Effect of forging pressure on microstructural characteristics and tensile properties of linear friction welded Ti-6Al-4V alloy joints

Mukundhan, C.; Sivaraj, P.; Petley, Vijay; Verma, Shweta; Balasubramanian, V.

doi:10.1016/j.matpr.2020.03.485

Cited by 5 publications

(3 citation statements)

References 11 publications

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“…Its excellent performance under an intensive test environment leads to the utilization of this alloy in many industries like aerospace, energy, military, and medical industries. More particularly, the blisk assembly of the turbine, propellant tank rings, the dome of launch vehicles, and satellites made with Ti-6Al-4V alloy because of its high strength-to-weight ratio, weldability, resistance to corrosion, and compatibility with near-net-shape machining [1,2]. Still, there are hindrances in Ti-6Al-4V alloy usage in many specific applications as they require some essential factors like strength and % of elongation to a significant level.…”

Section: Introductionmentioning

confidence: 99%

Effect of thermal cycling on mechanical and microstructural properties of heat-treated Ti-6Al-4V alloy

Teja

Manikandan

Ayyagari³

2022

Mater. Res. Express

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Titanium (Ti-6Al-4V) is an α+β phase-field alloy utilized in many industries due to its high strength-to-weight ratio and near-net shaping capability. Solution treated & aging, and stress relief annealing processes were performed on the samples to increase the strength and % of elongation. The heat-treated samples then thermally cycled for 500 cycles, 1000 cycles, and 1500 cycles to evaluate the microhardness and tensile properties. The presence of martensite and α2 precipitates in the thermally cycled samples was confirmed by scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). In this investigation, at 1000 thermal cycles, all specimens show improvement in both hardness and strength when compared within the cycles. Solution-treated and aging (STA), stress relief annealing (SRA), and without any heat-treatment (WHT) processes have their highest hardness values recorded for 1000 thermal cycles, and the values are 471 HV0.5, 381 HV0.5, and 374.6HV0.5, respectively. For the SRA process, ultimate tensile strength (UTS) of 925 MPa and yield strength (YS) of 896 MPa have resulted in 1000 cycles. Similarly, at 1000 thermal cycle WHT processed samples yielded UTS of 920 MPa and YS of 885 MPa. STA process samples that are heat-treated for 1000 thermal cycles have better strength properties than SRA and WHT and had a UTS of 1530MPa and YS of 1420MPa. From a ductility point of view, a maximum elongation of 29% for the STA process has resulted. Compared to forged titanium alloy (base metal), an increase of 31% elongation and 41% ultimate tensile strength for solution treated and aging process at 1000 cycles has resulted in this investigation.

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Section: Introductionmentioning

confidence: 99%

Effect of thermal cycling on mechanical and microstructural properties of heat-treated Ti-6Al-4V alloy

Teja

Manikandan

Ayyagari³

2022

Mater. Res. Express

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“…But good tensile property with the superior elongation was resulted regardless of the processing parameters since there is no softening region in the obtained joints. Mukundhan et al [23] studied the effect of forging pressure on microstructure and tensile properties of Friction Welded Ti64 joints. The study reveals that wider interface is observed for lower forging pressure and decrease with raise in forging pressure.…”

Section: Introductionmentioning

confidence: 99%

Investigation of friction welding parameters of AISI 304L/Ti-6AL-4V joints

Kumar

Babu

Saleh

et al. 2022

Mater. Res. Express

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The present paper focuses on evaluating the bonding strength interfaces between the contact materials such as AISI 304L and Ti-6Al-4V via friction welding (FW). Experimental tests are performed by considering the process parameters such as friction time, rotational speed and friction pressure, mechanical properties were evaluated. The rotational speed of 1800, 1600, 2100, 2300 and 2500 rpm were considered in the study. The response surface methodology (RSM) is used to predict the outcomes of the work. Experimental tests were revealed that the friction pressure of 160 MPa, 7 sec of friction time and speed of 2300rpm are the optimal parameters based on the joint strength. Also, observed that the aluminum interlayer thickness of 1.25 µm on the Ti-6Al-4V side and 1.38 µm on the AISI 304L side. The tensile strength of 143.39 MPa was noticed at the interface area. The RSM response generates the curved potential line frequency range with 6.5% elongations. Results confirm that, the response surface methodology outcomes and experimental values were in close agreement.

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“…Similar behaviour is observed for friction pressure and amplitude. Mukundhan et al [36] reported that tensile strength increases with an increase in forging pressure up to 10 MPa. Furthermore, an increase in forging pressure reduces the strength of joints.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Features, Tensile Properties, and Impact Toughness of Linear Friction Welded High-Temperature Alloy Joints for Blisk Assembly Applications

Mukundhan

Sivaraj

Balasubramanian

et al. 2022

Advances in Materials Science and Engineering

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The main objective of this investigation is to analyze the microstructure, tensile properties, and impact toughness of Ti6Al4V alloy joints developed using optimized parameters of linear friction welding (LFW) for gas turbine blisk assembly applications. The 6 mm thick plates of Ti6Al4V alloy were joined using a friction time of 40 sec, a friction pressure of 20 MPa, a forging pressure of 10 MPa, a forging time of 3 sec, and an oscillating frequency of 14 Hz. The different regions of joints were analyzed using a stereo zoom microscope. Optical and scanning electron microscope (SEM) was used for analysing the microstructural features of joints. The room temperature tensile properties, hardness, and impact toughness of LFW-Ti6Al4V alloy joints were evaluated and correlated to the microstructural features of weld region. The fractured sections of tensile and impact toughness specimens of joints were analyzed using SEM and the failure of joints was correlated with the hardness survey. Results showed that the LFW-Ti6Al4V alloy joints developed using the optimized parameters exhibited a tensile strength (TS) of 1015 MPa, a yield strength (YS) of 940 MPa, and an elongation (EL) of 8%. The joints revealed 98.54%, 95.91%, and 66.67% of tensile strength, yield strength, and ductility of the parent metal. The LFW joints disclosed impact toughness (IT) of 17.2 J which is 89.77% impact toughness of the parent metal. The superior tensile properties and impact toughness of LFW-Ti6Al4V alloy joints are mainly attributed to a greater degree of refinement of α + β grains in the weld interface, which offers greater resistance to tensile deformation and crack propagation.

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Effect of forging pressure on microstructural characteristics and tensile properties of linear friction welded Ti-6Al-4V alloy joints

Cited by 5 publications

References 11 publications

Effect of thermal cycling on mechanical and microstructural properties of heat-treated Ti-6Al-4V alloy

Effect of thermal cycling on mechanical and microstructural properties of heat-treated Ti-6Al-4V alloy

Investigation of friction welding parameters of AISI 304L/Ti-6AL-4V joints

Microstructural Features, Tensile Properties, and Impact Toughness of Linear Friction Welded High-Temperature Alloy Joints for Blisk Assembly Applications

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