Influence of the rotary friction welding parameters on the microhardness and joint strength of Ti6Al4V alloys

Nu, Ho Thi My; Loc, Nguyen Huu; Minh, Luu Phuong

doi:10.1177/0954405420972549

Cited by 21 publications

(13 citation statements)

References 13 publications

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“…In Grade 5 -Titanium alloy RFW, sun et al [51] also observed high hardness (390 HV) in the weld center because of the refined grain structure of transformed β than the base region (330 HV) which is composed of elongated α with β along grain boundaries. Similar observations were communicated by Nu et al [26]. Hardness is high in the C1 weld region when compared to the C0 weld region, this is due to very fine acicular alpha and beta phases.…”

Section: Hardness Studiessupporting

confidence: 89%

“…Typically, in friction welded samples weld joint forms in the shape of sand timer glass [25], in our samples also in the same way this formation can be seen. In RFW, a narrow weld joint at the centre is mainly because of high heat generation at the centre of the joint than its periphery, because of this reason the weld joint is formed as an hourglass shape [26]. There were no defects in and around the weld region.…”

Section: Microstructure Studiesmentioning

confidence: 99%

“…Pederson et al [15] studied mechanical and microstructural changes in Grade 5 -Titanium alloy FRW welds after Post Weld Heat Treatment (PWHT), low-temperature PWHT showed a significant increase in hardness in Grade 5 -Titanium alloy owing to the refinement in deformed Zone. Recent studies on rotary Friction welding (RFW) of Grade 5 -Titanium alloy by Nu et al [16,17] has shown axial pressure to be the most influential factor for high tensile strength and hardness. Many researchers have reported the effect of heat treatments on mechanical properties of Grade 5 -Titanium alloy fusion welds [18][19][20], some on LFW of Grade 5 -Titanium alloy [21] and FSW [22].…”

Section: Introductionmentioning

confidence: 99%

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Influence of heat treatments on microstructural and mechanical properties of Grade 5 titanium friction welds

Vikas¹,

Rao²,

Rahul³

et al. 2022

Eng. Res. Express

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Titanium and its alloys are extensively used in automobile, aerospace and biomedical applications. There are many problems associated with the fusion welding of titanium. Thus, friction welding is an alternative technique for joining titanium without defects. In this study, Ti-6Al-4V (Grade 5 -Titanium alloy) rods were welded using a rotary friction process. Before welding, pre-heat treatments were carried in α-β and β conditions followed by stress relieving on Grade 5 -Titanium alloy rods and some rods were stress relieved after welding. After several trials, friction welding at rotational speed, 1500 rpm and 5kN upset force obtained defect-free joints. α-β heat treatment enhanced ductility as compared with β heat treatment. α-β heat treatment lead formation of bimodal microstructure in the base metal and β heat treatment produced lamellar Coarse β grains with colonies of α within β grains. Among different heat treatment conditions, high hardness was observed in the α-β heat treatment condition with stress-relieving. Stress-relieving of the welds resulted in an improvement in the hardness because of β precipitates. Fracture morphology is brittle in β treated conditions and ductile in α-β conditions. All welded samples failed away from the weld region irrespective of heat treatments applied, this shows that the weld region is much stronger than the base region due to acicular α and β phases. Mechanical properties were correlated as evidenced by microstructural features.

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Section: Hardness Studiessupporting

confidence: 89%

Section: Microstructure Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of heat treatments on microstructural and mechanical properties of Grade 5 titanium friction welds

Vikas¹,

Rao²,

Rahul³

et al. 2022

Eng. Res. Express

View full text Add to dashboard Cite

show abstract

“…Moreover, because the material is not melted in this process, in contrast to fusion welding methods, inertia friction welding can avoid defects such as lack of penetration, poor fusion, and solidification cracks [ 24 , 25 ]. The other advantages are a narrow heat-affected zone (HAZ) [ 26 ], local heating [ 27 ], and a short operating time [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Solid-State Rotary Friction Welded Inconel 713C and 32CrMo4 Steel Joints Used in a Turbocharger Rotor

2023

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The aim of this work was to determine the effect of selected parameters of friction welding, such as friction pressure and welding speed, on the mechanical properties and microstructure of friction-welded Inconel 713C-32CrMo4 joints. Tensile strength and hardness tests were carried out to determine the mechanical properties of the resulting welded joints. The results of the ultimate tensile strength, hardness, and microstructure were linked to the parameters of the welding process. It was found that the highest tensile strength was 1222 N/mm2. There was a significant increase in the hardness value in the thermo-mechanically affected zone for all samples. However, as the friction pressure increased, the zone with the higher hardness value migrated towards the 32CrMo4 material. In all weld tests, the fracture was found on the 32CrMo4 steel side. A distinct band of carbide formation was observed between the thermo-mechanically affected zone and the Inconel 713C base material.

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“…8 When traditional fusion welding is used, it is easy to form a brittle reaction layer at the interface, resulting in a decrease in the strength of the joint. 9,10 So far, several methods of welding aluminum alloys have been studied, such as explosion welding, friction stir welding, and MPW. However, friction stir welding is only applicable to the plate welding, and the welding efficiency is very low.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation and optimization on field shaper structure parameters in magnetic pulse welding

Chen

Yang

Peng

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part B:

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Magnetic pulse welding is a high-speed welding technology, which is suitable for welding light metal materials. In the magnetic pulse welding system, the field shaper can increase the service life of the coil and contribute to concentrating the magnetic field in the welding area. Therefore, optimizing the structure of the field shaper can effectively improve the efficiency of the system. This paper analyzed the influence of cross-sectional shape and inner angle of the field shaper on the ability of concentrating magnetic field via COMSOL software. The structural strength of various field shapers was also analyzed in ABAQUS. Simulation results show that the inner edge of the field shaper directly affects the deformation and welding effect of the tube. So, a new shape of field shaper was proposed and the experimental results prove that the new field shaper has better performance than the conventional field shaper.

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Influence of the rotary friction welding parameters on the microhardness and joint strength of Ti6Al4V alloys

Cited by 21 publications

References 13 publications

Influence of heat treatments on microstructural and mechanical properties of Grade 5 titanium friction welds

Influence of heat treatments on microstructural and mechanical properties of Grade 5 titanium friction welds

Microstructure and Mechanical Properties of Solid-State Rotary Friction Welded Inconel 713C and 32CrMo4 Steel Joints Used in a Turbocharger Rotor

Experimental investigation and optimization on field shaper structure parameters in magnetic pulse welding

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