Synergistic enhancement of corrosion resistance and mechanical properties in L-PBFed TiB2/AlCuMg composite via solution heat treatment

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2025-04-22 DOI:10.1016/j.corsci.2025.112970

Tengteng Sun , Jierui Mu , Qiang Lu , Yi Wu , Zijue Tang , Hua Sun , Mingliang Wang , Haowei Wang , Hongze Wang

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引用次数: 0

Abstract

The development of additive-manufactured (AMed) aluminum alloys with a balance of high mechanical strength and excellent corrosion resistance remains a critical objective for lightweight structural applications in marine and aerospace industries. However, the majority of AMed aluminum alloys are characterized by coarse columnar grains and inhomogeneous phase distributions, which intensify galvanic effects and severely compromise their corrosion resistance. In this study, grain refinement and solution heat treatment are applied in in-situ TiB₂ nanoparticles modified AMed AlCuMg alloy to overcome these limitations. The resultant composites exhibited a remarkable strength-ductility product of 4619 MPa% (85-fold improvement) with an elongation of 8.9 %, alongside a 76.7 % reduction in corrosion current density, demonstrating superior overall performance compared to previously reported aluminum alloys and composites. Detailed investigations revealed that the uniform distribution of refined grains not only enhanced grain boundary strengthening but also improved the stability of passivation films. Notably, solution heat treatment, in contrast to solution-aging treatment, effectively reduced the overall cathodic effect and provided significant solid-solution strengthening to the aluminum matrix by diminishing the primary phase. These findings hold promises for exploring next-generation aluminum matrix composites with enhanced overall performance.

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固溶热处理协同增强L-PBFed TiB2/AlCuMg复合材料的耐蚀性和力学性能

开发具有高机械强度和优异耐腐蚀性平衡的增材制造（AMed）铝合金仍然是船舶和航空航天工业轻量化结构应用的关键目标。然而，大多数AMed铝合金的特点是粗柱状晶粒和相分布不均匀，这加剧了电偶效应，严重影响了其耐腐蚀性。在本研究中，采用晶粒细化和固溶热处理的方法对原位TiB2纳米颗粒修饰的AMed AlCuMg合金进行了改进。复合材料的强度延展性达到了4619 MPa%（提高了85倍），伸长率达到了8.9 %，腐蚀电流密度降低了76.7 %，与之前报道的铝合金和复合材料相比，整体性能优越。细化晶粒的均匀分布不仅增强了晶界强化，而且提高了钝化膜的稳定性。值得注意的是，与固溶时效处理相比，固溶热处理有效地降低了整体阴极效应，并通过减少初生相对铝基体提供了显著的固溶强化。这些发现为探索整体性能增强的下一代铝基复合材料带来了希望。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.