Machining Distortion of Titanium Alloys Aero Engine Case Based on the Energy Principles

Wang, Zibiao; Sun, Jianfei; Chen, Wuyi; Liu, Liangbao; Wang, Rongqiao

doi:10.3390/met8060464

Cited by 24 publications

(4 citation statements)

References 22 publications

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“…The deformation is determined by the total elastic strain energy ΠP of the part, which can be expressed as in Eq. ( 14) (Wang et al [35] and Liu et al [36]),…”

Section: Analysis Of the Deformation With Timementioning

confidence: 99%

Effects of residual stress and equivalent bending stiffness on the dimensional stability of the thin-walled parts

Gao

Lin

et al. 2022

Int J Adv Manuf Technol

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The monolithic thin-walled parts are widely used in the aeronautic and astronautic field because of its excellent mechanical performance and light weight, but the thin-walled parts are vulnerable to the machining deformation due to its low stiffness and high material removal rate.According to the relative basic theory, the stiffness and internal residual stress of the part are the critical factors affecting the dimensional stability. In this work, the influences of equivalent bending stiffness and residual stress on the dimensional stability of thin-walled parts are studied.Nine typical thin-walled parts in three groups with two materials (7075 aluminum alloy for A1~A3 and B1~B3, and Ti6Al4V titanium alloy for B4~B6) are machined and treated with different processes. Topology optimization technique is used to optimize the structure of parts to enhance the bending stiffness. Corresponding finite element method (FEM) simulations are carried out to further investigate the generation mechanism. The deformations in 312 hours after machining are measured using coordinate measuring machine, and the deformation changes of the parts are obtained and analyzed. Finally, based on topological optimization and 2 stress relief technology, a machining deformation control method for the monolithic thin-walled parts is proposed. Results show that the maximum and average deformations of thin-walled are evidently decreased using the proposed method.

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“…The deformation is determined by the total elastic strain energy ΠP of the part, which can be expressed as in Eq. ( 14) (Wang et al [35] and Liu et al [36]),…”

Section: Analysis Of the Deformation With Timementioning

confidence: 99%

Effects of residual stress and equivalent bending stiffness on the dimensional stability of the thin-walled parts

Gao

Lin

et al. 2022

Int J Adv Manuf Technol

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“…2Cr3WMoV steel is widely used in the gear members of aircraft engine fuel pump. With the increasing requirement of aero-engine power and speed, it is of great practical significance to carry out research on cavitation erosion-related materials of fuel pump gear (Wang et al , 2007; Gu et al , 2016; Liu, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effect of micro-particles on cavitation erosion behavior of 2Cr3WMoV steel

Zhao,

Ding,

et al. 2024

ACMM

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Purpose This paper aims to study the influence of microparticles on the surface cavitation behavior of 2Cr3WMoV steel; microparticle suspensions of different concentration, particle size, material and shape were prepared based on ultrasonic vibration cavitation experimental device. Design/methodology/approach 2Cr3WMoV steel was taken as the research object for ultrasonic cavitation experiment. The morphology, quantity and distribution of cavitation pits were observed and analyzed by metallographic microscope and scanning electron microscope. Findings The study findings showed that the surface cavitation process produced pinhole cavitation pits on the surface of 2Cr3WMoV steel. High temperature in the process led to oxidation and carbon precipitation on the material surface, resulting in the “rainbow ring” cavitation morphology. Both the concentration and size of microparticles affected the number of pits on the material surface. When the concentration of microparticles was 1 g/L, the number of pits reached the maximum, and when the size of microparticles was 20 µm, the number of pits reached the minimum. The microparticles of Fe3O4, Al2O3, SiC and SiO2 all increased the number of pits on the surface of 2Cr3WMoV steel. In addition, the distribution of pits of spherical microparticles was more concentrated than that of irregularly shaped microparticles in turbidity. Originality/value Most of the current studies have not systematically focused on the effect of each factor of microparticles on the cavitation behavior when they act separately, and the results of the studies are more scattered and varied. At the same time, it has not been found to carry out the study of microparticle cavitation with 2Cr3WMoV steel as the research material, and there is a lack of relevant cavitation morphology and experimental data.

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“…The results show that the residual stress of the semi-finished product can be adjusted by heat treatment and processing deformation can be reduced. Wang et al [9] discussed the finite element analysis of the turning process and drilling process of an aero engine. The results indicate that the deformation or strain energy of the optimized process reduced rapidly in the early stages, and gradually became stable at the end of the process.…”

Section: Introductionmentioning

confidence: 99%

Machining Distortion Minimization of Monolithic Aircraft Parts Based on the Energy Principle

Fan

Tian

et al. 2020

Metals

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Machining distortion is a recurring problem in the machining of monolithic aircraft parts. This paper aims to study the machining distortion minimization of monolithic aircraft parts. Firstly, the energy principle of machining distortion was analyzed. Then, a rapid prediction model of the final part distortion for beam parts was proposed based on the equivalent stress, and the initial bending strain energy contained in the final part was used to characterize the bending distortion risk of the final part. Numerical simulation and milling experiments verified the effectiveness of the proposed prediction model. The relative error between the experimental and calculated results does not exceed 26.5%. Finally, the influence of initial residual stress fluctuation, part geometry and the part location on part distortion was analyzed from the energy point of view. The obtained results indicated that the expected final part distortion can be minimized by adjusting these three factors.

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Machining Distortion of Titanium Alloys Aero Engine Case Based on the Energy Principles

Cited by 24 publications

References 22 publications

Effects of residual stress and equivalent bending stiffness on the dimensional stability of the thin-walled parts

Effects of residual stress and equivalent bending stiffness on the dimensional stability of the thin-walled parts

Effect of micro-particles on cavitation erosion behavior of 2Cr3WMoV steel

Machining Distortion Minimization of Monolithic Aircraft Parts Based on the Energy Principle

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