Clarifying the mechanism of superheating effect and using it to enhance the ductility of cast Al-Si alloys via refining both Si and Al phase

阐明过热效应的机理并通过细化 Si 和 Al 相来提高铸造 Al-Si 合金的延展性

• 批准号: 21K14432
• 负责人: 卞 華康
• 金额: $ 2.41万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Early-Career Scientists
• 财政年份: 2021
• 资助国家: 日本
• 起止时间: 2021-04-01 至 2022-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-21K14432/
• 关键词: Superheating; AlSI alloy; EBM; Additive manufactuing; Al-Si; refining

Recently, a high tensile ductility upto 33% at room temperature in AlSi10Mg alloy has been obtained via refining both the Si and Al microstructure based on the superheating effect during electron beam melting (EBM) manufacturing. Thus, the microstructure of cast Al-Si alloys (including Al-Si10, Al-Si20, and Al-Si30 alloys) is expected to be refined to enhance both the ductility and strength using this superheating effect.By now, the mechanism of superheating effect for refining the microstructure of Al-Si alloy using EBM building process has been investigated. The higher temperature inner melting pool and the fast-cooling rate make the homogeneous melt liquid inner melt pool. During the cooling process especially when the temperature is decreased to 1300-1000 ℃, the Al and Si nanocluster occurred and form the fine grains in the solidification. Beside that, the single bead experiment on the surface of Al10Si, Al20Si and Al30Si have been conducted. The microstructure observation showed that EBM single bead could refine the microstructure in AlSi10 and AlSi20 alloy, but only can remelt part of the Al matrix in AlSi30 alloy.

最近，通过基于电子束熔化（EBM）制造过程中的过热效果来改进Si和Al微结构，在室温下，ALSI10MG合金的高抗拉伸性高达33％。这是预计将精制的铸造Al-Si合金（包括Al-Si10，Al-Si20和Al-Si30合金）的微观结构可以通过这种过热效果来提高延展性和强度。较高的温度内部熔化池和快速冷却速率使均匀的熔体液体内部熔体池。在冷却过程中，尤其是当温度降至1300-1000℃时，发生了AL和SI纳米簇，并在凝固中形成细晶粒。除此之外，还进行了AL10SI，AL20SI和AL30SI表面的单珠实验。微观结构观察表明，EBM单珠可以完善ALSI10和ALSI20合金中的微结构，但只能记住AlSI30合金中Al矩阵的一部分。

项目成果

The influence of superheating on the microstructure of cast Al-Si alloy

过热度对铸造铝硅合金显微组织的影响

• 发表时间: 2021
• 作者: Huakang Bian;Kenta Aoyagi;Kenta;Yamanaka;Akihiko Chiba
• 通讯作者: Akihiko Chiba

Microstructure evolution of cast Al-Si alloy under superheated melted condition via electron beam melting

电子束熔炼铸造铝硅合金过热熔化状态下的显微组织演化

• 发表时间: 2022
• 作者: Huakang Bian;Kenta Aoyagi;Kenta;Yamanaka;Akihiko Chiba
• 通讯作者: Akihiko Chiba