(南京理工大学 材料科学与工程学院，南京 210094)
摘 要: 采用热轧制备7075Al/MGY/7075Al叠层复合材料，材料的拉伸强度达300 MPa。基于经典叠层板理论计算该材料的首层失效强度，其计算结果与试验结果吻合较好，表明经典叠层板理论可用于预测轧制制备的叠层复合材料首层失效强度。结果表明：随着铝合金厚度的增加，镁基叠层复合材料的拉伸强度、弯曲刚度、压缩强度和弯曲比强度增加，弯曲比刚度和拉伸比强度先增加后降低，且7075Al/MGY/7075Al、7075Al/AZ31/7075Al和3003Al/ MGY/3003Al叠层复合材料的拉伸比刚度增加，但3003Al/ AZ31/3003Al叠层复合材料的拉伸比刚度逐渐减小。
关键字: 轧制复合；镁基叠层复合材料；力学性能
produced by hot rolling
（School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, China）
Abstract:The tensile and bending properties of an 7075Al/MGY/7075Al tri-metallic laminates fabricated by hot rolling were investigated at quasi-static strain rates. The first layer failure strength of the laminates is larger than 300 MPa. Based on the classical laminate theory, the mechanical properties of the laminate were calculated. The prediction results of first layer failure strength agree with the experimental results, indicating that the first layer failure strength of the tri-metallic laminate can be the predicted by the classical laminate theory with the maximum stress criterion. The tensile modulus, bending rigidity, bending strength and specific compressive strength of 7075Al/MGY/7075Al, 7075Al/AZ31/7075Al, 3003Al/MGY/3003Al and 3003Al/AZ31/3003Al laminates increase with the increase of relative thickness of Al alloy layer. The specific bending rigidities of 7075Al/MGY/7075Al, 7075Al/AZ31/7075Al and 3003Al/MGY/3003Al laminates increase with the increase of relative thickness of Al alloy layer while that of 3003Al/ AZ31/3003Al laminate decreases with the increase of relative thickness of Al alloy layer.
Key words: rolling cladding; magnesium-based laminate composite; mechanical properties
