Effects of Reinforcement Content and Homogenization Treatment on the Microstructure and Mechanical Properties of in-situ TiB2/2219Al Composites

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外文摘要：Obtaining an appropriate grain size is crucial for Al alloys or Al matrix composites prior to processing,as it significantly influences the mechanical properties of components and workability during the manufacturing process.TiB2 particles are exceptional grain refiners in Al and serve as excellent reinforcement particles for particulate-reinforced aluminum matrix composites.However,the optimal particle content for achieving excellent refinement and strengthening effects depends on the matrix composition and requires further investigation.Additionally,homogenization is essential for mitigating the ele-ment segregation in the ingot.Although it is anticipated that adding suitable particles can effectively inhibit undesired grain growth during homogenization,comprehensive investigations on this aspect are currently lacking.Therefore,TiB2/2219Al matrix composites with varying reinforcement contents(0,1,3,5 wt％ )were fabricated through traditional casting followed by homogenization treatment to address these research gaps.The effects of reinforcement content and homogenization treatment on the microstructure and mechanical properties of in-situ TiB2/2219A1 composites were investigated.The results demonstrate a gradual strengthening of the refining effect with increasing particle concentration.Moreover,composites containing 3 wt％ TiB2 particles exhibit superior comprehensive mechanical properties in both as-cast and homogenized state.Additionally,potential orientation relationships are observed and calculated between undissolved Al2Cu eutectic phase and submicron or nanometer-sized TiB2 particles,resulting in a mixture structure with enhanced bonding strength.This mixture structure is continuously distributed along grain boundaries during solidification,forming a three-dimensional cellular network that acts as primary retarding forces for grain growth during homogenization.Furthermore,the established homogenization kinetic equations were further utilized to analyze the correlation between homogenization time and grain size,as well as the influence of homogenization temperature.

外文关键词：

TiB2/2219Al matrix compositeReinforcement contentHomogenization treatmentHomogenization kineticCellular structureMechanical property

作者：

Linwei Li、Donghu Zhou、Kai Zhao、Lifeng Jiang、Huijun Kang、Enyu Guo、Feng Mao、Zongning Chen、Tongmin Wang

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作者单位：

Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China

Ningbo Institute of Dalian University of Technology,Ningbo 315000,China

National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials,Henan University of Science and Technology,Luoyang 471003,China

Longmen Laboratory,Luoyang 471000,China

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基金：

National Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScience and Technology Plan Project of Liaoning ProvinceScience and Technology Plan Project of Liaoning ProvinceInnovation Foundation of Science and Technology of DalianInnovation Foundation of Science and Technology of DalianMajor Science and Technology Projects of Longmen LaboratoryFundamental Research Funds for the Central Universities

项目编号：

2022YFB34001425217435652022017519278015197105151901034U22A201742022010005-JH6/10012022JH2/10132020JJ25CY0022020J12GX037231100220400

出版年：

2024

DOI：

10.1007/s40195-024-01695-z

金属学报(英文版)

中国金属学会

金属学报(英文版)

CSTPCD

影响因子：0.77

ISSN：1006-7191

年,卷(期)：2024.37(8)