A review on superplastic forming of Ti-6Al-4V and other titanium alloys

Akula, Sai Pratyush; Ojha, Mihir; Rao, Kolla Lakshman; Gupta, Amit Kumar

doi:10.1016/j.mtcomm.2023.105343

Cited by 14 publications

(7 citation statements)

References 89 publications

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“…These images were captured under bright field conditions, where only the transmitted beam was selected. This technique is widely recognized for defect analysis in a range of materials, including aluminum alloys [20], titanium alloys [21] and various nanomaterials [22]. It is important to note that all TEM images were deliberately taken in the direction to ensure the precise observation of the smallest defects [23].…”

Section: Materials and Experimentsmentioning

confidence: 99%

TEM preparation technique influence on an LBM AlSi7Mg0.6 alloy nanostructure

Bello,

Jullien,

Galy

et al. 2023

MRS Communications

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To provide detailed characteristics on the laser beam melting AlSi7Mg0.6 alloy, transmission electron microscopy is required as the microstructure is composed of aluminum cells hardened by nano-sized precipitates encapsulated in a 3D silicon structure. However, sample preparation techniques can cause local temperature variation or irradiation that impact the local microstructure. With various thin-foil preparations, we have shown that standard twin jet electropolishing produce thin, well-defined aluminum cells filled with nano-sized precipitates. When ion-based methods are used, due to local heating and irradiation, the nanoprecipitates are significantly altered. Lowering the preparation technique temperature appears to be equivalent to twin jet electropolishing.

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Section: Materials and Experimentsmentioning

confidence: 99%

TEM preparation technique influence on an LBM AlSi7Mg0.6 alloy nanostructure

Bello,

Jullien,

Galy

et al. 2023

MRS Communications

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“…Owing to the poor plasticity and high springback of titanium alloy at room temperature [ 5 ], the forming of titanium alloy sheets is typically conducted at high temperatures. Common conventional hot forming processes for titanium alloy include isothermal hot pressing [ 6 ], superplastic forming [ 7 ], hot stretch forming [ 8 ], and so on. But these processes require the sheet to maintain a high and constant temperature during deformation, which means that the forming tool needs to be heated, which increases the manufacturing cost and reduces productivity.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation and Microstructural Evolution Investigation in Hot Stamping Process of Ti6Al4V Alloy Sheets

Qu,

Gu,

et al. 2024

Materials

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Titanium alloy hot stamping technology has a wide range of application prospects in the field of titanium alloy part processing due to its high production efficiency and low manufacturing cost. However, the challenges of forming titanium alloy parts with large depths and deformations have restricted its development. In this study, the hot stamping process of a Ti6Al4V alloy box-shaped part was investigated using ABAQUS 2020 software. The thermodynamic properties of a Ti6Al4V alloy sheet were explored at different temperatures (400 °C, 500 °C, 600 °C, 700 °C, 800 °C) and different strain rates (0.1 s−1, 0.05 s−1, 0.01 s−1). In addition, the influence law of hot stamping process parameters on the minimum thickness of the formed part was revealed through the analysis of response surface methodology (RSM), ultimately obtaining the optimal combination of process parameters for Ti6Al4V alloy hot stamping. The experimental results of the hot stamping process exhibited a favorable correlation with the simulated outcomes, confirming the accuracy of the numerical simulation. The study on the microstructure evolution of the formed parts showed that grain refinement strengthening occurred in the part with large deformation, and the formed box-shaped parts exhibited a uniform and fine microstructure overall, demonstrating high forming quality. The achievements of the work provide important guidance for the fabrication of titanium alloy parts with large depths and deformations used in heavy industrial production.

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“…Superplastic forming/diffusion bonding (SPF/DB) process can be used to fabricate engine blades with cavity structure. This process is to coat the spacer between the two blanks of the blade, combine them by DB, obtain the cavity structure of the blade by SPF and then obtain the expected shape by hot forming (Akula et al, 2023). Hollow blades with complex surfaces can be manufactured by SPF/DB process (Wang et al, 2022a), but the process is complex and difficult to control and the hollow structure and shape cannot achieve good manufacturing accuracy.…”

Section: Introduction 11 Backgroundmentioning

confidence: 99%

The robot grinding and polishing of additive aviation titanium alloy blades: a review

Xiao,

Zhang,

et al. 2024

JIMSE

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PurposeThe purpose of this review is to comprehensively consider the material properties and processing of additive titanium alloy and provide a new perspective for the robotic grinding and polishing of additive titanium alloy blades to ensure the surface integrity and machining accuracy of the blades.Design/methodology/approachAt present, robot grinding and polishing are mainstream processing methods in blade automatic processing. This review systematically summarizes the processing characteristics and processing methods of additive manufacturing (AM) titanium alloy blades. On the one hand, the unique manufacturing process and thermal effect of AM have created the unique processing characteristics of additive titanium alloy blades. On the other hand, the robot grinding and polishing process needs to incorporate the material removal model into the traditional processing flow according to the processing characteristics of the additive titanium alloy.FindingsRobot belt grinding can solve the processing problem of additive titanium alloy blades. The complex surface of the blade generates a robot grinding trajectory through trajectory planning. The trajectory planning of the robot profoundly affects the machining accuracy and surface quality of the blade. Subsequent research is needed to solve the problems of high machining accuracy of blade profiles, complex surface material removal models and uneven distribution of blade machining allowance. In the process parameters of the robot, the grinding parameters, trajectory planning and error compensation affect the surface quality of the blade through the material removal method, grinding force and grinding temperature. The machining accuracy of the blade surface is affected by robot vibration and stiffness.Originality/valueThis review systematically summarizes the processing characteristics and processing methods of aviation titanium alloy blades manufactured by AM. Combined with the material properties of additive titanium alloy, it provides a new idea for robot grinding and polishing of aviation titanium alloy blades manufactured by AM.

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A review on superplastic forming of Ti-6Al-4V and other titanium alloys

Cited by 14 publications

References 89 publications

TEM preparation technique influence on an LBM AlSi7Mg0.6 alloy nanostructure

TEM preparation technique influence on an LBM AlSi7Mg0.6 alloy nanostructure

Finite Element Simulation and Microstructural Evolution Investigation in Hot Stamping Process of Ti6Al4V Alloy Sheets

The robot grinding and polishing of additive aviation titanium alloy blades: a review

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