本文件规定了根据应力强度因子确定断裂韧性的方法 （K） ，裂纹尖端张开位移或CTOD（δ）和焊缝J积分的实验等效值 在金属材料中（J）。本文件是对ISO 12135的补充，ISO 12135涵盖了母材断裂韧性测试的所有方面 需要与本文件一起使用的金属和金属。本文档描述了这些方法 用于确定断裂韧性的点值。不应将其视为获得 有效R曲线（抗裂纹扩展曲线）。然而，样品制备方法 在确定R时，可以使用本文件中描述的- 焊缝曲线。这个 方法使用焊接后在特定目标上有缺口的疲劳预裂纹试样 焊接区域。描述了用于评估焊缝是否适合在焊缝内放置切口的方法 位于焊缝金属内或焊缝热影响区（HAZ）内的目标区域，以及 然后，在适当的情况下，评估在这些区域取样时疲劳裂纹的有效性。交叉引用:ISO 12135:2016BS 7910:2013+A1:2015ISO 3785购买本文件时可获得的所有现行修订均包含在购买本文件中。

This document specifies methods for determining fracture toughness in terms of stress intensity factor (K), crack tip opening displacement or CTOD (δ) and experimental equivalent of the J-integral for welds in metallic materials ( J).This document complements ISO 12135, which covers all aspects of fracture toughness testing of parent metal and which needs to be used in conjunction with this document. This document describes methods for determining point values of fracture toughness. It should not be considered a way of obtaining a valid R-curve (resistance-to-crack-extension curve). However, the specimen preparation methods described in this document could be usefully employed when determining R-curves for welds. The methods use fatigue precracked specimens which have been notched, after welding, in a specific target area in the weld. Methods are described to evaluate the suitability of a weld for notch placement within the target area, which is either within the weld metal or within the weld heat-affected zone (HAZ), and then, where appropriate, to evaluate the effectiveness of the fatigue crack in sampling these areas.Cross References:ISO 12135:2016BS 7910:2013+A1:2015ISO 3785All current amendments available at time of purchase are included with the purchase of this document.