Characterization of microstructure, toughness, and chemical composition of friction-welded joints of UNS S32205 duplex stainless steel

Abstract

Friction welding is a solid-state joining process which is applied extensively because of its advantages such as low heat input, efficient application, ease in manufacturing, and environmental friendliness. The present study investigates the mechanical and metallurgical properties of UNS S32205 duplex stainless steel frictionwelded joints. The process parameters, namely friction pressure, upsetting pressure, and rotational speed are individually varied from low level to high level (within the range of the machine setup) and their effects on the joint properties are analyzed. The partial-deformation zone had higher hardness than the weld and base metal. The toughness of the joints was evaluated at room temperature and at subzero temperature conditions. The impact toughness of the friction-welded joints was found to be superior to fusion-joined duplex stainless steel in room and cryogenic conditions.

Fiber Laser Welding of Dissimilar 2205/304 Stainless Steel Plates

“…Commencing the WRC-1992 diagram [68], it is expected that the weld microstructures would enclose a combination of austenite and ferrite, containing approximately 11-18% of ferrite. The Cr eq value was equivalent to 19 and the Ni eq value was close to 11, giving a Cr eq /Ni eq ratio of 1.73 and that means the solidification process led to ferritic formation, as previously reported [69,70]. Type A (fully austenite) or AF (austenite to ferrite) principally refers to austenite solidification, which results in diverse austenite and ferrite morphologies.…”

Effects of Heat Input on Microstructure, Corrosion and Mechanical Characteristics of Welded Austenitic and Duplex Stainless Steels: A Review

“…Generally, the formation of secondary phases influences the corrosion resistance and mechanical properties [73]. The absence of these phases is a result of the rapid cooling in the weld zone and prompt growth and nucleation compared with the fusion process [74]. The temperature-time precipitation curves for various phases observed in a 2205 type alloy are shown in Figure 5.…”

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

“…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.…”