Residual stresses in welded joints are often of extended interest in order to evaluate unexpected failures or distortions. Since the possibilities to calculate residual stresses in welds are still strongly limited, the measurement techniques are still of great importance. Several measurement techniques with particular possibilities and limitations are available today where especially the different diffraction methods are used mostly. The material, weld type, and the size of the components are important for the quality of the results obtained with different methods as well as the environment where the measurements have to be carried out. The paper shall give an overview of the results of a round robin test on the application of XRD on butt welded joints which has been carried out in cooperation of different experienced laboratories. The results show the high reliability of XRD measurements in welds, if the measurements are performed under well-defined boundary conditions. The experiences can be used as a recommendation about useful measurement conditions the expectable quality of the results.

焊接接头中的残余应力经常引起人们的关注，以评估意外的故障或变形。由于计算焊接残余应力的可能性仍然受到很大的限制，因此测量技术仍然非常重要。如今，有几种具有特殊可能性和局限性的测量技术可供使用，其中特别是大多数使用不同的衍射方法。材料，焊接类型和部件的尺寸对于使用不同方法获得的结果的质量以及必须执行测量的环境至关重要。本文应概述XRD在对接焊缝上应用XRD的循环试验的结果，该试验是在不同经验实验室的合作下进行的。结果表明，如果在定义明确的边界条件下进行XRD测量，则焊缝具有很高的可靠性。这些经验可以用作有关有用的测量条件，预期结果质量的建议。