Frank Chen, Ph.D.
Oak Ridge National Lab
Fracture toughness represents a material’s capability to resist fracture failure in the presence of flaws and defects. It is one of the most important properties in assessing the structural integrity of many engineering components. In certain applications, materials may experience extreme environments, such as neutron irradiation, elevated temperatures, etc. Characterizing materials fracture toughness at service conditions becomes vitally important, albeit it also imposes significant challenges in applying conventional fracture toughness testing and analysis techniques. In this presentation, I will describe two recent developments in addressing such challenges. Firstly, I will present the development of a small specimen testing technique for characterizing the transition fracture toughness of reduced activation ferritic/martensitic (RAFM) steels for fusion applications. Secondly, I will present the development of open-source software for performing automated J-integral vs. crack growth resistance (J-R) curve analysis based on the ASTM E1820-18 normalization method.
Materials Science & Engineering Dept.