Abstract Presently most structural integrity assessment procedures still allow the use of Charpy-V notch impact tests as a measure of fracture toughness. The use is generally made through some more or less reliable correlations between standard Charpy-V notch energy and fracture toughness or tearing resistance. A problem arises if the structure has such a geometry that standard size Charpy-V notch specimens cannot be used. Application standards contain some guides on how to convert sub-sized specimen data to correspond to full size specimens, but these are often inaccurate and limited in their application range. Procedures like ASTM A370, BS7910 and API 579 give some advice on the use of sub-sized Charpy-V specimens but none of them cover the whole Charpy-V transition curve, nor all possible specimen dimensions. Here, a new simple procedure is presented. It is shown that it is applicable over the whole transition curve, thus enabling a point-wise conversion of sub-sized and miniature Charpy-V data to correspond to full size specimens. The new procedure is applicable for steel strengths ranging from 200 MPa to 1400 MPa.

中文翻译：

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亚尺寸和微型 CVN 试样转换方法

摘要 目前，大多数结构完整性评估程序仍然允许使用 Charpy-V 缺口冲击试验作为断裂韧性的量度。通常通过标准夏比-V 型缺口能量与断裂韧性或抗撕裂性之间的一些或多或少可靠的相关性来进行使用。如果结构的几何形状无法使用标准尺寸的 Charpy-V 缺口试样，则会出现问题。应用标准包含一些关于如何将小尺寸试样数据转换为与全尺寸试样相对应的指南，但这些指南通常不准确且应用范围有限。ASTM A370、BS7910 和 API 579 等程序就使用小尺寸 Charpy-V 试样提供了一些建议，但它们都没有涵盖整个 Charpy-V 过渡曲线，也没有涵盖所有可能的试样尺寸。这里，介绍了一个新的简单程序。结果表明，它适用于整个过渡曲线，从而能够对小尺寸和微型 Charpy-V 数据进行逐点转换，以对应于全尺寸样品。新程序适用于 200 MPa 至 1400 MPa 的钢强度。