Materials World Network: Developing a New Mg Alloy with Optimized Texture for Enhanced Formability

镁合金板材是在世界范围内的工业利益的焦点，对增强轻量化应用的观点。然而，需要提高合金的轧制性和板材成形性。该项目的目标是在更好地了解晶体织构和合金元素对成形性影响的基础上开发新的镁合金。虽然典型的镁合金表现出强烈的基本织构，它们之间只有轻微的变化，但最近有报道称，含有稀土元素和/或钇的合金可以发展出更随机的织构。这种织构可以提高成形性，降低力学性能的各向异性。织构的改变与再结晶机制的改变有关，但为了制定有效的合金设计策略，需要在合金添加量和机制变化之间建立更具体的联系。本项目将有很强的实验重点，并在合作项目中进行织构对成形性影响的晶体塑性建模和相稳定性的热力学建模。这种合金开发的综合实验/建模方法将产生具有设计性能的镁片合金。

Magnesium sheet alloys are in a worldwide spotlight of industrial interest with a view towards enhanced lightweight applications. However, there is a need for alloys with improved roll-ability and sheet formability. The objective of this project is to develop new magnesium alloys based on a better understanding of the influence of crystallographic texture and alloying elements on formability. While typical magnesium wrought alloys exhibit strong basal textures with only slight variations between them, it has recently been reported that alloys containing rare earth elements and/or yttrium can develop a more random type texture. Such a texture could improve formability as well as reduce the anisotropy of mechanical properties. The texture modification has been associated with changes in the recrystallization mechanisms, but a more specific connection between alloying additions and mechanistic changes is required to develop an effective alloy design strategy. There will be a strong experimental focus in this project accompanied by crystal plasticity modelling of the influence of texture on the formability and thermodynamic modelling of phase stability in the partner project. This integrated experimental/modelling approach to alloy development will yield magnesium sheet alloys with designed properties.