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首页> 外文期刊>Metals >Microstructure and Mechanical Properties of Accumulative Roll-Bonded AA1050A/AA5005 Laminated Metal Composites
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Microstructure and Mechanical Properties of Accumulative Roll-Bonded AA1050A/AA5005 Laminated Metal Composites

机译：累积轧制AA1050A / AA5005层压金属复合材料的组织和力学性能

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摘要

Laminated metal composites (LMCs) with alternating layers of commercial pure aluminum AA1050A and aluminum alloy AA5005 were produced by accumulative roll-bonding (ARB). In order to vary the layer thickness and the number of layer interfaces, different numbers of ARB cycles (4, 8, 10, 12, 14 and 16) were performed. The microstructure and mechanical properties were characterized in detail. Up to 8 ARB cycles, the ultrafine-grained (UFG) microstructure of the layers in the LMC evolves almost equally to those in AA1050A and AA5005 mono-material sheets. However, the grain size in the composites tends to have smaller values. Nevertheless, the local mechanical properties of the individual layers in the LMCs are very similar to those of the mono-material sheets, and the macroscopic static mechanical properties of the LMCs can be calculated as the mean value of the mono-material sheets applying a linear rule of mixture. In contrast, for more than 12 ARB cycles, a homogenous microstructure was obtained where the individual layers within the composite cannot be visually separated any longer; thus, the hardness is at one constant and a high level across the whole sheet thickness. This results also in a significant higher strength in tensile testing. It was revealed that, with decreasing layer thickness, the layer interfaces become more and more dominating.
机译：通过累积辊压结合（ARB）来生产具有交替的商业纯铝AA1050A和​​铝合金AA5005层的层压金属复合材料（LMC）。为了改变层厚度和层界面的数量，执行了不同数量的ARB循环（4、8、10、12、14和16）。详细表征了组织和力学性能。多达8个ARB循环，LMC中各层的超细晶粒（UFG）微观结构与AA1050A和​​AA5005单材料薄板的演化几乎相同。然而，复合物中的晶粒尺寸倾向于具有较小的值。然而，LMC中各个层的局部机械性能与单层材料板的局部机械性能非常相似，并且LMC的宏观静态机械性能可以计算为施加线性的单层材料板的平均值混合规则。相反，在超过12个ARB循环后，获得了均匀的微观结构，其中复合材料中的各个层无法再目视分离;因此，在整个片材厚度上，硬度是一个恒定且较高的水平。这也导致拉伸测试中明显更高的强度。结果表明，随着层厚度的减小，层界面越来越占主导地位。

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