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
Mechanical Properties and Failure Behavior of 7075Al Matrix Composites Hybrid Reinforced by Carbon Fibers-FeCoCrNiAl High-Entropy Alloy Particles
高昌琦 1马勤 2魏玉鹏 1田江霞 1魏明宇 1王乔博 1孙良玉1
作者信息
- 1. 兰州理工大学材料科学与工程学院,甘肃兰州 730050;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,甘肃兰州 730050
- 2. 兰州理工大学材料科学与工程学院,甘肃兰州 730050;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,甘肃兰州 730050;泉州信息工程学院机械与电气工程学院,福建泉州 362000
- 折叠
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,采用真空热压烧结工艺在580 ℃,30 MPa条件下保温10min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(体积分数由0至40％)呈现先增大后降低的变化,延伸率则逐渐降低.鉴于Ni-Co-P镀层修饰碳纤维与FeCoNiCrAl高熵合金颗粒的混杂强化效应,CF-HEAp/Al复合材料的YS和UTS较HEAp/Al与CF/A1复合材料明显提高,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 behavior of aluminium matrix composites,Ni-Co-P coated carbon fibers reinforced 7075A1 matrix composites(CF/A1),FeCoCrNiAl high-entropy alloy particles reinforced 7075A1 matrix composites(HEAp/Al)and Ni-Co-P coated carbon fibers and FeCoCrNiAl high-entropy alloy particles hybrid reinforced 7075A1 matrix composites(CF-HEAp/Al)were fabricated by vacuum hot pressing sintering under the pressure of 30 MPa at 580 ℃ for 10 min.The microstructure and the fracture morphologies of the composites were observed,and the tensile properties of composites were characterized.Results show that the yield strength(YS)and ultimate tensile strength(UTS)of CF-HEAp/Al composites are firstly increased and subsequently decreased with increasing the CFs content from 0vol％to 40vol％,while the elongation is decreased.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 those of CF/A1 and HEAp/Al composites,and the fracture morphology is characterized by mixed rupture modes of ductile rupture of 7075A1 matrix and fiber pull-out and fracture.
关键词
碳纤维/FeCoCrNiAl高熵合金颗粒/混杂增强效应/力学性能/断裂行为Key words
carbon fibers/FeCoCrNiAl high-entropy alloy particles/hybrid reinforcing effects/mechanical properties/fracture behavior引用本文复制引用
基金项目
国家自然科学基金(52262012)
Innovation Fund Project of Gansu Provincial Department of Education(2021A-030)
出版年
2024
NETL
NSTL
万方数据