Experimental tests were carried out to assess the fatigue strength of four types welded joints, made AH36 steel and used for ship structures. The joints differ presence weld defects thickness value. Fatigue applying axial cyclic loads at a frequency 20 Hz stress ratio R = 0.5. temperature e increment specimen surface was detected during load application by means an infrared camera. analysis the...

Joining of aluminum alloy AA6061 to mild steel was achieved using a friction stir extrusion (FSE) method in which processed extruded into preformed dovetail groove. These joints were subject various in-process cooling (IPC) methods via compressed air, water, granulated dry ice, and liquid nitrogen as well varying weld pitches (WP) the following rotational translational (inches per minute, IPM) ...

Thin AZ31 magnesium alloy sheets, i.e., 2 mm thick, are welded by Friction Stir Welding (FSW) in butt joint configuration using gap width up to 1.15 mm. All welds present good surface finishing and no internal defects, except for the weld produced maximum width. A reduction of thickness within Zone is seen with increase width, leading a 8.5%. Microstructure Vickers hardness investigations revea...

Repair welding is not used enough in the industry 1 . One of the reasons for this lies in the insufficient and unrealiable knowledge in many segments of this area. A very important part is having appropriate knowledge of metallurgical processes in heating of the base material 2-4 . Unsuitable heating deteriorates the microstructure as it reduces toughness and fracture behaviour of the weld 5 . ...

Fatigue behavior of welded joints is significantly influenced by numerous factors, for example, local weld geometry. A representative quantity the influence notch effect created geometry stress concentration factor (SCF). Thus, SCFs are often used to estimate fatigue failure locations and strength; however, this simplifies mutual other influencing factors. Consequently, strength estimates may d...