The paper presents results of the investigation of structure relaxation and thermal properties of PE-80 and PE-100 polyethylene hot-tool butt welds. It was found that a weld with the re-crystallized crystalline structure is formed during the welding of dissimilar types of polyethylene. It is shown that within a long period (1 year) the relaxation occurs not only in amorphous but also in the cry...

In the present study, the Weldability and microstructure of dissimilar welds of AISI 347austenitic stainless steel to ASTM A335 low alloy steel was investigated. For this purpose, gas tungsten arc welding process and two filler metals including ERNICr-3 and ER309L were used. After welding, the microstructure of the different zones of each joint, including weld metals, heat affected zone (HAZ) 1...

 provision of large, stress-bearing area  excellent fatigue strength  good shock absorption  reduced galvanic corrosion  no need to have access to far-side of adherend to make joint  bonding is possible on dissimilar materials  provision of smooth contours and sections around joint areas  sealing  improved damping which increases structural stiffness  reduction in distortion and metal...

The demand for joining dissimilar metals has exponentially increased due to the global concerns about climate change, especially electric vehicles in automotive industry. Ultrasonic welding (USW) surges as a very promising technique join metals, providing strength and conductivity, addition avoid metallurgical defects, such formation of intermetallic compounds, brittle phases porosities. Howeve...