Effect of spindle speed during ultrasonic rolling on surface integrity and fatigue performance of Ti6Al4V alloy

Pang, Zhiwei; Wang, Shuaixing; Yin, Xiaole; Yu, Shouming; Du, Na

doi:10.1016/j.ijfatigue.2022.106794

Cited by 27 publications

(15 citation statements)

References 34 publications

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“…Geometric model. Since evaluating the residualstress field on the Ti6Al4V plate surface is critical for ultrasonic-rolling fatigue-strength evaluation, 35,36 the ultrasonic-rolling process was first performed in this study using the ABAQUS software. Notably, this model adopted a dynamic display-analysis step, combined with an actual spherical indenter and plate size, to satisfy the plate size.…”

Section: Finite-element Simulationmentioning

confidence: 99%

Analysis of the residual stress and surface morphology of TI6AL4V using elastoplastic contact ultrasonic rolling

Jiahui

Jiayuan

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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As ultrasonic rolling mainly affects the residual stress and surface morphology of Ti6Al4V, it is of great significance to study different process parameters, such as amplitude, static pressure, time, and step length, thereby improving the performance of Ti6Al4V. However, unstable bouncing caused by the elastic relationship between the indenter and the sample is inevitable. Based on finite-element analysis and Hertz contact theory, the concept of critical damping was proposed to quickly stabilize the system. Therefore, a three-dimensional finite-element model was established using the ABAQUS software, after which the ultrasonic-rolling process was simulated by applying static pressure on the sample surface using a spring. Then, the distribution of residual stress under different amplitudes, static pressures, times, and step lengths was analyzed. Based on simulation and experimental results showed that the maximum residual stress of −689.802 MPa was obtained when the amplitude, static pressure, and time were 10 µm, 600 N, and 0.064 s, respectively. When the step length was 1/2 of the indentation width, the surface stress concentration was obvious, convex defects were large, and surface roughness Ra increased to 1.076 µm. Investigations also revealed that when the step length was 1/8, Ra decreased by 39.68% compared with that when the step length was 1/2, the thickness of the plastic-deformation layer reached 56.07 µm. When the step length was 1/10, the maximum compressive residual stress reached −888.007 MPa and Ra increased. On the basis of the abovementioned optimization parameters, the influence of step length on the properties of Ti6Al4V alloy was further explored, and direction for the strengthening process of Ti6Al4V alloy by studying the pattern of surface strengthening was presented.

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Section: Finite-element Simulationmentioning

confidence: 99%

Analysis of the residual stress and surface morphology of TI6AL4V using elastoplastic contact ultrasonic rolling

Jiahui

Jiayuan

Wang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…24 Compared to the above technologies, surface rolling process can integrate the three factors mentioned above. [25][26][27][28][29] First, the rolling process can effectively improve the hardness of microstructure and introduce dominant residual compressive stresses in the surface layer. Second, the ball path of this process is regular and has a surface polishing effect, which can substantially improve the surface smoothness.…”

Section: Introductionmentioning

confidence: 99%

“…For different metallic materials, the fatigue life can be increased by several times to even an order of magnitude. 27 However, given the processing characteristics of the technology, it is currently only applicable to axisymmetric components, such as the rod-shaped samples. For the platy components widely used in engineering equipment, there is currently no relevant process or equipment to achieve the rolling processing.…”

Section: Introductionmentioning

confidence: 99%

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A study of shot peening and spinning rolling on fatigue of Al 7075 alloy samples

Guan,

Zhang,

Gong

et al. 2024

Fatigue Fract Eng Mat Struct

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Surface mechanical strengthening is an effective way to improve the fatigue performance, among which surface rolling has been vastly utilized for its significant enhancement in fatigue strength. However, traditional rolling process is only suitable for components with rotational symmetry, limiting its application. Herein, a newly developed technology named “spinning rolling (SR)” was developed to strengthen the surfaces of platy components. A common Al alloy, 7075, was selected for verifying the effect. It is found that compared with the most popular technology, shot peening (SP), SR can provide deeper and higher residual stress, lower surface roughness, and comparable hardening layer, and consequently, significantly higher fatigue lives. Accordingly, there is a transition in the fatigue crack source from point‐like to line‐like, confirming a strong crack propagation resistance along depth direction. This study indicates the advantages of the SR technology, providing a greater resistance against fatigue damage of platy components.

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“…However, the rolling process is challenging to control. It cannot process parts with poor rigidity, such as slender rods and thin wall pipe fittings, mainly due to the severe deformation that frequently occurs on their surface [23].…”

Section: Introductionmentioning

confidence: 99%

Micromorphology, Microstructure, and Wear Behavior of AISI 1045 Steels Irregular Texture Fabricated by Ultrasonic Strengthening Grinding Process

Xiao

Zhao

Xie

et al. 2022

Metals

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In this study, the tribological properties of three AISI 1045 steel samples were investigated. Two samples were treated with ultrasonic shot peening (USP) and ultrasonic strengthening grinding process (USGP), respectively, while the other one was only treated with a polishing process. Sample properties, such as surface morphology, roughness, microhardness, elastic modulus, frictional coefficient, and phase structures were analyzed. Results show that the sample treated with USGP had the best tribological properties. It realized the highest surface roughness, microhardness, and elastic modulus. Compared with a polished sample, the roughness of the sample treated with USGP increased by 157%, and the microhardness and elastic modulus improved by 32.8% and 21.3%, respectively. Additionally, USGP provided an average frictional coefficient of 0.4, decreasing approximately 45% compared to polishing. The possible mechanisms of USGP surface texturing were discussed. The findings denote that USGP could be an efficient approach to improve the fatigue life of some mechanical components.

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Effect of spindle speed during ultrasonic rolling on surface integrity and fatigue performance of Ti6Al4V alloy

Cited by 27 publications

References 34 publications

Analysis of the residual stress and surface morphology of TI6AL4V using elastoplastic contact ultrasonic rolling

Analysis of the residual stress and surface morphology of TI6AL4V using elastoplastic contact ultrasonic rolling

A study of shot peening and spinning rolling on fatigue of Al 7075 alloy samples

Micromorphology, Microstructure, and Wear Behavior of AISI 1045 Steels Irregular Texture Fabricated by Ultrasonic Strengthening Grinding Process

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