Defect formation during welding and their effect on mechanical properties of Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo

Welded structures and components are prerequisites for cost effective manufacturing of aero engine parts. A main objective of this project is to explain why pores/defects are formed for certain welding parameters in laser welding; being the chosen welding method because of its importance. Since all types of pores/defects do not affect the mechanical properties it is also important to distinguish between pores/defects that are ”detrimental to properties” and those that are not. This will be investigated through mechanical testing of welds containing different types of pores/defects. The effect of weld geometry with regard to mechanical properties will also be investigated. The project will focus on the titanium alloys Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo. The outcome from this work will create better possibilities for enhanced design of welded structures and also improve the possibilities for optimum selection of material combinations in terms of forging/casting/sheet for the investigated alloys. Hence, improved light weight design of components and systems and cost savings in production can be expected


Uta Klement (contact)

Professor at Materials and Manufacturing Technology, Surface and Microstructure Engineering


GKN Aerospace Sweden

Trollhättan, Sweden



Funding years 2013–2017

Related Areas of Advance and Infrastructure

Materials Science

Area of Advance

Sustainable Development

Chalmers Driving Force

More information

Project Web Page at Chalmers