The hoop and axial residual stress maps in an engineering-scale narrow-gap austenitic stainless pipe girth weld were obtained with the two-cut contour method and the stress distribution characteristics are discussed. Results show that the through-thickness hoop stress at the weld centreline demonstrates a bending-type distribution; the cap beads and the root weld have great effects on the axial stress distribution pattern at the weld centreline; the weld start/end cause stress fluctuation in the cap weld; the locations of peak hoop stress and axial stress do not change significantly within a large range of R/t and heat inputs for stainless girth welds.

中文翻译：

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某工程管环焊缝残余应力分布试验研究

采用二切等高线法获得工程规模窄间隙奥氏体不锈钢管环焊缝环向和轴向残余应力图，讨论应力分布特征。结果表明，焊缝中心线处的全厚环向应力呈弯曲型分布；帽焊道和根部焊缝对焊缝中心线处的轴向应力分布模式有很大影响；焊接开始/结束导致帽焊中的应力波动；对于不锈钢环焊缝，峰值环向应力和轴向应力的位置在较大的 R/t 和热输入范围内不会发生显着变化。