Analytical scanning electron microscope with a micro-mechanical testing device

开姆尼茨工业大学材料科学与工程研究所的研究重点是微观结构参数与由此产生的宏观性能之间的复杂相互关系。本提案要求为一种新的扫描电子显微镜提供资金，该显微镜带有用于微机械测试的原位工具。在材料科学主席的职位上，这对于研究由严重塑性变形产生的高强度、超细晶粒金属材料的力学行为、结构材料（如钢）和功能材料（如形状记忆合金）中的马氏体相变、高速切削或电磁脉冲焊接过程中绝热剪切带形成等动态过程或超塑性行为尤其相关。扫描电子显微镜领域的不同方法也极大地促进了材料和表面技术、复合材料和材料化合物、电子显微镜和微观结构分析等学科在微观和纳米尺度上的成功研究。最近在分析扫描电子显微镜领域取得的重要进展为研究基础材料科学主题提供了新的工具（例如，用于表征纳米级相和微观结构特征的菊池衍射和低kv - edxs）。这些工具目前还不能在研究所使用，但它们对于未来的研究项目是非常必要的。在WDXS对痕量元素的高分辨率化学定量方面，本提案应用的扫描电子显微镜将大大扩展整个开姆尼茨工业大学可用的方法。此外，它将特别支持微观结构特征与微观力学性能的原位相关性，因为原位纳米压痕工具将在开姆尼茨工业大学首次允许局部微观力学测试与变形、转变或损伤过程的表征相结合。

Research at the Institute of Materials Science and Engineering at TU Chemnitz is strongly focused on the complex interrelations between microstructural parameters and the resulting macroscopic properties. This proposal requests funding for a new scanning electron microscope with an in-situ tool for micromechanical testing. At the Chair of Materials Science, this is particularly relevant for investigations on the mechanical behavior of high-strength, ultra-fine grained metallic materials produced by severe plastic deformation, martensitic phase transformations in structural materials (like steels) and functional materials (such as shape memory alloys), dynamic processes like adiabatic shear band formation during high speed cutting or electro-magnetic pulse welding, or superplastic behavior. Different methods in the field of scanning electron microscopy also considerably contribute to successful research on the micro- and nanoscales at the Chairs of Materials and Surface Technology, Composite Materials and Material Compounds, and Electron Microscopy and Microstructure Analysis. Important improvements made recently in the field of analytical scanning electron microscopy provide new tools (for instance, Transmission Kikuchi Diffraction and low-kV-EDXS for the characterization of nano-scale phases and microstructural features) for the investigation of fundamental materials science topics. These tools are currently not available at the institute, but they are strongly needed for future research projects. The scanning electron microscope applied for with this proposal will considerably extend the methods available at the entire TU Chemnitz in terms of high-resolution chemical quantification of trace elements by WDXS. Moreover, it will particularly support the in-situ correlation of microstructural features with micro-mechanical properties, as the in-situ nanoindentation tool will, for the first time at TU Chemnitz, allow for local micro-mechanical testing in combination with a characterization of deformation, transformation or damage processes.