Pulsed Laser Processing of Dissimilar Ti-6Al-4V and X5CrNi18-10 Joints

Abstract

Welding of Ti-alloys with stainless steels is a difficult task due to the formation of brittle intermetallic compounds, and the use of intermediate materials is a possible solution to surpass this problem. The joining of Ti-6Al-4V alloy with X5CrNi18-10 steel, using a Cu interlayer, was analyzed as a function of the Nd:YAG pulsed laser welding parameters, with focus on the effects on the integrity, microstructure, and the properties of the resulting joints. The quality of the joint is determined by the interface developed between the Cu interlayer and the Ti-alloy. An improvement of the properties was observed to be influenced by the limitation of the component mixing in the melt and by interfacial phenomena favoring the solidification process, especially at Ti-alloy interface.

Keywords:

• Dissimilar
• Intermetallics
• Lasers
• Microstructure
• Stainless
• Titanium
• Welding

Notes

*Offset from the Cu–stainless steel interface (see Fig. 1 for details).