首页|Ti3AlC2增强Al6061复合材料的显微组织、界面反应及力学性能

Ti3AlC2增强Al6061复合材料的显微组织、界面反应及力学性能

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研究Al和Ti3AlC2在不同浇铸温度下的界面反应及其对复合材料显微组织和力学性能的影响.结果表明,与Al6061基体相比,添加3.0％(质量分数)Ti3AlC2可使复合材料中α(Al)的平均晶粒细化50.1％.形貌分析表明,当浇注温度为720 ℃时,在Ti3AlC2边缘生成厚度约为180 nm的原位Al3Ti过渡层,形成结合良好的Al-Al3Ti界面.在此温度下,Al6061-3.0％Ti3AlC2(质量分数)复合材料的极限抗拉强度为199.2 MPa,比Al6061基体提高41.5％.机理分析进一步阐明,浇注温度为720 ℃有利于在Ti3AlC2边缘生成纳米级过渡层.此状态下,热错配强化起主导作用,其强化贡献率约为74.8％.
Micro structure,interfacial reaction behavior,and mechanical properties of Ti3AlC2reinforced A16061 composites
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 Al3Titransition layer of～180 nm in thickness is generated around the edge of Ti3AlC2 at 720 ℃,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 ℃ is favourable for forming the nano-sized transition layer at the Ti3AlC2edges.And,the thermal mismatch strengthening plays a dominant role in this state,with a strengthening contribution of about 74.8％.

Al6061 compositesTi3AlC2microstructureinterfacial reactiontensile mechanical properties

刘智彬、鲍家宝、胡文杰、闫洪

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南昌大学先进制造学院,南昌 330031

江西交通职业技术学院,南昌 330013

Al6061复合材料 Ti3AlC2 显微组织 界面反应 拉伸力学性能

National Natural Science Foundation of ChinaScience and Technology Project of Jiangxi Provincial Department of Transportation,China

519650402022H0048

2024

10.1016/S1003-6326(24)66574-X

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCD
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2024.34(9)
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