Enhancement of strength-plasticity matching in multimodal grained (SiCnp + GNS)/Al composites

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-04-07 DOI:10.1016/j.compositesa.2025.108926

Jiajia Zhang, Mingfang Qian, Xuexi Zhang, Aibin Li, Lin Geng

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Abstract

To address the strength-plasticity inversion in conventional Al matrix composites (AMCs), two strategies—hybrid reinforcement and heterogeneous configuration—have been proposed. However, excessive reinforcements in hybrid composites can lead to cracking, while coarse grains in heterogeneous composites improve plasticity but reduce strength. This study combines hybrid reinforcement with heterogeneous configurations for fine structural design of multimodal grained composites using a zonal ball milling process. The reinforcements were selected and the zonal ball milling process was tuned to create three grain zones: (1) nano grain zones enriched with hard SiCnp from high-energy ball milling, (2) submicron grain zones uniformly dispersed by flexible GNS as a transition, and (3) micro grain zones primarily composed of pure Al. The multimodal grained (SiCnp + GNS)/Al composites were produced with grain zone ratios of 35:35:30 and 40:40:20. Results showed that the size and distribution of nano grain zones significantly influenced the strengthening effect of the heterogeneous composites. Com40-40-20 exhibited strong bonding between grain zones, enhancing strain compatibility. Compared to homogeneous (SiCnp + GNS)/Al, Com40-40-20 demonstrated approximately 122 % improved plasticity and about 12 % increased strength without any loss. This refined grain zone design offers valuable insights for optimizing high-performance heterogeneous Al matrix composites.

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增强多模态晶粒(SiCnp + GNS)/Al复合材料强度塑性匹配

为了解决常规铝基复合材料的强度塑性反转问题，提出了混合增强和异质构形两种策略。然而，混杂复合材料中过量的增强会导致开裂，而非均相复合材料中粗大的晶粒提高了塑性，但降低了强度。本研究将混合增强与非均质配置相结合，采用区域球磨工艺对多模态晶粒复合材料进行精细结构设计。选择增强剂，调整区域球磨工艺，形成3个晶粒区：(1)高能球磨中富含硬SiCnp的纳米晶粒区，(2)柔性GNS作为过渡均匀分散的亚微米晶粒区，(3)主要由纯Al组成的微观晶粒区。制备出晶粒比为35:35 5:30和40:40:20的多模态晶(SiCnp + GNS)/Al复合材料。结果表明，纳米晶粒带的大小和分布对非均相复合材料的强化效果有显著影响。Com40-40-20表现出较强的晶界结合，增强了应变相容性。与均相(SiCnp + GNS)/Al相比，Com40-40-20在没有任何损失的情况下，塑性提高了122%，强度提高了12%。这种细化晶粒区设计为优化高性能非均相铝基复合材料提供了有价值的见解。

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.