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对固态铝和固态铁界面金属间化合物的生长及金属间化合物对界面结合的影响进行了研究。结果表明,固态铝和固态铁热处理后的界面主要包括Fe2Al5和FeAl3化合物层,金属间化合物恶化了界面结合强度。在拉剪测试中,断裂主要发生在Fe2Al5或FeAl3化合物层,断裂的位置主要取决于化合物层内部的缺陷,包括微裂纹和空洞。热膨胀系数不匹配产生的应力导致内部微裂纹产生,内部孔洞产生的原因是Kirkendall效应。该研究对铝和铁的焊接与连接,尤其是对铝钢复合板的制备,奠定了一定的基础。
The effects of intermetallic compounds on the interfacial bonding between intermetallics and the solid-state interface were studied. The results show that the interface of the solid aluminum and the solid iron after heat treatment mainly includes the Fe2Al5 and FeAl3 compound layers, and the intermetallic compounds deteriorate the interfacial bonding strength. In the tensile shear test, the fracture occurs mainly in the Fe2Al5 or FeAl3 compound layer. The location of the fracture mainly depends on the defects inside the compound layer, including microcracks and voids. The stress caused by the mismatch of thermal expansion leads to internal microcracks, and the internal voids are caused by the Kirkendall effect. The research laid a solid foundation for the welding and joining of aluminum and iron, especially for the preparation of aluminum-steel composite plates.