Possibilities For Improvement Of Fatigue Strength Of Butt Welded Joints Of High Strength Struc.steel

Author:  Wohlfahrt, H. and Heeschen, J.
Source:  Fatigue of Engrg.Mater.and Struc.Vol.II,Sept.'86
Doc ID:  1986055
Year of Publication:  1986
Abstract:  
The paper shows that TIG welded or pulsed arc TIG welded joints of high strength steels have the same fatigue strength as manual arc welded and TIG dressed joints. In practice TIG welding of cover and cap passes over underlying MAG welded passes can replace and more time consuming TIG dressing of all weld toes of a totally MAG welded joint. After TIG welding respectively pulsed arc TIG welding and subsequent shot peening the fatigue strength under completely reversed bending surpasses the fatigue strength of the unpeened high strength base material. Descriptors: Carbon steels-- Welding; High strength low alloy steels-- Welding; Gas tungsten arc welding; Butt welds-- Mechanical properties; Fatigue strength-- Deformation effects; Shot peening