Analytical scanning electron microscope with a micro-mechanical testing device

德克萨斯大学开姆尼茨大学材料科学与工程研究所的研究主要集中在微观结构参数和由此产生的宏观性能之间的复杂相互关系上。这项提议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。作为材料科学主席，这对于研究由严重塑性变形产生的高强度、超细晶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、高速切割或电磁脉冲焊接过程中形成绝热剪切带的动态过程，或超塑性行为的研究尤其相关。扫描电子显微镜领域的不同方法也为材料与表面技术、复合材料和材料化合物以及电子显微镜和微结构分析教席在微米和纳米尺度上的成功研究做出了很大贡献。最近在分析扫描电子显微镜领域取得的重大进展为基础材料科学课题的研究提供了新的工具(例如，用于表征纳米级相和微结构特征的Kikuchi衍射和低千伏能谱)。该研究所目前没有这些工具，但未来的研究项目强烈需要这些工具。根据这一建议申请的扫描电子显微镜将极大地扩展整个TU Chemnitz在WDXS高分辨率化学定量痕量元素方面的现有方法。此外，它将特别支持微结构特征与微机械性能的现场关联，因为在TU Chemnitz，原位纳米压痕工具将首次允许进行局部微机械测试，并结合对变形、转变或破坏过程的表征。

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.