Joining of Ti-6AL-4V to AISI 304 Stainless Steel using Laser Spot Welding with Circular Technique

Subject Areas : Journal of Environmental Friendly Materials

M Rafi ¹ ( Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran. )
H Sabet ² ( Department of Materials Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran. )
V Abouei Mehrizi ³ ( Advanced Materials Engineering Research Center,Karaj Branch, Islamic Azad University ,Karaj, Iran )
A Anbarzadeh ⁴ ( Department of Mechanical Engineering, Technical and Vocational University (TVU), Tehran, Iran )

Received: 2022-02-20 Accepted : 2022-05-30 Published : 2022-06-01

Keywords:

Abstract :

In this research, dissimilar laser spot welding of the Ti-6Al-4V and AISI 304 (stainless steel) was investigated. The joining of 0.7 and 0.5 mm thickness plates with using a copper interlayer of 0.2 and 0.3 mm in thickness was performed by LSW. A 400-W Nd: YAG laser pulse welding machine was used to obtain coaxial spot welds of 4 mm in diameter with circular technique. Visual inspection and metallographic examination were used for all samples. If no crack was identified, micro-Vickers hardness test, tensile test, and scanning electron microscopy (SEM) were performed on the samples. The result indicated that with a copper interlayer and 10.7 J heat input on peak power of 1.5 kW, welding frequency 15 Hz, and welding time of 7 ms, leading to an ultimate strength of 160 MPa. In addition the result indicated that applying the circular technique by creating adjacent spot welds can produce a good joint.