Optimization of Forging Process Parameters and Prediction Model of Residual Stress of Ti‐6Al‐4V Alloy

Fang, Xiurong; Liu, Liu; Lü, Jianyun; Gao, Yang

doi:10.1155/2021/3105470

Cited by 6 publications

(5 citation statements)

References 23 publications

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“…Te microstructure of hot hammer forged Ti-6Al-4V at diferent forging temperatures has been studied by author Fang in the previous work. It was found that the morphology and volume fraction of α and β phases were signifcantly afected by the forging temperature of hot hammer forging process [2]. As shown in Figures 4-6, when the forging temperature is above the β phase transition temperature to 1000 °C, the equiaxed α phase disperses into the α + β substrate and the volume fraction of α phase increases.…”

Section: Resultsmentioning

confidence: 94%

“…Ti-6Al-4V alloy is used as a structural material for turbine blades because of its high strength, corrosion resistance, and excellent high-temperature properties [1,2]. Te creep behaviour of titanium alloys is critical to blade's service life and the turbine's safety and credibility in high-temperature and pressure service environments [3].…”

Section: Introductionmentioning

confidence: 99%

“…Te forging plastic forming process, a common production method for Ti-6Al-4V alloy blades, is applicable to enhance the mechanical properties and can substantially eliminate internal faws [10]. And compared with hydraulic press forging, the comprehensive mechanical properties of Ti-6Al-4V alloy forged by hot hammer forging are more excellent due to the high deformation rate that leads to the formation of fner grains [2,11,12]. Lou et al [13][14][15] showed that the variation of forging parameters during hot hammer forging could signifcantly afect the phase transformation process of Ti-6Al-4V alloy, in which the variation of forging temperature has a more signifcant efect on the phase transformation, dislocation motion, and grain boundary slip state during the forging deformation of titanium alloy.…”

Section: Introductionmentioning

confidence: 99%

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Forging Temperature Effects on Crack Tip Creep Behaviour of Hot Hammer Forged Ti-6Al-4V Alloy

Fang

Liu

Shao³

et al. 2023

Advances in Materials Science and Engineering

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The creep behaviour of hot hammer forged Ti-6Al-4V alloy under different forging temperatures has an essential influence on their high-temperature service performance. In this article, the high-temperature mechanical property and creep behaviour of Ti-6Al-4V alloy forging at different forging temperatures were first investigated experimentally. Then, in view of the critical effect of microcracks and other defects on the service life of components in forging, the creep characteristics at the tip of a 2 mm crack were characterized by the finite element method. The results show that when the Ti-6Al-4V alloy was forged at 1000°C, the high-temperature mechanical property was improved, and the steady-state creep rate and creep residual deformation were significantly reduced. In addition, the creep strain and creep rate at the crack tip were decreased apparently during creep, and the creep strain gradient in the crack tip region was also significantly reduced. This indicates that the creep deformation of Ti-6Al-4V alloy can be controlled by an appropriate forging temperature during hot hammer forging process and might delay the crack propagation to improve the service life of components.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Forging Temperature Effects on Crack Tip Creep Behaviour of Hot Hammer Forged Ti-6Al-4V Alloy

Fang

Liu

Shao³

et al. 2023

Advances in Materials Science and Engineering

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“…(1) Developed conditional program to remove the complex data. The expanded program is very user-friendly and adaptable to any other application [30,31] (2) The probability approach allows the possibility of a specific category, which is the most valuable and advantageous to use or evaluator based on the matching diagnosis system concept used by the expert system…”

Section: Resultsmentioning

confidence: 99%

Smart Diagnostic Expert System for Defect in Forging Process by Using Machine Learning Process

Mewada

Saroliya²,

Chandramouli³

et al. 2022

Journal of Nanomaterials

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Integrating machine learning into one of the manufacturing processes, i.e., forging, is mainly concerned with making the system more intelligent by incorporating them to exhibit global understanding. Sometimes the engineer/operator can find the defects during or after the forging operation. So, the system will need some input to identify the different types of categorized defects. And also, according to that, we will develop the intelligent fault diagnosis process. We should calculate the statistical probability theory. Now, we implement the system which is the structure of the fault analysis system for the forging process. In the structure, we demonstrate the defect of the forged part, use the given imported probability to find the possible causes, and provide some remainders to reduce the fault. For enhancement of feature needs, this work includes more integration of AI with forging.

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“…Ti6Al4V is an α+β titanium (Ti) alloy extensively used in automobile, aerospace, nuclear, and chemical industries [1]. It exhibits high corrosion resistance, high-temperature mechanical properties, and lower density [2]. It is principally used in the aero-engine blisk assembly [3].…”

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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Optimization of Forging Process Parameters and Prediction Model of Residual Stress of Ti‐6Al‐4V Alloy

Cited by 6 publications

References 23 publications

Forging Temperature Effects on Crack Tip Creep Behaviour of Hot Hammer Forged Ti-6Al-4V Alloy

Forging Temperature Effects on Crack Tip Creep Behaviour of Hot Hammer Forged Ti-6Al-4V Alloy

Smart Diagnostic Expert System for Defect in Forging Process by Using Machine Learning Process

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

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