Volume 21, Issue 2, April 2016, Pages 310–320
K. Kalaiselvan1, A. Elango2, and NM. Nagarajan3
1 Department of Mechanical Engineering, Meenakshi Ramasamy Engineering College, Ariyalur, Tamilnadu, India
2 Vice Principal, Alagappa Chettiyar College of Engineering and Technology, Karaikudi, Tamilnadu, India
3 Professor (Retd), Department of Mechanical Engineering, National Institute of Technology, Calicut, Kerala, India
Original language: English
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Laser beam welding of light weight and high strength Ti and Al alloy is very attractive for aerospace and automotive industries. The development of dissimilar welding is having a bearing on maximum temperature at the weldment and heat transfer rate in heat affected zone. Also grain coarsening may cause if the thermal cycle is not properly checked. For maintaining good mechanical properties of the weld joints, phase transformation during rapid thermal cycles is required. Such cycles occur during welding of Ti/Al sheets and heat treatment after welding. Ti and Al alloys are sensitive to heat due to their high difference in melting temperatures. This may cause changes in microstructures infusion and heat affected zones. The aim of this study is to examine the changes in the microstructures, heat affected zones of the TI6AL4V (Ti) and AA2024 (Al) alloy thin sheets welded joint using SEM and EDS analysis of different variants before and after precipitation hardening. Test results reveal that laser arc, focusing on Ti side gives better-refined age hardened structure than from Al side, and EDS analysis is also supporting the view.
Author Keywords: Laser beam welding, Ti, Al/Age hardening, SEM, EDS.
K. Kalaiselvan1, A. Elango2, and NM. Nagarajan3
1 Department of Mechanical Engineering, Meenakshi Ramasamy Engineering College, Ariyalur, Tamilnadu, India
2 Vice Principal, Alagappa Chettiyar College of Engineering and Technology, Karaikudi, Tamilnadu, India
3 Professor (Retd), Department of Mechanical Engineering, National Institute of Technology, Calicut, Kerala, India
Original language: English
Copyright © 2016 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Laser beam welding of light weight and high strength Ti and Al alloy is very attractive for aerospace and automotive industries. The development of dissimilar welding is having a bearing on maximum temperature at the weldment and heat transfer rate in heat affected zone. Also grain coarsening may cause if the thermal cycle is not properly checked. For maintaining good mechanical properties of the weld joints, phase transformation during rapid thermal cycles is required. Such cycles occur during welding of Ti/Al sheets and heat treatment after welding. Ti and Al alloys are sensitive to heat due to their high difference in melting temperatures. This may cause changes in microstructures infusion and heat affected zones. The aim of this study is to examine the changes in the microstructures, heat affected zones of the TI6AL4V (Ti) and AA2024 (Al) alloy thin sheets welded joint using SEM and EDS analysis of different variants before and after precipitation hardening. Test results reveal that laser arc, focusing on Ti side gives better-refined age hardened structure than from Al side, and EDS analysis is also supporting the view.
Author Keywords: Laser beam welding, Ti, Al/Age hardening, SEM, EDS.
How to Cite this Article
K. Kalaiselvan, A. Elango, and NM. Nagarajan, “SEM studies on age hardened Laser welded dissimilar Ti/Al sheet metal weldments,” International Journal of Innovation and Scientific Research, vol. 21, no. 2, pp. 310–320, April 2016.
