Tailoring Nanostructured, Graded, and Particle-Reinforced Al Laminates by Accumulative Roll Bonding
Tailoring Nanostructured, Graded, and Particle-Reinforced Al Laminates by Accumulative Roll Bonding
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DOI：
10.1002/adma.201100407
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发表时间：
2011-06-17
影响因子：
29.4
通讯作者：
Hoeppel, Heinz Werner
中科院分区：
文献类型：
--
作者：
Goeken, Mathias;Hoeppel, Heinz Werner
累积叠轧焊（ARB）是一种非常有吸引力的工艺，用于加工大型板材以获得超细晶组织和高强度。工业纯铝和许多铝合金从5xxx和沉淀强化6xxx合金系列已被成功地加工成超细晶粒状态和上级延展性已达到某些材料，如工业纯铝。它也已被证明，ARB过程可以成功地用于生产多组分材料与定制的性能，分别通过增强或分级。这允许基于两种或更多种材料/合金来优化特性。例如，为了实现高耐腐蚀性和良好的视觉表面性能，令人感兴趣的是生产两种不同Al合金的复合材料，其中例如5xxx系列的高强度合金用作芯材料，6xxx系列合金用作包覆材料。已经表明，这种复合材料实现了与芯材料大致相同的强度，尽管复合材料的50%由明显更软的包覆合金组成。此外，已经发现，通常出现在5xxx系列合金中并限制作为外壳材料的应用的锯齿状屈服完全消失。此外，ARB工艺允许许多其他有吸引力的方法来设计新的复合材料和梯度材料结构，通过引入颗粒，纤维和片材具有独特的性能。例如，用纳米颗粒强化是一种非常有吸引力的方法，可以改善性能并加速严重塑性变形过程中使用的晶粒细化。添加量仅为0.1体积% Al 2 O3纳米颗粒显著加速了晶粒细化，减少了达到最大强度所需的ARB道次数。本文简要介绍了近年来在多组分超细晶板料制备中应用逆冲成形技术的研究进展。
Accumulative roll bonding (ARB) is a very attractive process for processing large sheets to achieve ultrafine-grained microstructure and high strength. Commercial purity Al and many Al alloys from the 5xxx and the precipitation strengthened 6xxx alloy series have been successfully processed by the ARB process into an ultrafine-grained state and superior ductility have been achieved for some materials like technical purity Al. It has also been shown that the ARB process can be successfully used to produce multi-component materials with tailored properties by reinforcement or grading, respectively. This allows optimizing the properties based on two or more materials/alloys. For example, to achieve high corrosion resistance and good visual surface properties it is interesting to produce a composite of two different Al alloys, where for example a high strength alloy of the 5xxx series is used as the core material and a 6xxx series alloy as the clad material. It has been shown that such a composite achieves more or less the same strength as the core material although 50% of the composite consists of the significant softer clad alloy. Furthermore, it has been found, that the serrated yielding which typically appears in 5xxx series alloys and limits applications as outer skin materials completely disappears. Moreover, the ARB process allows many other attractive ways to design new composites and graded material structures with unique properties by the introduction of particles, fibres and sheets. Strengthening with nanoparticles for example is a very attractive way to improve the properties and accelerate the grain refining used in the severe plastic deformation process. With an addition of only 0.1 vol.-% Al2O3 nanoparticles a significantly accelerated grain refinement has been found which reduces the number of ARB passes necessary to achieve the maximum in strength. The paper provides a short review on recent developments in the field of ARB processing for producing multicomponent ultrafine-grained sheet materials with tailored properties.