The effects of droplets filling the molten pools during double-sided laser beam welding (DSLBW) T-joints was established. dynamic behavior keyhole and pool under different droplet modes were analyzed. results indicated that compared with contact transition, stability metal flow on wall reduced by free transition slight transition. At later stage entering via maximum velocity 5.33 m/s, 4.57 2.99...

This study investigates the influence of resistive pre-heating feedstock wire (here called hot-wire) on stability laser-directed energy deposition Duplex stainless steel. Data acquired online during depositions as well metallographic investigations revealed process characteristic and its window. The data, such electrical signals in circuit images captured from side-view interaction zone gave in...

Mathematical modelling of welding phenomena is very complex: involving melt pool phenomena, solidification, weldability analysis, microstructure evolution in the heat affected zone, welding heat-flow simulation, electrical-thermal-mechanical simulation etc. Some interactions between these processes are included in Fig. 1. Each topic alone can be intellectually challenging and too hard to be inv...

Current estimates and glass formulation efforts are conservative vis-à-vis achievable waste loadings. These formulations have been specified to ensure that glasses are homogenous, contain essentially no crystalline phases, are processable in jouleheated, ceramic-lined melters and meet WTP Contract terms. The WTP’s overall mission will require the immobilization of tank waste compositions that a...

This paper describes a numerical study of the g-jitter driven double diffusive convective flows, thermal and concentration distributions in binary alloy melt systems subject to an external magnetic field. The study is based on the finite element solution of transient magnetohydrodynamic equations governing the momentum, thermal and solutal transport in the melt pool. Numerical simulations are c...

The element transfer of Ti from molten flux to the weld metal is limited less than 310 ppm in submerged arc welding carbon steel. This limitation due high oxygen partial pressure prevailing at flux-weld pool interface. Our previous study illustrated that use Al powder combination with improves 4% Ti, whilst maintaining 509 O metal. should be controlled 200 500 maintain toughness. In this study,...

The article describes an advanced test stand for measuring temperatures during the 3D printing additive manufacturing. Based on mathematical procedures, it analyzes impact energy of laser beam used in metal printing.