Test data for low cycle fatigue - strain control on material U 720 carb 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.

本研究作为欧盟第五框架科研计划（Framework Programme 5, FP5）下HTR-M1高温反应堆项目整体测试计划的组成部分，欧盟联合研究中心能源与运输研究所（Joint Research Centre - Institute for Energy and Transport, JRC-IET）针对镍基高温合金Udimet 720开展了一系列单轴蠕变与低周疲劳（low-cycle fatigue, LCF）测试，旨在评估特定高温反应堆（High Temperature Reactor, HTR）运行环境的影响。测试覆盖原始态、高渗碳态、脱碳态及热老化态四类材料。其中高渗碳态样品通过在1.6巴绝对压力的氩气与2%甲烷混合气氛中，于950摄氏度下暴露1000小时制备获得。