Mechanical spectroscopy of aluminium-based materials with self-organised and microstructural types of strain localisation

力学光谱被用来研究自组织（波特万-勒夏特列效应）以及应变局部化的微观结构类型。引起PLC效应的热力耦合微观过程将通过滞弹性和微塑性内摩擦的温度和振幅相关谱进行分析，这也产生了可用作计算机模拟输入的动力学参数。此外，金属基复合材料（MMCs）中的变形不均匀性，包括塑性变形或热处理后的微观结构变化和可能的损伤，将敏感地用阻尼谱和弹性参量表征。通过结合力学光谱学和其他方法来阐明潜在的机制。总之，该项目旨在了解弹性不均匀性，塑性局部化和阻尼过程之间的相互关系，从而有助于多功能优化材料的使用，包括阻尼性能。

Mechanical spectroscopy is used to study self-organised (Portevin-Le Chatelier effect) as well as microstructural types of strain localisation. The thermo-mechanically coupled microscopic processes, causing the PLC effect, are to be analysed by temperature- and amplitude-dependent spectra of anelastic and microplastic internal friction, which also yield kinetic parameters that can be used as an input for computer simulations. In addition, deformation inhomogeneities in metal-matrix composites (MMCs), including microstructural changes and possibly damages after plastic deformation or thermal treatment, will be sensitively caracterised by damping spectra and elastic quantities. The underlying mechanisms are to be clarified by combining mechanical spectroscopy with other methods. In summary, the project is aiming at understanding mutual interrelations between elastic inhomogeneities, plastic localisation and damping processes, thus contributing to a multi-functionally optimised use of materials including damping properties.