Investigation of the weldability of an aluminium–lithium alloy

Abstract

Investigations were carried out to study the effect of the chemical composition of filler material in welding an alloy of the Al–Mg–Li system on the hot crack formation resistance and the mechanical properties of welded joints. The effect of metallurgical factors on the formation of defects in the fusion zone was investigated using the spot weldability testpiece. The chemical composition of 1420 alloy was optimized and this greatly reduced the number of defects. The investigations were carried out in the framework of the research project 10.8. Technology of fusion welding of new constructional materials (‘Strategic directions of development of materials and technologies of processing these materials for the period up to 2030’) [1].

Keywords:

• Welding
• aluminium–lithium alloys
• weldability
• spot tests for weldability

Notes

Selected from Svarochnoe Proizvodstvo 2017(5) 9–18.