Dr. Nathir Rawashdeh, assistant professor, Applied Computing, has published a paper in the Journal of Materials Engineering and Performance. The paper, titled, “In situ Passive Infrared Thermography Application for the Assessment of Localized Mechanical Properties of Tungsten Inert Gas-Welded Inconel 625 Alloys,” was published January 20, 2022.
The co-authors of the paper are Anas M. Atieh and Diala Bani Mostafa, both with the School of Applied Technical Sciences at German Jordanian University, Amman, Jordan.
Rawashdah is a member of the Institute of Computing and Cybersystems’s (ICC) Center for Data Sciences (DataS). His research interests include image processing, autonomous vehicles, mobile robots, mechatronics, and applied artificial intelligence.
Traditional evaluation of weld joint mechanical properties by destructive testing shows the limitations of these methods, including equipment limitations, high materials/testing cost, and challenging repeatability. This work presents an experimental approach for utilizing passive infrared thermography and tensile testing to evaluate the correlation between thermal and localized TIG-welded Inconel 625 joints’ mechanical properties. The results show that different areas of interest deform differently during the tensile test. The dog-bone shaped TIG-welded samples were divided into five regions of interest on both sides of the weldment, of which two are repetitive on both sides of the sample representing Inconel 625 base metal alloy, heat-affected zones, and weld beads. The temperature change rate in these three regions varied from 0.17 to 0.67°C per minute as the tensile test progresses. The fractography analysis showed that the failure occurred within the weld beads, even though the highest temperature was observed in the heat-affected zones, suggesting higher strength in the heat-affected zones. The improvement mechanism introduced in this work utilizes thermography visualization to predict weld failure as nonlinear elongations are observed across different stages during the tensile tests.
Rawashdeh, N.A., Atieh, A.M. & Bani Mostafa, D. In situ Passive Infrared Thermography Application for the Assessment of Localized Mechanical Properties of Tungsten Inert Gas-Welded Inconel 625 Alloys. J. of Materi Eng and Perform (2022). https://doi.org/10.1007/s11665-021-06506-5