Electron beam welding has proved phenomenal in welding of components used in space because it uses a vacuum environment which eliminates substances like oxygen, nitrogen, and hydrogen. The main advantage of EBW is its ability to weld dissimilar materials and incorporate desirable properties in the assembly. It has high depth to width ratio and focuses exactly on the portion to be welded, thereb...

Application of a localized heat source is essential in welding process, to minimize size of heat affected zone (HAZ) and hence, reduce unwanted effects such as distortion and residual stresses. Traditionally, in modeling welding phenomena there has been a focus either on the complex fluid and thermo-dynamics local to the weld pool, or on the global thermomechanical behavior of weld structure. A...

Submerged arc welding process is usually employed for welding of thick workpieces. Quality of submerged arc welded components depends on various factors. Selection of appropriate process parameters for joining metallic components is needed to obtain sound weldment. Many researchers carried out investigations to find out appropriate process conditions to obtain quality submerged arc welded compo...

The objective of this work is to study the effect of parameters on resistance spot weld of ASS316 material. In order to study the significance of the process parameters i.e. current, electrode force and weld cycles, towards the percentage improvement in material hardness. It is clear from the results that parameters significantly affect both the mean and the variation in the percentage improvem...

Modern analytics applications combine multiple functions from different libraries and frameworks to build increasingly complex workflows. Even though each function may achieve high performance in isolation, the performance of the combined workflow is often an order of magnitude below hardware limits due to extensive data movement across the functions. To address this problem, we propose Weld, a...

A novel computation method of the 3D weld pool surface from specular reflection of laser beams is presented in this paper. The mathematical model for the threedimensional surface measurement technique has been developed. Structured pattern of laser is projected on the weld pool in molten state and the reflection observed using a CCD camera. These reflected patterns can be tracked using image pr...

Observing and measuring the weld pool surface is a key to developing next-generation intelligent welding machines and to understanding the welding process better. In this paper, a dot-matrix pattern is used to project a commercially-available low power continuous laser onto the weld pool surface and the reflection of the laser is intercepted by an image plane which is placed with a distance fro...

The automatic weld seam tracking is an important challenge in None Destructive Testing (NDT) systems for welded pipe inspection. In this Study, a machine vision based seam tracker, is developed and implemented, instead of old electro-mechanical system. A novel algorithm based on the weld image centered is presented, to reduce Environment conditions and improve the seam tracking accuracy. The we...

Ti6Al4V titanium alloy is applied extensively in the aviation, aerospace, jet engine, and marine industries owing to its strength-to-weight ratio, excellent high-temperature properties and corrosion resistance. In order to extend the application range, investigations on welding characteristics of Ti6Al4V alloy using more welding methods are required. In the present study, Ti6Al4V alloy sheets w...

Accepted for Publication: March 18, 2012. Author Affiliations: Prevention Research Center, Department of Biobehavioral Health (Drs Mallett and Turrisi and Mss Comer, Read, Varvil-Weld, Favero, and Guttman), and Department of Dermatology (Dr Billingsley), Milton S. Hershey Medical Center, The Pennsylvania State University, State College; Department of Dermatology, Feinberg School of Medicine, No...