|About this Abstract
||Materials Science & Technology 2019
||Joining of Advanced and Specialty Materials XXI
||Weld Seam Characteristics of Roll Formed TRIP690 Tubes
||Alexander Bardelcik, Bharathwaj Ananthapillai
|On-Site Speaker (Planned)
Continuously roll formed advanced high strength steel (AHSS) tubes with longitudinal induction seam welds are used in variety of automobile lightweighting applications. The straight tubes are typically followed by subsequent bending and hydroforming process, therefore the quality of the weld seam and its resistance to failure under these severe deformation modes is of utmost importance. In this work, a TRIP690 steel was roll formed with varying process parameters (weld power and frequency) and the resulting weld characteristics were investigated. One of the TRIP690 components is retained austenite, which was quantified throughout the weld heat affected zone (HAZ). A field emission scanning electron microscope (FESEM) and electron backscatter diffraction (EBSD) measurements were made to characterize and quantify the weld microstructures and identify the properties of the heat affected zone. The hardness profile was also quantified throughout the welds to identify the effect of the weld process parameters.