Test data for uniaxial creep on material ALLOY 800H at 800 Celsius and a stress of 19.98 MPa

The creep rupture data in this collection were determined for the high temperature reactor projects (the direct cycle helium turbine project, the nuclear process heat project and the district heating project) of the Federal Republic of Germany and the State of North Rhine Westphalia, the aim being to qualify the candidate constructional alloys for service at temperatures up to 950°C. Several batches of each alloy were investigated and special attention was given to the effects of the service environments (helium containing different impurity gases, such as hydrogen, water vapour, carbon monoxide and methane, all at microbar levels, and methane reforming gas mixture) on the properties. In the test machines, these test environments led to carburisation of test pieces. However, analysis of the data showed that the stress rupture data for tests in air, in impure helium and in methane reforming gas lay in the same scatterband at each temperatures tested.

The data were used for the formulation of draft nuclear design rules for the high temperature reactor systems, which are summarised in 'Proceedings of the Workshop on Structural Design Criteria for HTR', G Breitbach, F Schubert, H Nickel, Jül-Conf-71, April 1989, Berichte der Kernforschungsanlage Jülich GmbH, ISSN 0344-5798.

本数据集收录的蠕变断裂数据，针对联邦德国与北莱茵-威斯特伐利亚州的高温反应堆项目（直接循环氦气涡轮机项目、核工艺热项目及区域供热项目）测得，旨在评定可在最高950℃工况下服役的候选结构合金的资质。研究团队对每种合金开展多炉批次测试，并重点关注服役环境对材料性能的影响：试验环境包括含微量（微巴级）氢、水蒸气、一氧化碳、甲烷等杂质气体的氦气，以及甲烷重整混合气体。测试过程中，上述试验环境会导致试样发生渗碳现象。不过数据分析显示，在各测试温度下，空气、不纯氦气及甲烷重整气体环境下测得的应力断裂数据均处于同一离散带内。
本数据集已用于高温反应堆系统核设计规范草案的编制，相关内容总结于《高温气冷堆（High Temperature Reactor, HTR）结构设计准则研讨会论文集》（G Breitbach、F Schubert、H Nickel 编，Jül-Conf-71，1989年4月，于利希核研究中心股份有限公司报告，ISSN 0344-5798）。