Influence of Deformation Induced Martensite Formation on the Mechanical Properties of Metastable Austenite (B05)

该项目的目标是将亚稳奥氏体Cr-Ni钢的疲劳性能从LCF提高到VHCF制度，这是由于变形诱导马氏体形成的结果，定义的表面加工工艺。除了表面硬化和残余应力状态，显微组织参数，如马氏体的体积分数，厚度和分布进行了详细的研究。的微观结构参数进行量化的光和电子显微镜以及X射线衍射方法和它们对疲劳和磨损行为的影响将通过电和磁原位测量进行评估。

The goal of this project is the improvement of the fatigue properties from the LCF to the VHCF regime of metastable austenitic Cr-Ni-steels due to deformation induced martensite formation as a consequence of defined surface machining processes. Besides surface hardening and residual stress state, microstructural parameters such as volume fraction, thickness, and distribution of the martensite are studied in detail. The microstructural parameters are quantified by light- and electron-microscopy as well as x-ray diffraction methods and their influence on fatigue and wear behaviour will be evaluated by electrical and magnetic in situ measurements.