The present study investigated the effect of heat treatment (pre- and post-weld) on microstructure mechanical properties an SS304L/IN718 dissimilar rotary friction welded alloy. Optical scanning electron micrographs joints in solution-treated (ST), aged (STA), post-weld (PWHT) conditions revealed defect-free welds. Furthermore, various zones were observed across weld region, namely fully deform...

In order to meet the increasing requirements of automotive industry for material strength grades and performance, application advanced highstrength steel panels, represented by dual-phase steel, in lightweight vehicle bodies is increasing. Resistance spot welding main joining process body manufacturing. How improve tensile fatigue performance resistance joints great significance structure body....

This study investigated the impact of electromagnetic stirring (EMS) on nickel-base alloy welds prepared with gas tungsten arc welding process. Alloy 52 and its variants, 52M 52MSS, were carefully evaluated their weld microstructure mechanical properties. The results showed that exhibited a typical dendrites, dendrites could be refined by stirring. Meanwhile, an application EMS, precipitates be...

Laser cladding is a well-established process to apply coatings on metals. However, on substrates considerably thinner than 1 mm it is only rarely described in the literature. In this work 200 µm thin sheets of nickel-based superalloy 718 are coated with a powder of a cobalt-based alloy, Co-28Cr-9W-1.5Si, by laser cladding. The process window is very narrow, therefore, a precisely controlled Yb ...

-s 211 WELDING JOURNAL ABSTRACT. Laser beam welding (LBW) has become common practice in the production lines of several industrial sectors including the electronics, domestic appliances, and automotive industries. The advantages of LBW over conventional fusion welding processes (mainly GMAW and GTAW) is the lower welding heat input and smaller weld pool and HAZ dimensions, which are associated ...

Shielded metal arc welding and submerged arc welding were used to prepare experimental weld metals with variations in nickel, manganese and carbon contents. The weld metals contained Ni between 6.6 and 10.5 wt. %, Mn between 0.5 and 2.0 wt. % while carbon was varied between 0.03 and 0.11 wt. %. Mechanical properties were found to be sensitive to alloying content. However once the optimum level ...

The 700 °C power plants currently under development will utilize Ni-base alloys such as alloy 617 for components to be operated at temperatures >650 °C. Due to economic reasons for components or parts of components which are subjected to temperatures <650 °C, 2% Cr or 9-12% Cr steels is used, depending on the required mechanical properties. This makes the dissimilar joining of Ni-base alloys an...

A detailed microstructural characterisation of the emerging weld-line grain structure, for bead-upon-plate welds in Ti-6Al-4V (Ti64) differing plate thickness, was performed. The microstructure studied formed during both steady state and non-steady sections within weld path, with portion being taken from end as bead heat source overhang edge plate. This allows effects welding process conditions...

Wire arc additive manufacturing (WAAM) offers a potential approach to fabricate large-scale magnesium alloy components with low cost and high efficiency, although this topic is yet to be reported in literature. In this study, WAAM is preliminarily applied to fabricate AZ31 magnesium. Fully dense AZ31 magnesium alloy components are successfully obtained. Meanwhile, to refine grains and obtain go...