Nanoindentation System

该应用是一种普遍适用的纳米压痕系统，用于确定材料或单个微结构部件的局部机械性能，即使在各种环境影响下（例如温度，氢等）。这是一个已经有16年历史的系统的替代品。除了以前的应用领域外，新仪器将越来越多地用于多相和梯度材料以及复合材料的快速“硬度和模量测绘”领域，并且还可在高达800°C的测试温度下进行测量，这是我们以前的系统所不允许的。新仪器还将用于“应变速率跳变试验”和动态力学分析（DMA），并结合高温试验，提供材料变形过程的温度依赖性信息，并通过现场试验使环境影响可见，例如氢对材料行为的影响。除经典金属材料外，还将对金属玻璃、混合泡沫、聚合物材料和复合材料进行测试。此外，将继续使用该系统对诸如“柱”和“微梁”等微米级和纳米级试样进行测试，特别是疲劳测试。采用电流-电压一体化测量方法，研究金属基复合材料的电接触电阻，以便在电气工程中应用。替代采购确保了当前研究项目的可靠延续，并在新的最先进的项目中回答未来的研究问题。该设备将继续在申请人的用户组中运行，并将提供给整个萨尔大学“机械材料测试”服务中心的工作组。

The application is for a universally applicable nanoindentation system for determining the local mechanical properties of materials or individual microstructural components, even under various environmental influences (e.g. temperature, hydrogen, etc.). This is a replacement of a system that is already 16 years old.In addition to the previous areas of application, the new instrument is to be used increasingly in the areas of fast "hardness and modulus mapping" in multiphase and gradient materials as well as in composites, and also for measurement at test temperatures up to 800°C, which our previous system does not allow. The new instrument will also be used for "strain rate jump tests" and dynamic mechanical analysis (DMA) in conjunction with testing at higher temperatures to provide information on the temperature dependence of deformation processes in materials and to make environmental influences visible through in situ tests, such as the influence of hydrogen on material behavior. In addition to classical metallic materials, testing will also be carried out on metallic glasses, on hybrid foams and on polymer materials and composites. In addition, the use of the system for testing, in particular for fatigue, of micrometer- and nanoscale specimens such as "pillars" and "microbeams" will be continued. By means of integrated electrical current-voltage measurement, the electrical contact resistance of metal-matrix composites will be investigated for application in electrical engineering. The replacement procurement ensures the reliable continuation of current research projects and the answering of future research questions in new state-of-the-art projects. The device will continue to be operated in the user group of the applicants and will be available to working groups throughout Saarland University in the "Mechanical Materials Testing" service center.