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Experimental Studies on Joinability of SWS 490A High Tension Steel using Acoustic Emission Signals  

Rhee Zhang-Kyu (인천대학교 기계공학과)
Woo Chang-Ki (인천대학교 기계공학과)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.14, no.3, 2005 , pp. 87-95 More about this Journal
Abstract
The object of this study is to investigate the effect of joinability by using acoustic emission(AE) signals and doing a pattern recognition for weld heat affected zone(HAZ) in tensile testing. This study was carried out an SWS 490A high tension steel for electric shielded metal arc welding(SMAW), $CO_2$ gas arc welding and TIG welding. And correspondingly, the root openings are 3, 4 and 2.8mm. The results of the tensile test of weld HAZ come out electric shield arc welding $>\;CO_2$ gas arc welding > TIG welding in case of single welding. It is believed that this is a phenomenon where difference of its root opening or base metal thickness. Also, the technique of AE is ideally suited to study variables which control time and stress dependent fracture or damage process in metallic materials.
Keywords
Acoustic Emission; Heat Affected Zone; Root Opening; Joinability; SWS 490A High Tension Steel; Pattern Recognition; Frequency Analysis;
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