0.25Cu0.75FeNiCo高熵合金顆粒作為增強相來增強鋁合金,研究高熵合金含量變化對復合材料顯微組織和力學性能的影響。結果表明：高熵合金增強相在基體中分布均勻,隨著高熵合金體積分數(shù)的增大,局部會出現(xiàn)少量顆粒團聚現(xiàn)象。復合材料的彈性模量和硬度隨著高熵合金含量的增加而增大,但復合材料的抗拉強度和延伸率呈現(xiàn)出先增大后降低的趨勢。當高熵合金的體積分數(shù)為5%時,復合材料的極限抗拉強度和伸長率達到最大值(σb：437.6 MPa,ε：11.42%),比鋁合金基體分別提高了20.54%和36.6%。TEM分析表明,高熵合金顆粒和鋁合金良好的界面結合狀態(tài)使得復合材料具有較高的綜合力學性能。"/>

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Al0.25Cu0.75FeNiCo顆粒增強鋁合金的組織與性能
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華南理工大學廣東省金屬新材料制備與成形重點實驗室,華南理工大學廣東省金屬新材料制備與成形重點實驗室,華南理工大學廣東省金屬新材料制備與成形重點實驗室,華南理工大學廣東省金屬新材料制備與成形重點實驗室

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廣東省科技計劃項目；廣東省自然科學基金資助項目


Microstructure and mechanical properties of Al0.25Cu0.75FeNiCo HEAs particulates reinforced aluminum alloy
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Guangdong Key Laboratory for Advanced Metallic Mateirals Processing,South China University of Technology,Guangdong Key Laboratory for Advanced Metallic Mateirals Processing,South China University of Technology,Guangdong Key Laboratory for Advanced Metallic Mateirals Processing,South China University of Technology,Guangdong Key Laboratory for Advanced Metallic Mateirals Processing,South China University of Technology

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Guangdong Science and Technology Plan, Natural Science Foundation of Guangdong Province

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    摘要:

    高熵合金是一種新型的結構與功能材料,源于金屬-金屬間天然的界面結合特性,高熵合金與鋁合金基體間的界面潤濕性極好。本文采用Al0.25Cu0.75FeNiCo高熵合金顆粒作為增強相來增強鋁合金,研究高熵合金含量變化對復合材料顯微組織和力學性能的影響。結果表明：高熵合金增強相在基體中分布均勻,隨著高熵合金體積分數(shù)的增大,局部會出現(xiàn)少量顆粒團聚現(xiàn)象。復合材料的彈性模量和硬度隨著高熵合金含量的增加而增大,但復合材料的抗拉強度和延伸率呈現(xiàn)出先增大后降低的趨勢。當高熵合金的體積分數(shù)為5%時,復合材料的極限抗拉強度和伸長率達到最大值(σb：437.6 MPa,ε：11.42%),比鋁合金基體分別提高了20.54%和36.6%。TEM分析表明,高熵合金顆粒和鋁合金良好的界面結合狀態(tài)使得復合材料具有較高的綜合力學性能。

    Abstract:

    High entropy alloy is a novelty structural and functional materials. For the excellent interfacial wettability between HEAs and Al alloy, the interfaces of HEAs-Al is well-bonded. In this paper, the Al0.25Cu0.75FeNiCo particles were used as the reinforcement to improve the strength and ductility of aluminum alloy. The effects of HEAs content on microstructure and mechanical properties of the composites were investigated. Microstructure observation showed that the HEAs particles were distributed uniformly in the composites. With the reinforcement content increasing, particles clustering were found in local region. Results showed that the modulus and hardness of the composites increase with increasing of reinforcement content. While the tensile strength and elongation of the composites increase firstly then drop with increasing of reinforcement content. At a reinforcement content of 5%, the maximum tensile strength and elongation of the composites is 437.6 MPa and 11.42%, which were 20.54% and 36.6% higher than those of the aluminum alloy matrix. The excellent comprehensive mechanical properties is due to the well-bonded interfaces of HEAs-Al.

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朱德智,丁霞,戚龍飛,陳奇. Al0.25Cu0.75FeNiCo顆粒增強鋁合金的組織與性能[J].稀有金屬材料與工程,2017,46(11):3400~3404.[Zhu Dezhi, Ding Xia, Qi Longfei, Chen Qi. Microstructure and mechanical properties of Al0.25Cu0.75FeNiCo HEAs particulates reinforced aluminum alloy[J]. Rare Metal Materials and Engineering,2017,46(11):3400~3404.]
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  • 收稿日期:2016-08-24
  • 最后修改日期:2016-12-19
  • 錄用日期:2017-01-06
  • 在線發(fā)布日期: 2017-12-13
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