Influence of the Surface State on Quasi-static and Cyclic Deformation and Damage Behavior of TRIP/TWIP Steels (B10)

本项目的目的是研究表面形态对基于Mn-Al-Si概念的高合金化奥氏体钢TRIP/TWIP力学行为的影响。为此，通过微观和宏观加工在CRC926中制造的特定表面形貌用光学显微镜、电子显微镜和X射线衍射进行了表征。通过扫描电子显微镜的原位力学试验和疲劳试验以及随后的近表面微观结构的非原位分析，评估了它们对准静态和循环性能的影响。随后，高性能和耐磨链销的第一批原型将与子项目C02合作制造和测试。

The goal of this project is to investigate the influence of the surface morphology on the mechanical behavior of high-alloyed austenitic TRIP/TWIP steels based on the Mn-Al-Si concept. For this, specific surface morphologies manufactured within the CRC 926 by micro and macro machining is characterized by light and electron microscopy as well as X-ray diffraction. Their influence on the quasi-static and cyclic properties is evaluated by in situ-mechanical testing in the SEM as well as by fatigue tests with subsequent ex situ analysis of the near-surface microstructure. Later, first prototypes for high performance and wear resistant chain pins will be manufactured and tested in collaboration with subproject C02.