Test data for uniaxial tensile on material INCONEL 617 irr at 20 Celsius

The Alloy 617 creep rupture data 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 alloy for service at temperatures up to 950°C. Alloy 617 was the prime candidate alloy for construction of the He-He intermediate heat exchanger and hot gas ducting. Several batches and product forms (forged bar, rolled plate, pipes and tubes) of the 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 scatter band at each temperature tested.

The creep rupture tests were carried out in single-specimen and multi-specimen test machines. In the single specimen machines the strain was continuously monitored and strain readings were taken once a day. In the multi-specimen test rigs, there were six strings, each with a different load. There were up to eight test pieces per string and strain measurements were made by interrupting the tests, cooling to room temperature, then measuring the length of each test piece using a travelling microscope. Test interruptions for strain measurements were generally every 1000 h. The tests were carried out according to the German Standard DIN 50118 (1982).

The data (secondary creep rate, time to 1% strain, time to rupture) 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.

In addition to the creep rupture data, Alloy 617 tensile properties, low cycle fatigue and creep crack growth data are stored in MatDB.

617合金（Alloy 617）蠕变断裂数据（creep rupture data）系为德意志联邦共和国与北莱茵-威斯特伐利亚州的高温堆项目（直接循环氦气轮机项目、核工艺热项目及区域供热项目）所测定，目的是评定该合金在最高950℃温度下的服役适用性。617合金是氦-氦中间热交换器与热气体管道建造的首选候选合金。本次研究覆盖了该合金的多个批次与多种产品形态（锻造棒材、轧制板材、管材），并重点关注了服役环境对其性能的影响，服役环境包括含氢、水蒸气、一氧化碳、甲烷等微量杂质（分压为微巴级）的氦气，以及甲烷重整混合气。在试验设备中，上述试验环境会导致试件发生渗碳。但数据分析表明，在各试验温度下，空气、不纯氦气及甲烷重整气环境中测得的应力断裂数据均处于同一分散带内。

蠕变断裂试验采用单试件试验机与多试件试验机开展。单试件试验机可连续监测应变，每日记录一次应变数据。多试件试验台共设6组加载工况各异的串列，每组最多搭载8个试件；应变测量需通过中断试验、冷却至室温后，使用读数显微镜测量每个试件的长度来完成，应变测量的试验中断周期通常为每1000小时一次。所有试验均符合德国标准DIN 50118（1982）。

本次试验获取的数据（次蠕变速率、1%应变达到时间、断裂时间）被用于制定高温堆（HTR）系统的核设计规范草案，相关内容总结于 'Proceedings of the Workshop on Structural Design Criteria for HTR'，作者：G Breitbach、F Schubert、H Nickel，文献编号：Jül-Conf-71，1989年4月，Berichte der Kernforschungsanlage Jülich GmbH报告，ISSN 0344-5798。

除蠕变断裂数据外，617合金的拉伸性能、低周疲劳及蠕变裂纹扩展数据也存储于MatDB数据库中。