首页|Ti/Al/Mg/Al/Ti层合板变形行为及断裂形式的原位研究

Ti/Al/Mg/Al/Ti层合板变形行为及断裂形式的原位研究

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为阐明Ti/Al/Mg/Al/Ti层合板的变形行为及断裂形式,对轧制态和退火态的层合板进行原位弯曲和拉伸试验,研究组元板和金属间化合物的裂纹萌生和扩展情况.结果表明:无论Al/Mg界面有无金属间化合物,Al/Mg界面分层都是最先出现的断裂形式,因此Al/Mg界面结合强度决定层合板的力学性能.在退火态层合板中,金属间化合物中多种多样且无规律的裂纹导致Al/Mg界面分层,有助于释放应力.在变形后期,各组元板开始出现颈缩和断裂,依次为Al层、Mg层和Ti层.在轧制态和退火态层合板中,在剪切应力作用下,Mg层裂纹扩展方向与拉伸方向的夹角均为45°左右,裂纹合并最终导致Mg层完全断裂.
In-situ investigation of deformation behavior and fracture forms of Ti/Al/Mg/Al/Ti laminates
In-situ bending and stretching were conducted on hot-rolled and annealed Ti/Al/Mg/Al/Ti laminates, with a focus on crack initiation and propagation of intermetallics and component layers, which helps to clarify their deformation behavior and fracture forms. The results show that delamination is the early fracture form of laminate with or without intermetallics at Al/Mg interface, so Al/Mg interfacial bonding strength determines the mechanical properties of laminate. Various and irregular intermetallics cracks lead to Al/Mg interface delamination in annealed laminate and help to release stress. Necking and fracture of component layers are observed at the late deformation stage, and the sequence is Al, Mg and Ti layers, resulting from their strength. Angle between crack propagation direction and stretching direction of Mg layer both in rolled and annealed laminates is around 45° due to the effect of shear deformation, and crack convergence leads to final complete fracture of Mg layer.

Ti/Al/Mg/Al/Ti laminatein-situ testintermetallicscrack initiationfracture form

聂慧慧、郑留伟、康小平、郝欣为、李线绒、梁伟

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太原理工大学 机械与运载工程学院,太原 030024

太原理工大学 先进镁基材料山西省重点实验室,太原 030024

太原理工大学 分析测试中心,太原 030024

山西能源学院,太原 030006

太原理工大学 材料科学与工程学院,太原 030024

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Ti/Al/Mg/Al/Ti层合板 原位测试 金属间化合物 裂纹萌生 断裂形式

This study was financially supported by Shanxi provincial Youth FundNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScientific and Technological Innovation Programs of Higher Education Institutions in Shanxi,ChinaScientific and Technological Innovation Programs of Higher Education Institutions in Shanxi,China

201801D22110152005362U1810208U17102542019L01492019L0994

2021

10.1016/S1003-6326(21)65605-4

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(6)
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