New method for fabricating 6061-7075-composite with enhanced microstructure, mechanical properties, and electrochemical resistance using additive friction stir deposition and heat treatment

IF 7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials Science and Engineering: A Pub Date : 2025-07-01 Epub Date: 2025-04-11 DOI:10.1016/j.msea.2025.148326

Q. Qiao , L. Wang , Z. Zhu , Y. Lin , K.L. Fu , H. Qian , Z. Li , D. Guo , D. Zhang , C.T. Kwok , L.M. Tam

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Abstract

Additive friction stir deposition (AFSD), a solid-state additive manufacturing (AM) technology, is widely used to develop high-performance large-scale deposits. A new 6061-7075-composite with excellent and optimally integrated characteristics was fabricated by AFSD with post-heat treatment. The analysis revealed that the heat-treated specimen (AFSD 6061 + 7075-HT) exhibited a higher precipitate fraction and greater plastic deformation than the as-fabricated specimen (AFSD 6061 + 7075). Mechanical tests confirmed that AFSD 6061 + 7075-HT exhibited a microhardness of 115 HV_0.5, yield strength of 289 MPa, ultimate tensile strength of 368 MPa, and elongation of 22 %, which were comparable to forged AA6061. Additionally, AFSD 6061 + 7075-HT demonstrated improved electrochemical resistance owing to its uniform microstructure, precipitate formation, and denser oxide layer. These findings offer valuable insights for the large-scale fabrication of Al-based composite components with superior properties.

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采用添加剂搅拌摩擦沉积和热处理制备6061-7075复合材料，提高了材料的显微组织、力学性能和耐电化学性能

添加剂搅拌摩擦沉积（AFSD）是一种固态增材制造（AM）技术，被广泛用于开发高性能的大规模镀层。采用后热处理的AFSD法制备了一种具有优异综合性能的新型6061-7075复合材料。分析结果表明，热处理试样（AFSD 6061 + 7075- ht）的析出相含量和塑性变形均高于预制试样（AFSD 6061 + 7075）。力学试验证实，AFSD 6061 + 7075-HT的显微硬度为115 HV0.5，屈服强度为289 MPa，极限抗拉强度为368 MPa，延伸率为22%，与锻造后的AA6061相当。此外，AFSD 6061 + 7075-HT由于其均匀的微观结构、沉淀形成和更致密的氧化层，表现出更好的电化学电阻。这些发现为大规模制造具有优异性能的铝基复合材料部件提供了有价值的见解。

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.