate on the grain refining behavior of inoculants. It has been found that a high cooling rate caused two obvious changes in the inoculant: the supersaturated solid solution of Ce in the α-Al matrix and the miniaturization of CeB 6 particles. At high cooling rates of ~10 8 K/s, the Ce content is largely beyond the theoretical solid solubility of Ce in Al, and the size of the CeB 6 particles in ribbons is reduced to ~100 nm. The grain refining effect of melt-spun CeB 6 /Al composite inoculant shows significant dependence on holding time of which the best value should be no more than 2 min. The excellent grain refinement of the inoculant can be attributed to the combined effect of the nano-sized refiner particles and the large undercooling caused by the sudden melting of supersaturated Al–Ce solution.
机译：进行熔体纺丝以不同转速处理原位CeB 6 / Al孕育剂，以研究冷却速率对孕育剂晶粒细化行为的影响。已经发现，较高的冷却速度导致孕育剂发生两个明显的变化：α-Al基体中Ce的过饱和固溶体和CeB 6颗粒的小型化。在约10 8 K / s的高冷却速率下，Ce含量大大超出了Ce在Al中的理论固溶度，并且带中CeB 6颗粒的尺寸减小到了约100 nm。熔纺CeB 6 / Al复合孕育剂的晶粒细化效果显示出对保持时间的显着依赖性，其保持时间的最佳值应不超过2分钟。孕育剂的出色晶粒细化可以归因于纳米级细化剂颗粒的综合作用以及过饱和Al-Ce溶液的突然熔化导致的过大过冷。

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