通过3D打印和热挤压制备一种具有互穿结构的铝基复合材料

林育林; 王迪; 杨超; 张卫文; 王智

doi:10.1007/s12613-022-2543-z

Volume 30 Issue 4

Apr. 2023

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文章导航 > 矿物冶金与材料学报（英文） > 2023 > 30(4): 678-688

Yulin Lin, Di Wang, Chao Yang, Weiwen Zhang, and Zhi Wang, An Al–Al interpenetrating-phase composite by 3D printing and hot extrusion, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 678-688. https://doi.org/10.1007/s12613-022-2543-z

Cite this article as:

Yulin Lin, Di Wang, Chao Yang, Weiwen Zhang, and Zhi Wang, An Al–Al interpenetrating-phase composite by 3D printing and hot extrusion, Int. J. Miner. Metall. Mater., 30(2023), No. 4, pp. 678-688. https://doi.org/10.1007/s12613-022-2543-z

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研究论文

通过3D打印和热挤压制备一种具有互穿结构的铝基复合材料

1)
华南理工大学机械与汽车工程学院，广州 510000，中国
2)
华南理工大学国家金属材料近净成形工程技术研究中心，广州 510000，中国

通讯作者:
王迪 E-mail: mewdlaser@scut.edu.cn

王智 E-mail: wangzhi@scut.edu.cn

中文摘要

通过Al–Mg–Mn–Sc–Zr点阵结构与Al₈₄Ni₇Gd₆Co₃纳米结构相结合制备Al–Al互穿相复合材料。采用选择性激光熔化法制备点阵结构，随后在晶格中填充Al₈₄Ni₇Gd₆Co₃非晶粉末，最后采用热挤压制备成形复合材料。结果表明：热挤压过程中元素扩散和塑性变形使复合材料致密化，界面结合良好；样品呈均匀的非均相结构，主要由平均晶粒尺寸小于1 μm的蜂窝状点阵结构和含有大量纳米金属间化合物和纳米晶粒α-Al的纳米结构区组成。非均质结构形成硬区和软区双峰力学区，具有较高的强度和可接受的塑性，其中抗压屈服强度和抗压塑性分别可达~745 MPa和~30%。高强度可以用混合、晶界强化和背应力的规律来解释，而可接受的塑性主要是由于纳米结构区域的约束作用延缓了脆性断裂行为。

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Research Article

An Al–Al interpenetrating-phase composite by 3D printing and hot extrusion

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Abstract

Abstract

We report a process route to fabricate an Al–Al interpenetrating-phase composite by combining the Al–Mg–Mn–Sc–Zr lattice structure and Al₈₄Ni₇Gd₆Co₃ nanostructured structure. The lattice structure was produced by the selective laser melting and subsequently filled with the Al₈₄Ni₇Gd₆Co₃ amorphous powder, and finally the mixture was used for hot extrusion to produce bulk samples. The results show that the composites achieve a high densification and good interface bonding due to the element diffusion and plastic deformation during hot extrusion. The bulk samples show a heterogeneous structure with a combination of honeycomb lattice structure with an average grain size of less than 1 µm and nanostructured area with a high volume fraction of nanometric intermetallics and nanograin α-Al. The heterogeneous structure leads to a bimodal mechanical zone with hard area and soft area giving rise to high strength and acceptable plasticity, where the compressive yield strength and the compressive plasticity can reach ~745 MPa and ~30%, respectively. The high strength can be explained by the rule of mixture, the grain boundary strengthening, and the back stress, while the acceptable plasticity is mainly owing to the confinement effect of the nanostructured area retarding the brittle fracture behavior.
- Al-based composites;
- heterogeneous structure;
- additive manufacturing;
- mechanical properties

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通过3D打印和热挤压制备一种具有互穿结构的铝基复合材料

中文摘要

An Al–Al interpenetrating-phase composite by 3D printing and hot extrusion

Abstract

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