2Cu以及硅相得到了細化。同時，添加了HEA顆粒的合金抗拉伸強度和顯微硬度得到了顯著提高。與基體相比，含12%（質量分數(shù)）HEA 復合材料的屈服強度和極限拉伸強度分別提高了16.9%和21.9%。在 20 N載荷下，復合材料的磨損率也因顯微硬度的提高而降低，這主要歸因于載荷傳遞強化、位錯增殖和顯微結構優(yōu)化。"/>

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高熵合金AlCoCrFeNi對 Al-Si-Cu 合金微觀結構和力學性能的影響
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作者單位:

1.南昌航空大學 航空制造工程學院，江西 南昌 330036;2.江西五十鈴汽車有限公司 技術研發(fā)部，江西 南昌 330010;3.嘉善鑫海精密鑄造有限公司，浙江 嘉興 314101

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基金項目:

江西省教育廳科學技術研究項目(GJJ190531)


Effect of AlCoCrFeNi High-Entropy Alloy on Microstructure and Mechanical Properties of Al-Si-Cu Alloy
Author:
Affiliation:

1.School of Aeronautic Manufacturing Engineering, Nanchang Hangkong University, Nanchang330036, China;2.Technology R&D Department, Jiangxi Isuzu Motors Co., Ltd, Nanchang330010, China;3.Jiashan Xinhai Precision Casting Co., Ltd, Jiaxing314101, China

Fund Project:

Science and Technology Research Program of Jiangxi Provincial Department of Education (GJJ190531)

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    摘要:

    高熵合金（HEA）AlCoCrFeNi作為一類新型合金材料，具有高穩(wěn)定性、優(yōu)異的比強度和耐腐蝕性等特點，在鋁基復合材料（AMC）領域備受關注。為了研究AlCoCrFeNi HEA顆粒對鋁合金微觀結構和力學性能的影響，采用高能超聲鑄造工藝制備了AlCoCrFeNi HEA顆粒增強ADC12復合材料。隨后，研究了添加HEA對ADC12合金微觀結構和力學性能的影響。結果表明，添加的HEA顆粒與鋁基體緊密結合?；w中的Al2Cu以及硅相得到了細化。同時，添加了HEA顆粒的合金抗拉伸強度和顯微硬度得到了顯著提高。與基體相比，含12%（質量分數(shù)）HEA 復合材料的屈服強度和極限拉伸強度分別提高了16.9%和21.9%。在 20 N載荷下，復合材料的磨損率也因顯微硬度的提高而降低，這主要歸因于載荷傳遞強化、位錯增殖和顯微結構優(yōu)化。

    Abstract:

    High-entropy alloy (HEA), as a class of new alloy materials characterized by high stability, excellent specific strength and corrosion resistance, has attracted much attention in the field of aluminum matrix composites (AMCs). To study the effect on microstructure and mechanical properties of aluminum alloys, AlCoCrFeNi HEA particles reinforced ADC12 composites were fabricated by high energy ultrasonic casting process. Subsequently, the effect of HEAs addition on the microstructure and mechanical properties of ADC12 alloys was investigated. Results show that the added HEA particles are tightly bonded to the aluminum matrix. The Al2Cu phase in the matrix is refined. Meanwhile, the tensile strength and microhardness of the alloys with the addition of HEA particles are significantly improved. The yield strength and ultimate tensile strength of as-prepared composites with 12wt% HEAs are increased by 16.9% and 21.9% compared with those of the matrix, respectively. The wear rate of the composites is also decreased due to the enhancement of microhardness under applied load of 20 N. It is mainly attributed to the load transfer strengthening, dislocation proliferation and the optimization of the microstructure.

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吳慶捷,郭正華,黃勤,凌李石保.高熵合金AlCoCrFeNi對 Al-Si-Cu 合金微觀結構和力學性能的影響[J].稀有金屬材料與工程,2024,53(11):3017~3025.[Wu Qingjie, Guo Zhenghua, Huang Qin, Lingli Shibao. Effect of AlCoCrFeNi High-Entropy Alloy on Microstructure and Mechanical Properties of Al-Si-Cu Alloy[J]. Rare Metal Materials and Engineering,2024,53(11):3017~3025.]
DOI：10.12442/j. issn.1002-185X.20240073

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  • 收稿日期:2024-02-06
  • 最后修改日期:2024-09-16
  • 錄用日期:2024-06-19
  • 在線發(fā)布日期: 2024-11-18
  • 出版日期: 2024-11-08