Abstract
It has been well known that the ductile-brittle transition temperature (DBTT) of each weld structure or its shift (ΔDBTT) from parent material is one of the very useful measures of the fracture characteristics in steel weldment. In order to present an applicability of small punch (SP) test technique to weldments, in this study, a fracture strength of microstructure at any localized region of interest on HAZ, weld metal and parent material in two steels was evaluated by using DBTT or ΔDBTT obtained from the SP test in relation to the data obtained from the COD test. The empirical correlation, (ΔDBTT) SP ⋟0.55 (ΔDBTT) COD , was obtained from the SP and COD test. In addition, the effects of test materials, that is the microstructures of welded region and the orientations of specimens etc, did not appear at the empirical correlation.
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Lyu, D.Y., You, H.S., Yoon, J.Y. et al. Fracture strength evaluation of welded steel joint by means of small punch test. KSME Journal 6, 73–80 (1992). https://doi.org/10.1007/BF02953073
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DOI: https://doi.org/10.1007/BF02953073