Modelling of hot rotary draw bending for thin-walled titanium alloy tubes

Simonetto, Enrico; Venturato, Giulia; Ghiotti, Andrea; Bruschi, Stefania

doi:10.1016/j.ijmecsci.2018.09.037

Cited by 32 publications

(6 citation statements)

References 21 publications

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“…Numerical predictions of the mechanical behavior of titanium and alpha-beta titanium alloys Ti6Al4Valso known as Ti64, Ti Gr.5 or TA6Vare commonly used for the design of lightweight and high-performance components in aerospace, automotive, medical, transport industries, among others [1][2][3]. Nowadays, significant efforts have been made to accurately model part behavior until fracture, especially where structural components are concerned [4].…”

Section: Introductionmentioning

confidence: 99%

Impact of distortional hardening and the strength differential effect on the prediction of large deformation behavior of the Ti6Al4V alloy

et al. 2019

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Section: Introductionmentioning

confidence: 99%

Impact of distortional hardening and the strength differential effect on the prediction of large deformation behavior of the Ti6Al4V alloy

et al. 2019

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“…It was concluded that selecting the appropriate internal pressure and loading path was essential. Simonetto et al used hot rotary draw bending to manufacture thin-walled titanium alloy tubes [ 23 ]. Various heating strategies were investigated through the FE simulation, finding that selective heating was critical to the tube quality.…”

Section: Introductionmentioning

confidence: 99%

Analyzing Forged Quality of Thin-Walled A-286 Superalloy Tube under Multi-Stage Cold Forging Processes

et al. 2023

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Cold forging is suitable for manufacturing thin-walled tubes; however, a poorly planned forging process results in serious quality problems. This paper aims to determine an appropriate cold forging process for thin-walled A286 superalloy tube with ideal forming quality. We analyzed the effects of the two forging processes with reverse forging sequences on forming defects and hardness distribution in the thin-walled tubes via finite element simulation. The methods of optical microscope, micro-hardness, scanning electron microscope, and electron-backscattered diffraction were used to validate the tube forming quality. The simulation results revealed that the Type-I process was an appropriate forging process for meeting the quality requirements. For the Type-I process, an underfilling defect was observed at the bottom of the rod section of the tube. The stress concentration in the head section was lower than that in the Type-II process, potentially reducing the probability of crack initiation. Compared to the rod section, the head section may exhibit higher hardness magnitudes due to the greater strain distribution. The experimental results confirmed the feasibility of the Type-I process. The increased hardness in the head section may be primarily attributed to the more intense plastic deformation applied to the material in this section by the Type-I process.

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“…Titanium bent tubular components are widely used in high-end manufacturing industries, such as aircraft, aerospace, nuclear energy, etc., due to their high specific strength and excellent resistance to corrosion and fatigue [1][2][3]. With the limited formability of thin-walled titanium tubes under cold bending, a local-heat-assisted bending technology has been recently applied to achieve the bent tubular parts with a tighter bending radius and higher forming quality [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Springback Analysis for Warm Bending of Titanium Tube Based on Coupled Thermal-Mechanical Simulation

et al. 2021

Materials

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Titanium bent tubular parts attract extensive applications, thus meeting the ever-growing demands for light weight, high reliability, and long service life, etc. To improve bending limit and forming quality, local-heat-assisted bending has been developed. However, significant springback seriously reduces the dimensional accuracy of the bent tubular parts even under elevated forming temperatures, and coupled thermal-mechanical working conditions make springback behavior more complex and difficult to control in warm bending of titanium tubular materials. In this paper, using warm bending of thin-walled commercial pure titanium tube as a case, a coupled thermal-mechanical finite element model of through-process heating-bending-unloading is constructed and verified, for predicting the springback behavior in warm bending. Based on the model, the time-dependent evolutions of springback angle and residual stress distribution during thermal-mechanical unloading are studied. In addition, the influences of forming temperature and bending angle on springback angle, thickness variation, and cross-section flattening of bent tubes are clarified. This research provides a fundamental understanding of the thermal-mechanical-affected springback behavior upon local-heat-assisted bending for improving the forming accuracy of titanium bent tubular parts and structures.

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Modelling of hot rotary draw bending for thin-walled titanium alloy tubes

Cited by 32 publications

References 21 publications

Impact of distortional hardening and the strength differential effect on the prediction of large deformation behavior of the Ti6Al4V alloy

Impact of distortional hardening and the strength differential effect on the prediction of large deformation behavior of the Ti6Al4V alloy

Analyzing Forged Quality of Thin-Walled A-286 Superalloy Tube under Multi-Stage Cold Forging Processes

Springback Analysis for Warm Bending of Titanium Tube Based on Coupled Thermal-Mechanical Simulation

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