(南京理工大學 材料科學與工程學院，南京 210094)
摘 要: 采用熱軋制備7075Al/MGY/7075Al疊層復合材料，材料的拉伸強度達300 MPa。基于經典疊層板理論計算該材料的首層失效強度，其計算結果與試驗結果吻合較好，表明經典疊層板理論可用于預測軋制制備的疊層復合材料首層失效強度。結果表明：隨著鋁合金厚度的增加，鎂基疊層復合材料的拉伸強度、彎曲剛度、壓縮強度和彎曲比強度增加，彎曲比剛度和拉伸比強度先增加后降低，且7075Al/MGY/7075Al、7075Al/AZ31/7075Al和3003Al/ MGY/3003Al疊層復合材料的拉伸比剛度增加，但3003Al/ AZ31/3003Al疊層復合材料的拉伸比剛度逐漸減小。
關鍵字: 軋制復合；鎂基疊層復合材料；力學性能
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
