Journal
ENGINEERING FAILURE ANALYSIS
Volume 94, Issue -, Pages 226-231Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.engfailanal.2018.08.009
Keywords
K-TIG welding; Microstructure; Grain boundary misorientation; Impact toughness
Funding
- Science and Technology Planning Project of Guangdong Province [2015B010919005]
- Science and Technology Planning Project of Guangzhou City [201604046026]
- National Natural Science Foundation of China [51374111]
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Keyhole tungsten inert gas (K-TIG) welding is a novel, high-efficiency welding method. In this study, 10.8-mm-thick duplex stainless steel (DSS) plates were welded via K-TIG welding, without groove preparation or filler metals. The microstructure, grain size and grain boundary misorientation angle distribution (GBMAD) of the weld metal (WM) were analyzed to characterize its impact toughness. Charpy impact tests were carried out, and the results proved that the impact absorbed energy (IAE) of the WM increases with the increase in heat input. This finding indicates that the austenite volume fraction and the GBMAD have an influence on the impact property of the WM.
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