Thermomechanical treatment of a twin-roll cast, LPSO-containing WZ73 magnesium alloy for tailor-made structure and property adjustment

在文献中，研究和表征了镁合金Mg97Zn1Y2(at.%)的力学性能、成形性和织构发展。该合金中存在的金属间化合物LPSO相改善了性能。进一步的研究表明，制备工艺影响相的形态和相关的析出动力学。资源节约型双辊铸轧工艺一直是国内外研究的热点。在使用新材料技术和相关的工艺管理方面有研究工作，但含稀土的镁合金到目前为止还没有得到多少关注。因此，关于双辊铸造含LPSO的镁合金的未决问题可以被公式化。为了更好地理解和区别于以前的结果和研究工作，下面总结如下：-研究了含镁合金Mg97Zn1Y2(at.-%)在铸造和变形状态下的成形性和织构发展的行为，但到目前为止还没有在双辊铸造状态下。-基于双辊铸轧条件，关于析出动力学和相关的形态，尚不清楚LPSO相如何通过热处理步骤在该合金系统中发展。-此外，根据双辊铸造和热处理的初始条件，重要的是要研究在成形过程中哪些机制可以被激活，以及哪些织构的发展与之相关。所获得的结果可以用来控制双辊铸造镁合金中LPSO相的动力学，从而得到适合于应用的形变热处理。随之而来的是对沉淀和转变机制以及由此产生的纹理的评估。

In the literature, the Mg alloy Mg97Zn1Y2 (at .-%) has been investigated and characterized with regard to the achievable mechanical properties, formability and texture development. The intermetallic LPSO phases occurring in this alloy result in an improved property profile. Further studies show that the manufacturing process influences the morphology and the associated precipitation kinetics of the phases. The resource-efficient process of twin-roll casting is the focus of research work at national and international level. There isresearch work on the use of new material technologies and the associated process management, but Mg alloys with rare earths have so far received little attention. Open questions about twin-roll cast LPSO-containing Mg alloys can thus be formulated. These are summarized below for a better understanding and to distinguish from previous results and research work: - The behavior of the LPSOcontaining Mg alloy Mg97Zn1Y2 (at .-%) was investigated for the cast and deformed state with regard to formability and texturedevelopment, but so far not in the twin-roll cast state. - Based on the twin-roll cast condition, it is unclear how the LPSO phases develop in this alloy system through heat treatment steps with regard to the precipitation kinetics and the associated morphology. - In addition, depending on the twin-roll cast and heat-treated initial condition, it isimportant to investigate which mechanisms can be activated during forming and which texture development is associated with it. The results obtained should make it possible to control the kinetics of LPSO phases in a twin roll cast Mg alloy Mg97Zn1Y2 (at .-%) in such a way that a thermomechanical treatment suitable for the application can be derived. This is accompanied by an assessment of the precipitation and transformation mechanisms and the resulting texture.