Experimental Investigation on Applicability of Stress Field Parametter FI for Weld Hydrogen Cracking
1982 Volume 51 Issue 2 Pages 105-111
Details
1982 Volume 51 Issue 2 Pages 105-111
Stress field parameter FI. which controls the stress level in the vicinity of the root of first-pass weld and the notch of the Implant specimen has been proposed by the authors as a controlling parameter for weld hydrogen cracking. The previous papers reveal that the correlation between Implant test results and RRC/TRC test results of 80 kg/mm2 high strength steel (HT80) can be explained with fair accuracy by using the stress field parameter FI.
In the present paper, adresses applicability of the stress field parameter FI to cover not only HT80 steel but also 50 kg/mm2 high strength steel (HT50). Moreover, it proposes the applicability of the parameter FI for the another H type crack test.
The FI parameter newly proposed in the present paper proved applicable for considering the correlation between the deep notch Implant test and the RRC/TRC test for not only HT80 steel but also HT50 steel under the same conditions in the testing of both the remaining hydrogen content HR100 and the HAZ microstructure.
The FI-parameter is affected by the various geometrical factors of the root weld. The FI-value calculated by using the average geometrical parameter can be applied to consider the correlation anong the various cracking tests.
