Phenomenological investigations in light metal casting

迅速演变的能源危机为汽车和航空航天工业开发适当的轻合金成形工艺提供了更大的推动力。镁合金比铝合金轻约33%，比钢轻约75%。这项研究计划建议建立在传统和新型铸造工艺的广泛和开创性的研究经验和知识的基础上，开发在铸造性能、最小缺陷和优异的使用性能方面与铝合金相媲美的镁合金。它旨在加深对铸造缺陷的来源以及各种夹杂物和其他微观结构特征的作用的了解，以期改善熔体清洁度、热流和充填性。此外，通过适当的合金添加组合，可以改善镁合金的高温性能。此外，它还通过测量相关的残余应变和基于实际工艺参数的迭代建模来更好地理解轻合金凝固过程中的热撕裂。预计这能够开发出用于预测热撕裂敏感性的可靠的标准函数。

The rapidly evolving energy crisis provides an increased impetus for developing appropriate shaping processes for light alloys in the automotive and aerospace industries. Magnesium alloys are ~33% lighter than aluminum alloys and ~75% lighter than steel. This research program proposes to build upon extensive and pioneering research experience and knowledge in conventional and novel casting processes to develop magnesium alloys comparable to aluminum alloys in castability, minimal defects and superior in-service properties. It seeks to develop an enhanced understanding of the origin of casting defects and the role of various inclusions and other microstctural features with a view to improving melt cleanliness, heat flow and fillability. Also, it will result in an improvement of the the high temperature properties of magnesium alloys through suitable combination of alloying additions. Further, it seeks a better understanding of hot tearing during solidification of light alloys through measurement of associated residual strains and iterative modelling based on actual process parameters. It is envisaged that this can enable development of reliable criterion functions for predicting hot tear susceptibility.