The role of interface region on texture development in clad aluminum sheet products

在过去的100年里，铝工业已经开发出了各种高度工程化的单片合金，这些合金具有均匀的通过厚度特性，以及均匀的纹理和微观结构。在某些情况下，合金表面可以为特殊应用量身定制，例如通过阳极氧化或包层进行防腐。传统的覆层工艺包括将覆层合金板焊接到芯合金板上，然后进行进一步的轧制加工。结果是一个有限完整性的机械键，通常具有含有原表面氧化物的波浪形界面。诺贝丽斯公司（Novelis Inc.）开发了一种名为Fusion的新型熔覆技术，可以同时将不同的铝合金层铸造成一个滚动铸锭。在熔合过程中，在芯和包层合金之间形成的界面是冶金的，即它是平坦的，完全连续的，没有孔隙或外来的氧化相。为了充分利用芯层和包层组合的优势，需要了解针对单片合金优化的轧制工艺如何改变这种类复合材料的织构和微观结构的演变。女王大学的研究人员将与诺贝丽斯全球技术中心合作，开发基于扫描电子显微镜的微织构和微聚焦x射线衍射技术，以有效地量化汽车应用的熔融合金的厚度织构、微观结构和残余应变发展。Fusion产品有可能为汽车行业的结构铝合金创造一个新的市场，并提高诺贝丽斯安大略省金士顿工厂的产量。这项研究工作将为一名硕士候选人和两名工程学士候选人提供变形纹理理论的教学，并提供最先进设备和技术的实践经验，这可能会为科学文献做出新的贡献。

Over the last 100 years the aluminum industry has developed a variety of highly engineered monolithic sheet alloys with uniform through-thickness properties associated with a uniform texture and microstructure. In some cases the alloy surfaces can be tailored for special applications such as corrosion protection by anodizing, or cladding. The cladding process has traditionally consisted of welding a clad alloy sheet onto a core alloy sheet, followed by further roll processing. The result is a mechanical bond of limited integrity which often has a wavy interface containing former surface oxides. Novelis Inc. has developed a new cladding technology called Fusion, which simultaneously casts different aluminum alloy layers into a single rolling ingot. The interface formed between the core and cladding alloy in Fusion is metallurgical, that is it is flat, fully continuous, with no porosity or extraneous oxide phases. To fully exploit the benefits of both the core and clad combinations requires an understanding of how the roll processing optimized for the monolithic alloys alters the evolution of the texture and microstructure in this composite-like material, if at all. Working with Novelis Global Technology Centre, Queen's University researchers will develop complimentary scanning electron microscopy-based micro-texture and micro-focused x-ray diffraction techniques to efficiently quantify the through-thickness texture, microstructure and residual strain development in Fusion alloys targeted for automotive applications. The Fusion product can potentially create a new market for structural aluminum alloys in the automotive sector, and enhance production in the Novelis Kingston, Ontario plant. The research work to be carried out will enable teaching of one M.Sc. candidate and two B.Sc. engineering candidates on deformation texture theory and hands-on experience with state-of-the-art equipment and techniques, which will likely result in new contributions to the scientific literature.