Microstructure, interfacial reaction behavior, and mechanical properties of Ti3AlC2 reinforced Al6061 composites

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2024-09-01 DOI:10.1016/S1003-6326(24)66574-X

Zhi-bin LIU , Jia-bao BAO , Wen-jie HU , Hong YAN

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引用次数: 0

Abstract

The interfacial reaction behavior of Al and Ti₃AlC₂ at different pouring temperatures and its effect on the microstructure and mechanical properties of the composites were investigated. The results show that the addition of 3.0 wt.% Ti₃AlC₂ refines the average grain size of α(Al) in the composite by 50.1% compared to Al6061 alloy. Morphological analyses indicate that an in-situ Al₃Ti transition layer of ~180 nm in thickness is generated around the edge of Ti₃AlC₂ at 720 °C, forming a well-bonded Al−Al₃Ti interface. At this processing temperature, the ultimate tensile strength of Al6061−3.0 wt.%Ti₃AlC₂ composite is 199.2 MPa, an improvement of 41.5% over the Al6061 matrix. Mechanism analyses further elucidate that 720 °C is favourable for forming the nano-sized transition layer at the Ti₃AlC₂ edges. And, the thermal mismatch strengthening plays a dominant role in this state, with a strengthening contribution of about 74.8%.

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Ti3AlC2 增强 Al6061 复合材料的微观结构、界面反应行为和力学性能

研究了不同浇注温度下 Al 和 Ti3AlC2 的界面反应行为及其对复合材料微观结构和机械性能的影响。结果表明，与 Al6061 合金相比，添加 3.0 wt.% Ti3AlC2 可使复合材料中 α(Al)的平均晶粒尺寸细化 50.1%。形态学分析表明，在 720 °C 时，Ti3AlC2 边缘周围产生了厚度约为 180 nm 的原位 Al3Ti 过渡层，形成了结合良好的 Al-Al3Ti 界面。在此加工温度下，Al6061-3.0 wt.%Ti3AlC2 复合材料的极限拉伸强度为 199.2 MPa，比 Al6061 基体提高了 41.5%。机理分析进一步阐明了 720 °C 有利于在 Ti3AlC2 边缘形成纳米级过渡层。而且，热错配强化在这种状态下起着主导作用，强化贡献率约为 74.8%。

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来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.