Study on wet underwater welding. Report 2 Impact values and fatigue strength of weld metals of high strength steel.

Yara, Hideo; Makishi, Yasuji; Kikuta, Yoneo; Matsuda, Hukuhisa

doi:10.2207/qjjws.2.721

Cited by 1 publication

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“…[1][2][3] This has made it very important to assess the susceptibility of different welding materials to transverse cracking, leading to the development and use of such methods as the oblique Y groove cracking test, TRC test, G-BOP test, U shaped test and window type restraint cracking test. [4][5][6][7][8] Among these, only the G-BOP test can be used to assess transverse cracking susceptibility directly, yet even this is unable to obtain a result if more than two welding materials are tested. There is therefore clearly a need to develop a new testing method that can provide a quantitative index of the transverse cracking resistance of different welding materials.…”

Section: Introductionmentioning

confidence: 99%

New method of assessing susceptibility of welds to transverse cracking

Cheng

Zhang

et al. 2016

Science and Technology of Welding and Joining

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A method for assessing the susceptibility of a weld to transverse cracking is proposed based on a newly designed test specimen featuring a transverse gap in the centre to control restraint and produce a large residual stress in the weld metal. Through FEM simulation of the effects of the weld bead length on the longitudinal residual tensile stress (s x ) after welding, it is confirmed that the transverse gap can significantly increase s x after welding. Furthermore, with a fixed transverse gap length, s x increases monotonically with the length of the weld bead. Two different commercial weld wires were used to check the effectiveness of this method; the experimental results obtained indicate that the critical cracking length of the weld bead differs depending on the weld wire used. The critical length of the weld bead can therefore be used as an effective index of its susceptibility to transverse cracking.

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