Effect of flux addition on the microstructure and tensile strength of dissimilar weldments involving Inconel 718 and AISI 416

Investigations of the mechanical properties of dissimilar joint of GTD-111 superalloy and 316 stainless steel obtained by laser welding

“…It was reported that a decrease of LP led to the formation of fine precipitates within inter-dendritic areas that prevented the movement of dislocations, resulting in an improvement in the hardness and tensile strength. 16 It was also pointed out by Ramkumar et al 9 that a better combination of hardness and tensile strength can be attained by exact control of the solidification cracks and Laves particles during the laser welding of stainless steel 316 and Inconel 718 superalloy. Ahmad et al 12 stated that the weld joint exhibited a fine dendritic structure comprising Mo-rich and Nb-rich precipitates at lower LP, which was responsible for an improvement in the tensile strength and hardness.…”

“…4,5 In recent years, the pulsed laser welding of dissimilar materials has received attention in the different applications because of numerous benefits such as high productivity, high penetration, narrow weld width, low distortion, faster cooling rates, narrow heat affected zone (HAZ), little segregation of elements, and consequently improved mechanical properties. [6][7][8][9][10] Ramkumar et al 11 investigated the mechanical and metallurgical properties of the weld joint between duplex 2205 stainless steel and Inconel 625 obtained by pulsed laser welding process and observed that the joint strength reached to the tensile strength of 2205 stainless steel, which was about 820 MPa. Laser welding of duplex 2205 stainless steel and Inconel 625 was also performed by Ahmad et al 12 They observed that with the increase of welding speed and so decrease of the heat input into the weld region, the cracks reduced because of the reduction of element segregation.…”

“…The key parameters of pulsed laser welding process are pulse frequency, welding speed and laser power. 4,8,9 Recently, some authors have investigated the influence of the parameters of laser welding on the microstructure and mechanical properties of dissimilar welds. In a study on the laser pulsed welding of Inconel 718 and 4140 steel, Anuradha et al 19 found that the greater values of welding speed and laser power were associated with an enhancement of weld penetration and a decrease of the HAZ width.…”

Experimental Investigation on Effects of Carrier Solvent and Oxide Fluxes in Activated TIG Welding of Reduced Activation Ferritic/Martensitic Steel

“…al. [6] used the A-TIG welding technique for Inconel 718 joints. Manu such research on stainless steels [7][8][9][10] has been successfully carried out by various researchers which dictates the capability of this new emerging process.…”

“…It was reported that methanol and ethanol provided good spreadabilty and coverability and in turn exciting results in terms of depth of penetration. The present study deals with studying weld bead dimension such as DOP, BW, HAZ width and D/w ratio for bead-on-plate welds by A-TIG process using 6 …”