Test data for uniaxial creep on material ALLOY 800H at 950 Celsius and a stress of 9.5 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，均为德意志联邦共和国及北莱茵-威斯特伐利亚州的高温反应堆（High Temperature Reactor）项目（直接循环氦气涡轮机项目、核工艺热项目与区域供热项目）所测定，旨在对最高服役温度可达950℃的候选结构合金开展服役资质认证。针对每种合金开展了多炉批次的试验研究，并重点考察了服役环境对材料性能的影响：所述服役环境包括含氢、水蒸气、一氧化碳、甲烷等微巴量级微量杂质气体的氦气，以及甲烷重整混合气体。在试验设备中，此类试验环境会引发试样渗碳现象。然而数据分析结果表明，在各测试温度下，空气、不纯氦气及甲烷重整气体环境下的应力断裂数据均处于同一散射带内。

该数据集曾用于制定高温反应堆系统的核设计规范草案，相关内容总结于《高温反应堆（High Temperature Reactor，HTR）结构设计准则研讨会论文集》，作者为G Breitbach、F Schubert、H Nickel，会议编号Jül-Conf-71，1989年4月，刊载于于利希核研究中心股份有限公司（Kernforschungsanlage Jülich GmbH）报告，国际标准刊号ISSN 0344-5798。