A STUDY OF THE SPECIFIC FEATURES OF

TRANSIENT WELDING THERMAL ELASTO-

PLASTIC STRESS-STAIN FORMATION

IN TITANIUM ALLOYS

Cao Yang  Guan Qiao  Liu Jida
Beijing Aeronautical Manufacturing Technology Research Institute

Abstract: In this paper relevant modifications have been made in the earlier developed computer programme for numerical analysis of 2-D axisymmetrical stress-strain cycles caused by GTA spot welding of thin plate. The stress-strain state during welding process in titanium alloy plates has been calculated by using of modified programme and the results of numerical analysis in titanium alloys were given in comparison with those in aluminium alloys and stainless steels as well. Based on these results the specific features of the welding thermal elasto-plastic stress-strain cycles in titanium alloys were characterized. The programme was examined by the Moire technique specially developed for assessing transient weld thermal strains. Good agreement between calculated results and experimental ones has been achieved, this shows that the computer programme could really describe the two-dimensional stress-strain cycles of thin plate during GTA spot welding process.

Open or Download Full Text of this Paper (PDF File)