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碳纤维-FeCoCrNiAl高熵合金颗粒混杂增强7075铝基复合材料的力学性能及断裂行为
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兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室

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国家自然科学基金项目(地区基金);甘肃省教育厅创新基金


Mechanical properties and failure behavior of 7075Al matrix composites Hybrid Reinforced by Carbon fibers and FeCoCrNiAl High-Entropy Alloy Particles
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Lanzhou University of Technology

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National Natural Science Foundation of China (Grant No.52262012);Innovation Fund Project of Gansu Provincial Department of Education (Grant No. 2021A-030)

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    摘要:

    为探究双相增强体对铝基复合材料拉伸性能和断裂行为的影响,本文采用真空热压烧结工艺在580℃,30MPa条件下保温10分钟成功制备了FeCoCrNiAl高熵合金颗粒增强7075铝基复合材料(HEAp/Al),Ni-Co-P镀层修饰碳纤维增强7075铝基复合材料(CF/Al)和FeCoCrNiAl高熵合金颗粒及Ni-Co-P镀层修饰碳纤维混杂增强铝基复合材料(CF-HEAp/Al)。并对不同复合材料微观结构及拉伸性能进行分析表征及比较。结果表明:CF-HEAp/Al复合材料的屈服强度(YS)与极限拉伸强度(UTS)随纤维含量的升高呈现先增大后降低的变化,延伸率则逐渐降低。与HEAp/Al和CF/Al复合材料相比,CF-HEAp/Al复合材料的YS和UTS提升幅度明显,且其断口表现出基体韧性断裂及纤维拔出与断裂的多种失效特征。

    Abstract:

    To investigate the effects of double -scaled reinforcements on the tensile properties and failure behaviors of aluminium matrix composites, Ni-Co-P coated carbon fibers reinforced 7075Al matrix composites (CF/Al), FeCoCrNiAl High-Entropy alloy particles reinforced 7075Al matrix composites (HEAp/Al) and Ni-Co-P coated carbon fibers and FeCoCrNiAl High-Entropy alloy particles hybrid reinforced 7075Al matrix composites (CF-HEAp/Al) are fabricated by vacuum hot pressing sintering with pressure of 30MPa at 580°C for 10minutes. The microstructure and the fracture morphologies of the composites were observed, and the tensile properties of composites were characterized. The yield strength (YS) and ultimate tensile strength (UTS) of CF-HEAp/Al composites are firstly increased and subsequently decreased with increasing the CFs volume fraction from 0vol% to 40vol%, while the elongation decreases. Owing to the hybrid reinforcing effects of Ni-Co-P coated carbon fibers and FeCoCrNiAl High-Entropy alloy particles, the YS and UTS of CF-HEAp/Al composites have larger improvement compared with CF/Al and HEAp/Al composites, and its fracture morphology is characterized by mixed rupture modes of ductile rupture of 7075Al matrix and fiber pull-out and fracture.

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高昌琦,马勤,魏玉鹏,田江霞,魏明宇,王乔博,孙良玉.碳纤维-FeCoCrNiAl高熵合金颗粒混杂增强7075铝基复合材料的力学性能及断裂行为[J].稀有金属材料与工程,,().[Gao Changqi, Ma Qin, Wei Yupeng, Tian Jiangxia, Wei Mingyu, Wang Qiaobo, Sun liangyu. Mechanical properties and failure behavior of 7075Al matrix composites Hybrid Reinforced by Carbon fibers and FeCoCrNiAl High-Entropy Alloy Particles[J]. Rare Metal Materials and Engineering,,():].

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  • 收稿日期:2023-05-10
  • 最后修改日期:2023-08-15
  • 录用日期:2023-08-24
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