Experimental investigation on residual stress distribution in an engineering-scale pipe girth weld

Abstract

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.

Statistical analysis of residual stresses in austenitic pipe girth welds

“…Measurement techniques used within the proposed database include a combination of DHD, ND and CM (discussed in greater detail in other reports [16,17]).

Figure 3 Experimental through-thickness residual stress profiles gathered from literature illustrating comparison between austenitic and ferritic pipe girth weld measurements using a combination of DHD, ND and CM with BS 7910 low heat input upper bound [12,27–34].

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“…Figure3. Experimental through-thickness residual stress profiles gathered from literature illustrating comparison between austenitic and ferritic pipe girth weld measurements using a combination of DHD, ND and CM with BS 7910 low heat input upper bound[12,[27][28][29][30][31][32][33][34].…”