Full 3D spatially resolved mapping of residual strain in a 316L austenitic stainless steel weld specimen
Full 3D spatially resolved mapping of residual strain in a 316L austenitic stainless steel weld specimen
复制标题
316L 奥氏体不锈钢焊缝试样中残余应变的全 3D 空间分辨映射
DOI：
10.1016/j.msea.2010.03.110
复制
发表时间：
2010
期刊：
影响因子：
6.4
通讯作者：
Koenraad Decroos
中科院分区：
文献类型：
--
作者：
R. Martins;C. Ohms;Koenraad Decroos
奥氏体不锈钢316L的三道槽焊接试样，制造用于基准有限元焊接残余应力模拟代码的目的，目前正在研究网络内进行广泛的表征。这里介绍了一个全面的数据集，从非破坏性的全三维空间分辨宏观应变映射在这个标本。聚焦高能同步辐射与螺旋狭缝技术一起被用来获得有关晶格参数变化的深度分辨信息。一种新的全谱分析方法，从单个晶粒的不同衍射斑点的评价的基础上，开发。结果表明，高拉伸横向应力内的珠第一沉积。最大纵向应力出现在槽下。此外，观察到显著的焊接开始和停止效应。结果的有效性进行了讨论相对于由于塑性变形的晶间应变的可能影响。
A three-pass slot weld specimen in austenitic stainless steel 316L, manufactured for the purpose of benchmarking Finite Element weld residual stress simulation codes, is currently undergoing extensive characterization within a research network. A comprehensive data set from non-destructive full three-dimensional spatially resolved macro-strain mapping in this specimen is presented here. Focussed high-energy synchrotron radiation together with the spiral slit technique was used to obtain depth-resolved information about the variation of lattice parameters. A novel full-pattern analysis approach, based on the evaluation of distinct diffraction spots from individual grains, was developed. The results show high tensile transverse stresses within the bead deposited first. The maximum longitudinal stresses were found beneath the slot. Furthermore significant weld start- and stop-effects were observed. The validity of the results is discussed with respect to the possible impact of intergranular strains due to plastic deformation.