Recent development in image processing allows us to apply it in different domains. Radiography image of weld joint is one area where image processing techniques can be applied. It can be used to identify the quality of the weld joint. For this the image has to be stored and processed later in the labs. In order to optimize the use of disk space compression is required. The aim of this study is ...

Purpose – The weld joint of large thin-wall metal parts which deforms in manufacturing and clamping processes is very difficult to manufacture for its shape is different from the initial model; thus, the space normals of the part surface are uncertain. Design/methodology/approach – In this paper, an effective method is presented to calculate cutter location points and to estimate the space norm...

The welding use correct process parameters will produce joint with optimum in mechanical properties. current is a very important parameter welding. Gas Tungsten Arc Welding carbon steel A53 Gr B uses variations can be an option to get the best quality joints. purpose of this research properties and microstructure by varying current. experimental method GTAW A 53 using single V butt 5G position,...

This study investigates an analytical beam model to improve the analyses of welded thin plates with welding-induced curved distortions. The addresses rigidity a butt-welded joint and its effect on plate bending structural stress by including rotational spring at end. stiffness, ka, is replaced fixity factor, ?a. validity based assumption small displacement moderate rotation mid-plane plate. Usi...

The objective of this research is to develop an experimental-theoretical analysis about the influence of the cooling medium and the geometry of the welding bead profile in fatigue life and the associated parameters with structural integrity of welded joints. A welded joint with cruciform geometry is considered using SMAW (Shielded Metal ArcWelding), plates in structural steel ASTM A36 HR of 8 m...

Two different cases regarding the zinc coating at the lap joint faying surface are selected for studying the influence of zinc vapor on the keyhole dynamics of the weld pool and the final welding quality. One case has the zinc coating fully removed at the faying surface; while the other case retains the zinc coating on the faying surface. It is found that removal of the zinc coating at the fayi...

IHI Southwest Technologies (ISwT) provided Reactor Coolant System, Hot and Cold Leg Nozzle examinations in accordance with MRP-139, “Materials Reliability Program: Primary System Piping Butt Weld Inspection and Evaluation Guideline,” at the Robinson Nuclear Plant. During this outage volumetric inspections were performed using ultrasonic examination techniques qualified to meet the requirements ...

A three-dimensional (3D) finite element (FE) model is applied to predict the temperature evolution in the laser welding of galvanized high-strength steels in a zero-gap lap joint configuration. A rotary Gaussian volumetric heat source model is introduced to simulate the laser energy input. The temperature data measured by thermocouples are used to verify the boundary conditions of the thermal m...