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http://dx.doi.org/10.7781/kjoss.2012.24.6.693

Effects of Welding Processes on the Low Temperature Impact Toughness of Structural Steel Welded Joints  

Lee, Chin Hyung (Structural Engineering Research Division, KICT)
Shin, Hyun Seop (Structural Engineering Research Division, KICT)
Park, Ki Tae (Structural Engineering Research Division, KICT)
Publication Information
Journal of Korean Society of Steel Construction / v.24, no.6, 2012 , pp. 693-700 More about this Journal
Abstract
In this study, the Charpy impact test along with metallurgical observation was conducted to evaluate low temperature impact toughness of structural steel welds with different welding processes to find out the optimal welding process to guarantee the required impact toughness at low temperatures. The welding processes employed are shield metal arc welding (SMAW) and flux cored arc welding(FCAW), which are commonly used welding methods in construction. The Charpy impact test is a commercial quality control test for steels and other alloys used in the construction of metallic structures. The test allows the material properties for service conditions to be determined experimentally in a simple manner with a very low cost. To investigate the impact toughness at low temperatures of the steel welds, specimens were extracted from the weld metal and the heat affected zone. Standard V-notch Charpy specimens were prepared and tested under dynamic loading condition. The low temperature impact performance was evaluated based on the correlation between the absorbed energy and the microstructure. Analysis of the results showed that the optimal welding process to ensure the higher low temperature impact toughness of the HAZ and the weld metal is SMAW process using the welding consumable for steels targeted to low temperature use.
Keywords
cold regions; structural steel welds; charpy impact test; low temperature impact toughness; welding process;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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