Experimental Investigation on Friction Welding of UNS S32205 Duplex Stainless Steel

Abstract

UNS S 32205 duplex stainless steel specimens were joined by continuous drive friction welding process. The experiments were conducted as per the Taguchi (L16 orthogonal array) method. The friction welding process parameters such as heating pressure, heating time, upsetting pressure, upsetting time, and speed of rotation were fixed with low, medium, and high levels of range based on the machine capacity, and the required knowledge was acquired from the preliminary experiments. The joint characterization studies included micro structural examination and evaluation of mechanical properties of the joints. Microhardness variation, impact toughness, and tensile strength of the joints were evaluated. Neither a crack nor an incomplete bonding zone was observed. The tensile strength of the joints was higher than the strength of the base material, and the friction and upsetting pressures were found to influence the joint strength. The tensile strength of all the welds was observed to be increasing with an increase in the rotational speed. The toughness of the friction welds was evaluated at room temperature and also at subzero (cryo) temperature conditions. The toughness for friction welds was found to be superior to the fusion welds of duplex stainless steel at room temperature and cryo conditions. Weldments exhibited better corrosion resistance than the parent material.

Efficiency of Dissimilar Friction Welded SAF 2205 Duplex Stainless Steel and 1045 Medium Carbon Steel Joints

“…Moreover, It has been observed that the hardness of the welding interface for all samples exhibit lower value than of the area close to it for both sides. This may be attributed to the refinement of grains occurred close to weld interface and higher amount of ferrite phase [11,13]. Beyond that, in all samples the hardness is fluctuated and then goes toward the hardness of base metals.…”

“…Tensile strength, toughness, micro hardness and corrosion behavior were evaluated, further in [9] the researchers found the effects of post weld heat treatment on 2205 DSSs weld. Ajith, et al [10][11][12][13] jointed two bars of 2205 DSSs and evaluated the mechanical properties and microstructure, optimized and performed several experiment to evaluate joint characterization, while Mercan, et al [14] optimized the welding parameters that affect increasing the fatigue strength of the joint between AISI 2205 and AISI 1020 bars. Caligulu, et al [15][16][17] welded AISI 4340-2205 steels and studied the impact of rotation speed and friction time, use the X-ray radiographic tests and found the weldability.…”

Friction Stir Processing Influence on Microstructure, Mechanical, and Corrosion Behavior of Steels: A Review

“…The corrosion resistance was further enhanced by raising the advancing speed from 50 to 150 mm/min. Ajith et al [ 54 ] investigated friction-welded UNS S32205 DSS and found that friction-welded specimens showed superior corrosion resistance than base metal in 3.5% NaCl solution. Similar research was presented on 2507 SDSS FSPed at 50 mm/min of advancing speed and 600 rpm of rotational speed by Mishra et al [ 55 ].…”

Structural response of A286 superalloy to rotary friction welding at different rotation speed

“…morphology, i.e., thickness and shape, have thought to be the main factor that affects the properties [10][11][12][13][14]. Therefore, systematical studies that focused on the mechanism of formation of different morphologies and their effects on properties have been conducted [15][16][17]. Unfortunately, no further studies have been made to investigate the internal features of the microstructures of different morphologies, which reveals the joint formation mechanism and affects the properties of large-sized rods.…”