时效处理对55 vol％SiCp/6061Al复合材料力学性能的影响
Effect of aging on mechanical properties of 55 vol％SiCp/6061Al composite
曹雷刚 1朱明雨 1杨越 1刘园 1崔岩1
作者信息
- 1. 北方工业大学机械与材料工程学院,北京 100144
- 折叠
摘要
采用热等静压法制备55vol％SiCp/6061Al复合材料,研究了 170、180和190℃条件下时效处理对复合材料力学性能的影响规律.结果表明,制备态55vol％SiCp/6061Al复合材料的硬度和弯曲强度分别为182.4 HBW和440 MPa.复合材料表现出典型的双峰时效现象和动力学加速行为,当时效温度由170℃升高至190℃时,峰时效硬度对应时间由2.5 h缩短至0.3 h.时效处理可以显著提升复合材料的力学性能.最优时效温度为180℃,其第一个峰时效态(1 h)复合材料硬度最大,为236.3 HBW,增幅29.6％;第二个峰时效态(4.5 h)复合材料弯曲强度最大,为612 MPa,增幅39.1％.
Abstract
55vol％SiCp/6061 Al composite was prepared by using hot isostatic pressing method.The effect of aging treatment at 170,180,and 190℃on the mechanical properties of the composite was investigated.The results show that the hardness and bending strength of the as-prepared composite are 182.4 HBW and 440 MPa,respectively.The composite exhibits typical double-peak aging behavior and dynamic acceleration phenomenon.As the aging temperature increases from 170 ℃ to 190 ℃,the time corresponding to the first peak aging decreases from 2.5 h to 0.3 h.The aging treatment can significantly improve the mechanical properties of the composite and the optimal aging temperature is 180 ℃.Correspondingly,the hardness of the composite aged for 1 h is the highest,which is 236.3 HBW,with an increment of 29.6％,while the bending strength of the composite aged for 4.5 h is the highest,which is 612 MPa,with an increment of 39.1％.
关键词
SiCp/6061Al复合材料/热等静压法/时效处理/硬度/弯曲强度Key words
SiCp/Al composite/hot isostatic pressing/aging/hardness/bending strength引用本文复制引用
出版年
2024
NETL
NSTL
万方数据