激光增材制造多颗粒协同增强铝基复合材料的显微组织和力学性能研究

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Communications Pub Date : 2025-06-18 DOI:10.1016/j.coco.2025.102508

Yu Li , Chenghang Zhang , Xu Cheng , Yiliu Sun , Chunjie Shen

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引用次数: 0

摘要

随着航空航天和汽车工业对轻量化、高强、耐用结构部件的需求日益增加，颗粒增强铝基复合材料因其低密度、高比强度和优异的耐磨性而受到广泛关注。在本研究中，采用选择性激光熔化（SLM）法制备了0.5 wt% TiN +0.5 wt% Si3N4和1 wt% TiN +1 wt% Si3N4增强的铝复合材料，利用不同增强颗粒的强化效果来提高性能。在高温SLM过程中，TiN颗粒熔化并释放出Ti原子，促进了Al3（Ti, Sc, Zr）相的形成。与沉积态铝合金相比，复合材料的抗拉强度提高了415.42 MPa （0.5 wt% TiN + 0.5 wt% Si3N4）和446.63 MPa （1 wt% TiN + 1 wt% Si3N4）。强度的提高主要是由于增强颗粒引起的晶粒细化和析出硬化。

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Research on microstructure and mechanical properties of multi-particles synergistically reinforced aluminum matrix composites by laser additive manufacturing

With the increasing demand for lightweight, high-strength, and durable structural components in aerospace and automotive industries, particle-reinforced aluminum matrix composites (AMMCs) have attracted extensive attention due to their low density, high specific strength, and excellent wear resistance. In this study, aluminum composites with 0.5 wt% TiN +0.5 wt% Si₃N₄ and 1 wt% TiN +1 wt% Si₃N₄ reinforcements were fabricated using selective laser melting (SLM) to achieve improved performance, leveraging the strengthening effects of different reinforced particles. During the high-temperature SLM process, TiN particles melted and released Ti atoms, which facilitated the formation of Al₃(Ti, Sc, Zr) phase. Compared to the as-deposited aluminum alloy, the composites exhibited enhanced tensile strength of 415.42 MPa (0.5 wt% TiN + 0.5 wt% Si₃N₄) and 446.63 MPa (1 wt% TiN + 1 wt% Si₃N₄). The enhanced strength is primarily attributed to grain refinement and precipitation hardening induced by the reinforced particles.

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来源期刊

Composites Communications Materials Science-Ceramics and Composites

CiteScore

12.10

自引率

10.00%

发文量

340

审稿时长

36 days

期刊介绍： Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.