Abstract The evolution of microstructure and mechanical properties in AISI 8630 low-alloy steel subjected to inertia friction welding (IFW) have been investigated. effects three critical process parameters, viz. rotational speed, forge forces, during tubular specimens were explored. these weld joints, including tensile Charpy V-notch impact studied for determining the optimum parameters. joints...

Friction stir welding and tungsten inert gas welding techniques were employed to weld armor grade aluminum alloy to investigate the effect of welding processes on tensile behavior of weld joints. Tensile tests, Vicker microhardness tests and optical microscopy were performed on developed weld joints and base metal. Welding process influenced tensile behavior and microstructure of weld joints. F...

A new type of connection has been developed for steel-braced frame systems that allows the brace members to undergo compression buckling in in-plane direction. In addition inherent benefits (IPB) braces help reducing extent damage non-structural components, IPB system is also considered be an efficient way retrofitting existing seismically deficient structures. The use compact and thicker gusse...

In order to study the effect of spot welding parameters such as welding force, welding time and welding current intensity on nugget formation and its size in resistance spot welding process of CR3 low carbon steel sheets using ANSYS commercial software package. A 2D axisymmetric electro-thermo-mechanical finite element (FE) model is developed to simulate the nugget forming process and to predic...

Friction Stir Welding (FSW) is considered to be the most significant development in metal joining technologies to join high strength aerospace aluminum alloys. In order to improve the reliability and quality of the products manufactured by FSW process input process parameters such as tool rotational speed, welding speed and axial force are to be optimized. This study deals with the optimization...

Solidification cracking is a key phenomenon associated with defect formation during welding. To elucidate the failure mechanisms, solidification cracking during arc welding of steel are investigated in situ with high-speed, high-energy synchrotron X-ray radiography. Damage initiates at relatively low true strain of about 3.1% in the form of micro-cavities at the weld subsurface where peak volum...

Dissimilar metal welds (DMWs) are commonly used when a high strength steel is overlaid with corrosion resistant alloy (CRA) for petrochemical applications. There have been reported failures of these DMWs during subsea service while under cathodic protection (CP). These caused by local hydrogen embrittlement susceptible microstructures that form at the weld fusion boundary. Hydrogen-assisted cra...