ABSTRACT This paper describes specific results from a unique study which involves design, manufacture and internal pressure testing of two Grade 91 steel vessels. The vessel results which are the focus of this paper relate to the creep behaviour of the closures and the associated pressure boundary welds. All the end fittings used in the vessels were consistent with arrangements allowed by typical design codes. Similar parts can be found in power boilers and other high energy components. The results are discussed in terms of creep crack initiation and the potential for fast fracture for the individual geometries.

中文翻译：

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长期 91 级钢部件测试中的蠕变损坏

摘要 本文描述了一项独特研究的具体结果，该研究涉及两个 91 级钢容器的设计、制造和内部压力测试。作为本文重点的容器结果与封闭件的蠕变行为和相关的压力边界焊缝有关。容器中使用的所有端部配件均与典型设计规范允许的布置一致。类似的部件可以在动力锅炉和其他高能部件中找到。结果根据蠕变裂纹萌生和单个几何形状的快速断裂可能性进行了讨论。