The welding heat input has a great influence on the weldments properties. This paper describes the influence of welding heat input on the weld metal toughness of high-carbon steel surface welded joint. The steel is surfaced with self-shielded wire, with three different heat inputs (6.5; 10.5 and 16 kJ/cm). Total impact energy, as well as crack initiation and crack propagation energies, are esti...

As popular aluminum alloys, the 5xxx Al-Mg series, such as 5050 and 5052, etc., are widely used in applications such as automobile, pressure vessels, armor plate, and components for marine and cryogenic service. In this, as in all non-heat-treatable aluminum alloys, the weld metal zone is considered to be the weakest part of the joint and is the location of failure when the joint is loaded in t...

There were more intergranular precipitates and intragranular NbC in the interdendrites for heat treatment one after 615 °C/48h than that of as-weld, increased resulted emergence cracks grain boundary sample, which only worked local region during failure materials. The lattice distortion reduced from by treatment. As a result, fractography was classified as brittle transgranular fracture played ...

Fe-2.25Cr-1Mo a widely used material for headers and steam tubes of boilers. Welding of steam tube to header is required for production of boiler. Heat affected zone of the weld can have poor mechanical properties and poor corrosion behavior leading to weld failure. The cost of material used for steam tube and header of boiler should be controlled. This study propose a new materials design for ...

This paper has aimed to try and establish a successful weld joint between AISI 304L stainless steel as stud 316L plate by using an arc welding process. The effect of different current time on the torque results was experimentally studied, three-level each process parameters. post-weld heat treatment (PWHT) carried out optimum sample torque, study PWHT mechanical properties (torque hardness) mic...

A new post-weld heat treatment (PWHT) cycle was designed for novel dissimilar linear friction welding (LFW) of selective laser melted (SLM) Inconel 718 (IN718) to AD730 forged nickel-based superalloy. The microstructure and hardness the joints after PWHT are investigated compared with those as-linear welded samples. precipitation γ′ + γ″ is determined as main mechanism increase mechanical prope...

A mathematical model is developed to describe the heat transfer and fluid flow in stationary keyhole plasma arc welding. Using the volume of fluid method, the processes of heating, melting, collapsing and subsequent solidifying in the molten pool are dynamically studied. The predicted results have been compared with the experimental weld and keyhole shape. Using the LaserStrobe video system, th...