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http://dx.doi.org/10.14775/ksmpe.2021.20.07.008

Fracture Toughness Comparison of Weld Metal and Heat-Affected Zone of Brittle Crack Arrest Steel Welding Joint  

Choi, Kyung-Shin (Department of Mechanical Design Engineering, Changwon National University)
Kong, Seok-Hwan (Department of Mechanical Design Engineering, Changwon National University)
Seol, Sang-Seok (Department of Mechanical Design Engineering, Changwon National University)
Chung, Won-Jee (Department of Mechanical Design Engineering, Changwon National University)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.7, 2021 , pp. 8-14 More about this Journal
Abstract
Even welds that have passed non-destructive testing in the case of brittle crack arrest steel materials will actually have very fine weld defects. Based on studies showing that these defects adversely affect the structure if subjected to a certain period of load, the following conclusions were obtained by conducting CTOD tests on welding joints of high-strength BCA materials, structures comprising the upper decks of a large container vessel. First of all, the fatigue pre-cracking in the weld metal and heat affected areas was tested and the behavior was identified. Both parts of the welding joint are allowable range for the class regulations. In addition, CTOD results showed that the CTOD value in the heat affected area was more than 0.5 times higher than in the weld metal area.
Keywords
BCA(Brittle Crack Arrest); CTOD(Crack Tip Opening Displacement); Weld-Metal; Heat-affected Zone; Stress Intensity Factor;
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  • Reference
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