X70 pipeline steel is butt welded by fully automatic welding at 25° slope, and the characteristic information of process collected. A 3D transient heat mass transfer model weld pool established. This was verified means shape two-dimensional weld, then, flow field under steep slope conditions simulated to clarify mechanism lack fusion defect. The results show that arc deflected when it stays on ...

The application of press hardening steels is spreading from automobiles, where crashworthiness demands are critical, to other segments, such as the agricultural and road transport industries. However, operational conditions which equipment exposed requires heavier sheet gages adapted joining processes. In this context, fatigue recognized critical failure mode. present article describes procedur...

Butt-welded joints are common in many industries. The fatigue behavior of such depends on numerous factors, e.g. load level, local weld geometry, or parent material strength. To make things worse, these factors often interact, yet mutual influence can hardly be quantified by multivariate studies, i.e. varying one factor at a time out due to the large number required tests and statistical nature...

background : denture fracture is an unresolved problem in complete denture prosthodontics. however, the repaired denture often experiences a refracture at the repaired site due to poor transverse strength. hence, this study was conducted to evaluate the effect of joint surface contoursand glass fiber reinforcement on the transverse strength of repaired acrylic resins. materials and methods: a t...

Numerous industrial applications, particularly those in the transport industry, require joining of dissimilar materials which offers considerable benefits terms low cost, design flexibility, and weight reduction for overall structures. The problems associated with conventional fusion welding processes have stimulated researchers recent years to develop new methods are difficult join. Friction s...

Abstract The joining of plastics is required because component geometries are severely restricted in conventional manufacturing processes such as injection molding or extrusion. In addition to established hot plate welding, infrared vibration gas butt welding becoming more and important industrially due its advantages. main benefits the contactless heating process, suitability for glass fiber r...

Water-wall tubes are important components in power plants and used to absorb the heat from boilers, they often fail prematurely due corrosion, erosion, fatigue during service. To repair defects, weld overlay is adopted by forming a compressive stress area around susceptible prevent cracks propagating. In order obtain reasonable process parameters of repair, study combining experiments numerical...