Abstract In this paper, the effect of ultrasonic peening surface treatment on mechanical properties TIG butt weld joints low-carbon steel (AISI 1020) was studied. A single V-angle ( 45 °) made sheets metal used then welded at constant parameters, namely: current, voltage. Wire filler ER70S-3 with argon to obtain many welding joints. Some them were subjected one, two and three passes. The micro-...

Flash butt welding is a resistance process that offers great advantages due to its high thermal efficiency, simplicity and speed, makes it ideal for mooring chains. Despite advantages, numerous corrosion problems are still being found in practice, both the heat-affected zone weld line. Literature scarce about it, limiting mostly state problem. The majority of studies attribute this preferential...

Welded mild steel is used in different applications engineering. To strengthen the joint, weld can be reinforced by adding titanium alloy powder to joint. This results formation of incomplete martensite a welded The affects mechanical properties. Therefore, this study aims predict volume fraction butt joints understand complex phenomena during microstructure formation. do so, combination finite...

Metal nanolaminate coatings are introduced as a new approach in post-weld treatment methods. A Cu/Ni coating is electrodeposited from single citrate bath onto butt-welded tension-tension fatigue specimen. The consists of Ni base layer and 160 alternating Cu layers. specimen tested with stress range close to the yield strength This first study reveals surprisingly high lifetime extensions welded...

This study investigates four different joints under fluctuating tension cycles in the low-cycle fatigue (LCF) regime. The selected material was S960 ultra-high-strength steel, manufactured via direct-quenching manufacturing route. Based on typical engineering solutions, following were chosen to be investigated experimental tests: metal active gas and laser welded butt joints, fillet-welded load...

A novel approach for predicting the intermetallic compound (IMC) formation during friction stir welding (FSW) of AA6061 to commercially pure copper has been developed, in addition their effect on mechanical properties. The temperature distribution aluminium weld nugget determined by a finite element model, use an Al–Cu phase diagram and elemental concentration have combined predict validate sev...

Underwater wet welding is one of the most common repair measures for corroded offshore steel structures. Few studies have been carried out systematically concerned with mechanical properties of such welds, thus current design provisions rely heavily on limited experimental data on welds made underwater and design properties for corresponding welds made in air. This paper presents a series of ex...

In this paper we compare the performance of planning algorithms distinguishing and iterating between observation (diagnosis) and repair (action) phases with algorithms extending conventional planning methods with observations using n-step look ahead. Diagnosis and repair iteration planning algorithms are an extension of earlier work of Friedrich and Nejdl, n-step look ahead planning including d...

In this work, dissimilar butt joints of 6061 aluminum and 304 stainless steel were prepared by friction stir welding (FSW), the FSW process is monitored infrared (IR) thermography. Considering different material properties between steel, a novel CFD model with weld tool developed tested to investigate effects on aluminum-steel joint under traverse speeds. The calculated temperature thermal cycl...

In this study, the liquation cracking susceptibility in heat-affected zone of CM247LC superalloy gas turbine blades during repair welding was quantitatively evaluated using a newly developed pre-weld Varestraint test method. The geometry replicated through tests for bead. susceptibility, that is, temperature range (LCTR), could be visualization at time crack formation test. LCTR alloy welds (he...