Cracking during solidification is a complex phenomenon which has been investigated from various angles for decades using both experimental and theoretical methods. In this paper, cracking susceptibility was by simulation method three series of aluminum alloys: AA2xxx, AA6xxx, AA7xxx alloys. The tool developed the CALPHAD readily applicable to multicomponent alloy systems. For each alloys, susce...

The effect of boron (<0.01 to 0.03 wt%) and zirconium 0.07 on the microcracking susceptibility γ’-strengthened Ni-base superalloy IN-738LC during laser powder bed fusion (LPBF) was studied using custom designed grades. It found that both elements have a strong susceptibility, microcracks are located at high angle grain boundaries based EBSD measurements crack density increases with content elem...

Directed energy deposition and laser cladding technologies are suitable advanced manufacturing techniques for applying corrosion-resistant claddings to large carbon steel components. In this work, we clad 309L stainless wire onto substrates examine the effects of processing parameters (laser power travel speed) on metallurgical bonding microstructures. Wire dripping defects correlate excessive ...

A laser beam oscillation method using Galvano mirrors, which allows wide weld beads and controls thermal stress distribution, was suggested to suppress the formation of solidification cracks in welds. In order understand cracking behavior relation bead shape, welding performed under various widths frequency conditions. To evaluate effect parameter on susceptibility, a regression analysis based ...

During the gas tungsten arc welding of nickel based superalloys, the secondary phases such as Laves and carbides are formed in final stage of solidification. But, other phases such as 紘′′ and 絞 phases can precipitate in the microstructure, during aging at high temperatures. However, it is possible to minimize the formation of the Nb-rich Laves phases and therefore reduce the possibility of soli...