Phenomenological investigations in light metal casting

快速发展的能源危机为汽车和航空航天工业中开发适当的轻合金成形工艺提供了更大的动力。镁合金比铝合金轻33%，比钢轻75%。该研究计划旨在建立在传统和新型铸造工艺的广泛和开拓性研究经验和知识的基础上，开发可与铝合金相媲美的镁合金，其可铸造性，最小缺陷和上级使用性能。它旨在提高对铸造缺陷起源的理解，以及各种夹杂物和其他微观结构特征的作用，以改善熔体清洁度，热流和填充性。通过合金化添加剂的适当组合，可以改善镁合金的高温性能。此外，它旨在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，更好地了解轻合金凝固过程中的热裂。据设想，这可以使可靠的标准函数的预测热撕裂敏感性的发展。

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.