|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Advanced High-strength Steels
||G-9: Solidification Cracking in High-strength Low Alloy Steels
||Maddie McAllister, Eric A. Gulliver, Michael Kottman, Badri K. Narayanan
|On-Site Speaker (Planned)
High-strength low alloy steels have been broadly adopted by industries ranging from transportation to automotive. Many of these steels contain relatively high levels of carbon, and defects can occur if additional carbon is introduced during welding. Higher carbon content can alter weld metal phase distributions and increase susceptibility to impurities that can lead to solidification cracking, especially where high dilution of base metal into the weld metal occurs. In an assessment of carbon content on solidification cracking, CALPHAD modeling was used to predict the threshold carbon content at which austenite forms preferably to delta ferrite and increases vulnerability to cracking. SAW weld samples were prepared with carbon levels above and below the threshold and characterized using XRF, SEM, DSC and optical microscopy methodologies. Total crack length was compared to weld composition. DSC analysis of phase transitions was used to evaluate the accuracy of CALPHED modeling with respect to these materials.
||Planned: Supplemental Proceedings volume