振动频率对消失模铸造Al/Mg复合材料界面组织和力学性能的影响  

Effects of Vibration Frequency on Interfacial Microstructure and Mechanical Properties of Al/Mg Composites by Lost Foam Casting

作　　者：王俊龙 蒋文明[1] 管峰 李广宇[1] 张政[1] 樊自田[1] Wang Junlong;Jiang Wenming;Guan Feng;Li Guangyu;Zhang Zheng;Fan Zitian(State Key Laboratory of Material Processing and Die&Mould Technology,Huazhong University of Science and Technology)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,武汉430074

出　　处：《特种铸造及有色合金》2022年第6期672-677,共6页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(52075198);国家重点研发计划资助项目(2020YFB2008304);国家磁约束核聚变能发展研究专项基金资助项目(2018YFE0313300);新金属材料国家重点实验室开放课题重点基金资助项目(2021-ZD07)

摘　　要：采用机械振动强化Al/Mg双金属复合材料的结合界面,研究了振动频率对消失模固-液复合铸造Al/Mg双金属复合材料的界面组织和力学性能的影响。结果表明,振动频率对Al/Mg双金属复合材料的界面组织和力学性能有显著影响。随着振动频率增加,Al/Mg双金属复合材料界面金属间化合物(IMCs)层厚度减小,导致Al_(3)Mg_(2)和Al_(12)Mg_(17)脆性相减少,并且界面Mg_(2)Si相细化,分布由团聚变为分散。当振动频率为50 Hz时,Al/Mg双金属结合界面的平均剪切性能最大,达到46.83 MPa,相比未振动的Al/Mg双金属复合材料性能提升47.13%。Mechanical vibration was utilized to strengthen bonding interface of the Al/Mg bimetallic composites. The effects of vibration frequency on the interfacial microstructure and mechanical properties of Al/Mg bimetallic composites by LFC solid-liquid composite casting were investigated. The results indicate that the vibration frequency has a significant effect on the interfacial microstructure and mechanical properties of Al/Mg bimetallic composites. With the increase of vibration frequency, the thickness of the intermetallic compound(IMCs) layer is decreased, resulting in the decrease of brittle phase of Al_(3)Mg_(2) and Al_(12)Mg_(17), and the Mg_(2)Si phase at the interface is refined with a distribution change from agglomeration to dispersion. When the vibration frequency is 50 Hz, the shear strength of Al/Mg bimetallic composites reaches the maximum of 46.83 MPa, which is 47.13% higher than that of the Al/Mg bimetallic composites without vibration.

关 键 词：振动频率 Al/Mg双金属复合材料 界面组织 力学性能 

分 类 号：TG249.6[金属学及工艺—铸造] TB331[一般工业技术—材料科学与工程]