Study on the Experiment and Simulation of Titanium Alloy Bellows via Current-Assisted Forming Technology

Yang, Jianlei; Wang, Guofeng; Zhao, Tao; Li, You; Liu, Qing

doi:10.1007/s11837-018-2911-3

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…An example Ti31 titanium alloy component has been successfully formed with this method at 700 • C with a current density of 11.0 A mm −2 [81]. Figure 33 shows the formed Ti31 bellow product and the comparison of corresponding thickness distribution between experimentation and FE simulation.…”

Section: Hgpf Assisted By Current Resistance Heatingmentioning

confidence: 99%

“…If the axial feeding is insufficient, severe local thinning would occur. One the other hand, if axial feeding is excessive, wrinkling would occur [81]. The coupling effect between the axial feeding speed and forming pressure is also critical.…”

Section: Hgpf Assisted By Current Resistance Heatingmentioning

confidence: 99%

“…The coupling effect between the axial feeding speed and forming pressure is also critical. If the feeding speed is great, wrinkle may also occur as the material cannot be flattened in a timely manner by the forming pressure [81].…”

Section: Hgpf Assisted By Current Resistance Heatingmentioning

confidence: 99%

See 2 more Smart Citations

High-efficiency forming processes for complex thin-walled titanium alloys components: state-of-the-art and perspectives

Wang

Zheng

et al. 2020

Int. J. Extrem. Manuf.

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Complex thin-walled titanium alloy components play a key role in the aircraft, aerospace and marine industries, offering the advantages of reduced weight and increased thermal resistance. The geometrical complexity, dimensional accuracy and in-service properties are essential to fulfill the high-performance standards required in new transportation systems, which brings new challenges to titanium alloy forming technologies. Traditional forming processes, such as superplastic forming or hot pressing, cannot meet all demands of modern applications due to their limited properties, low productivity and high cost. This has encouraged industry and research groups to develop novel high-efficiency forming processes. Hot gas pressure forming and hot stamping-quenching technologies have been developed for the manufacture of tubular and panel components, and are believed to be the cut-edge processes guaranteeing dimensional accuracy, microstructure and mechanical properties. This article intends to provide a critical review of high-efficiency titanium alloy forming processes, concentrating on latest investigations of controlling dimensional accuracy, microstructure and properties. The advantages and limitations of individual forming process are comprehensively analyzed, through which, future research trends of high-efficiency forming are identified including trends in process integration, processing window design, full cycle and multi-objective optimization. This review aims to provide a guide for researchers and process designers on the manufacture of thin-walled titanium alloy components whilst achieving high dimensional accuracy and satisfying performance properties with high efficiency and low cost.

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Section: Hgpf Assisted By Current Resistance Heatingmentioning

confidence: 99%

Section: Hgpf Assisted By Current Resistance Heatingmentioning

confidence: 99%

See 1 more Smart Citation

High-efficiency forming processes for complex thin-walled titanium alloys components: state-of-the-art and perspectives

Wang

Zheng

et al. 2020

Int. J. Extrem. Manuf.

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show abstract

“…And the mechanical forming process normally forms the convolutions through the contact force between the tool and the tube, which decreases the surface quality of bellows. Some other forming technologies have also been used to produce metal bellows, such as rubber-pad forming, electric-assisted forming [10], viscous medium pressure forming [11], etc. It is noted that most of the prementioned forming methods cause the wall thinning since the deformation area of the tube billet is mainly under a tensile stress state, which induces a high risk of cracking during the forming process and significantly affects the subsequent service life.…”

Section: Introductionmentioning

confidence: 99%

Local Buckling-Induced Forming Method to Produce Metal Bellows

Zhang

Li²,

et al. 2023

Chin. J. Mech. Eng.

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A novel buckling-induced forming method is proposed to produce metal bellows. The tube billet is firstly treated by local heating and cooling, and the axial loading is applied on both ends of the tube, then the buckling occurs at the designated position and forms a convolution. In this paper, a forming apparatus is designed and developed to produce both discontinuous and continuous bellows of 304 stainless steel, and their characteristics are discussed respectively. Furthermore, the influences of process parameters and geometric parameters on the final convolution profile are deeply studied based on FEM analysis. The results suggest that the steel bellows fabricated by the presented buckling-induced forming method have a uniform shape and no obvious reduction of wall thickness. Meanwhile, the forming force required in the process is quite small.

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“…For some difficult-to-deform materials, the combined action of gas pressure and compressive axial load at elevated temperature were used in the forming processes [8]. Using current-assisted forming technology, Yang et al formed superior quality bellows with uniform wall thickness [9]. The control of thinning of superalloy thin-walled parts with small corner radius and complex curved shapes is more difficult, which requires greater deformation forces during the forming process.…”

Section: Introductionmentioning

confidence: 99%

Wall thickness control in multi-stage hydroforming of multiwave seal ring with small diameter

Yan

Meng

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Thinning rate is a crucial factor in forming quality of the thin-walled seal ring with complex features. To control the excessive thinning by altering the stress state during the material deformation, a new multi-stage three-dimensional (3D) hydroforming technology was proposed in this work. Based on the characteristics of the seal ring and the used superalloy strip, a multi-stage internal pressure forming process was established through finite element analysis (FEA) and forming experiment verification. In addition, the distribution of wall thickness in every stage was discussed. And the influence of the width of deformation zone and the pressure loading path in the cavity on the wall thickness of the part in each step was studied. Finally, the optimal forming parameters of each step that can achieve a stable state of metal flow were obtained. The experimental results demonstrated that the developed 3D hydroforming technology can accurately control the material flow in the multi-stage forming of the multi-wave seal ring with small-diameter and ultrathin wall thickness. For the optimized parameter combination, the blank dimensions of deformation zone are 8 mm in the first step and 18 mm in the second step, while the pre-bulging pressure is 9 ~ 12 MPa and the maximum pressure is 100 MPa in the two steps.

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Study on the Experiment and Simulation of Titanium Alloy Bellows via Current-Assisted Forming Technology

Cited by 7 publications

References 12 publications

High-efficiency forming processes for complex thin-walled titanium alloys components: state-of-the-art and perspectives

High-efficiency forming processes for complex thin-walled titanium alloys components: state-of-the-art and perspectives

Local Buckling-Induced Forming Method to Produce Metal Bellows

Wall thickness control in multi-stage hydroforming of multiwave seal ring with small diameter

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