Test data for low cycle fatigue - strain control on material U 720 decarb at 650 Celsius

As a part of the overall test programme of FP5 HTR-M1 Project, JRC-IET performed a series of uni-axial creep and low-cycle fatigue (LCF) tests on the nickel based superalloy Udimet 720 material with the objective of assessing the effect of a specific HTR operating environment. Tests were performed on as-received, heavily carburized, decarburized, and thermally aged material. The heavily carburized state was achieved by exposure for 1000h at 950 Celsius in a 1.6 bar absolute Argon+2%CH4 atmosphere.