摘要
采用分步拉伸观测的方法研究了累积叠轧Mg/Al多层复合板材中界面金属间化合物对复合板材断裂过程的影响。结果表明:在单向拉伸过程中,Mg/Al界面处金属间化合物导致了裂纹的萌生和扩展,从而导致Mg/Al界面的分离;在后续拉伸过程中,由于Mg层强度较低,首先产生颈缩失效,致使整个样品提前断裂。
We observed massive cracked intermetallic compounds at the interface of the laminated Mg/Al composite fabricated by accumulative roll bonding and investigated the effect of the compounds on the fracture process of the Mg/Al composite. Scanning electron microscopy observation reveals that these cracked intermetallic compounds dominate the fracture behavior of the accumulative roll bonded Mg/Al composite during uniaxial tensile testing. The results indicate that obvious Mg/Al interface delamination is promoted by the cracked intermetallic compounds, and the cracks propagate into the softer Mg layer and lead to the rupture of Mg layer. These two factors result in the premature failure of the laminated Mg/Al composite.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2016年第9期2242-2245,共4页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(51101043,50801017,51001036)
China Post-doctor Science Foundation(2011M500238)
Fundamental Research Funds for the Central Universities(HIT.NSRIF.201130)
"111" Project(12012)
