Hot cracking in light metal alloys

我的研究计划的首要主题是加工和产品之间的联系，特别强调铸造行业的质量问题。这是加拿大的一个重要行业，尽管已经建立，但在未来几年中，无论是在全球竞争加剧还是在减少能源消耗方面，都面临着严峻的挑战。基于经验的试错设计方法的剩余范围有限。需要基于数学的定量工具，以便制造愿望与设计能力相匹配。 使用基于计算机的数学模型虚拟设计铸造工艺的能力有可能在未来十年内从根本上改变这个行业，从而产生新的和改进的产品和工艺，并降低能耗。本建议书中所描述的项目是关于了解铝合金中的热裂。热裂造成的损失继续给加拿大的铸造行业和熔焊行业带来重大的经济负担。拟议的研究的目标是开发新的实验方法的损伤导致热撕裂的表征，了解在这种损伤的演变中发挥作用的机制，并开发一个基于基础的模型来描述这些合金中的热撕裂，可与热应力过程模型结合使用。

The overarching theme of my research program is the linkage between processing and product, with specific emphasis on quality issues in the casting industry. This is an important industry to Canada and, despite being well established, is one facing critical challenges in the years ahead both in terms of increased global competition and reducing energy consumption. There is limited remaining scope for empirical based trial and error design methodologies. Quantitative, mathematically based, tools are needed so that manufacturing aspirations can be matched with design capability. The ability to virtually design casting processes using computer based mathematical models has the potential to radically transform this industry in the next decade, leading to new and improved products and processes and reduced energy consumption. The project described in this proposal is concerned with understanding hot tearing in aluminum alloys. Losses due to hot-cracking continue to represent a significant economic burden to the casting industry and fusion welding industry in Canada. The goal of the proposed research is to develop novel experimental methodologies for the characterization of damage leading to hot tearing, to understanding the mechanisms at play in the evolution of this damage and to develop a fundamental-based model to describe hot tearing in these alloys that may be used in conjunction with thermal-stress process models.