Study on surface modification of aluminum 6061 by multiple ultrasonic impact treatments

The ultrasonic impact cladding (UIC) of steel surface using titanium alloy pins is comparatively studied. The cross-sectional appearance, roughness, hardness, and corrosion properties of EQ70 high-strength low-alloy steel specimens after UIC were compared to those after ultrasonic impact treatment (UIT) with steel pins. And the effects of substrate strength and pin diameter on the UIC layer were investigated. Results show that the specimens treated by the UIC have lower roughness and better corrosion resistance than the UIT-treated specimen. The hardness of the pin, as well as the hardness and strength of the treated material, has a decisive effect on the thickness and element content of the cladding layer. The prerequisite for generating a cladding layer on the steel surface with the UIC is that fragments should be produced from the pin under the impact.

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“…The folded defect is also formed in the aluminum alloy by large plastic deformation induced by UIT. 28…”

Section: Resultsmentioning

confidence: 99%

“…The folded defect is also formed in the aluminum alloy by large plastic deformation induced by UIT. 28 The surface morphologies of the UIT-treated specimen and UIC-treated specimen are shown in Figure 3. The surface roughness R a of each sample is also marked in Figure 3.…”

Section: Cross-sectional Appearance and Roughnessmentioning

confidence: 99%

A comparative study of ultrasonic impact cladding of steel surface using titanium alloy pin

Liu

Tian

Wang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…Currently the corrosion of pump components in seawater is mainly divided into seawater corrosion, galvanic corrosion and chink corrosion [8].The damage mainly occurs on the surface of the materials. Therefore, surface treatment technologies, such as chemical surface heat treatment [9], laser shock peening [10], surface shot peening [11], and ultrasonic impact technology [12], and other surface treatment technologies are adopted to improve the surface properties of the materials. Ultrasonic impact technology uses the impact needle of ultrasonic impact equipment to impact the surface of the material at high frequency to generate ultrasonic shock wave, thereby producing plastic deformation on the surface of the material, leading to the refinement of the internal microstructure and the introduction of effective residual stress, thus improving the hardness, wear resistance, and corrosion resistance of the surface of the material [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, surface treatment technologies, such as chemical surface heat treatment [9], laser shock peening [10], surface shot peening [11], and ultrasonic impact technology [12], and other surface treatment technologies are adopted to improve the surface properties of the materials. Ultrasonic impact technology uses the impact needle of ultrasonic impact equipment to impact the surface of the material at high frequency to generate ultrasonic shock wave, thereby producing plastic deformation on the surface of the material, leading to the refinement of the internal microstructure and the introduction of effective residual stress, thus improving the hardness, wear resistance, and corrosion resistance of the surface of the material [10][11][12][13][14][15]. Compared with other surface treatment technologies, ultrasonic impact technology has the advantages of larger residual stress, better process controllability, more uniform machined surface, simple equipment, and low maintenance cost.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ultrasonic Impact Strengthening on Surface Properties of 316L Stainless Steel Prepared by Laser Selective Melting

Hansong

Zhang

et al. 2022

Coatings

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In order to study the effect of ultrasonic impact (UIP) on the microstructure and properties of 316L stainless steel prepared by selective laser melting (SLM), the hardness of the surface layer and depth direction of the sample were tested with a micro hardness tester. Finally, the friction and wear test of the sample was assessed using a friction and wear tester. The electrochemical corrosion test was carried out on the samples before and after the ultrasonic shock using a CHI660E electrochemical workstation. The results show that after the ultrasonic impact on the 316L stainless steel prepared by SLM, the surface produces plastic deformation and work hardening, which improves the hardness of the material surface and enhances the wear resistance of the sample surface. With ultrasound shocks affecting the near surface of the sample, a deformation layer of about 100 μm depth is formed. After the ultrasonic shock treatment, the self -corrosion potential of the sample in the 3.5% NACl solution is slightly higher than the unproofed sample, and the density of the self -corrosion current is also lower than the unproofed sample., indicating that ultrasonic shock can reduce the corrosion rate of the material surface and enhance the abrasion resistance of the sample surface.

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“…Li et al [14] investigated the effect of multiple ultrasonic impact treatments on surface properties of Al6061, and the results showed that the surface roughness value reduces to 0.19 μm and then remains stable after ones ultrasonic impact, while the surface hardness reaches the maximum of 128HV after three times impact. Li et al [15] carried out an experimental study of ultrasonic rolling Ti-6Al-4V under different frequency and static pressure and analysed the effect of different parameters on surface properties, and they concluded that the static pressure is the most effective factor on surface properties.…”

Section: Introductionmentioning

confidence: 99%

Overall evaluation of the surface integrity in two-dimensional ultrasonic surface rolling 7050 Al alloy

Zheng

Zhu

Liu

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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To improve the anti-fatigue performance and the service life of parts made of 7050 aluminium alloy, the surface integrity of the workpiece treated by two-dimensional ultrasonic surface rolling (TDUSR) was comprehensively evaluated, and the optimization methods of the process parameters were proposed in this paper. The orthogonal experimental method was used to design an experiment program for TDUSR 7050 aluminium alloy. Based on the experimental results, the entropy weight method was used to make objectively weight for each quantifiable evaluation index. The technique for order preference by similarity to an ideal solution (TOPSIS) improved by the grey relational analysis (GRA) was presented to evaluate the surface integrity. Quadratic regression analysis was applied to establish prediction models for the surface roughness, microhardness, residual stress and the close degree. The optimal process parameters for the surface integrity were obtained using planning solution based on the prediction models. The results show that the static load and the feed rate have significant effects on the surface integrity, and their contributions are 60.52% and 28.05%, respectively. The maximal close degree obtained by planning solution is bigger than that obtained by TOPSIS improved by GRA. The validation test result proves that the overall evaluation method of TOPSIS improved by GRA combined with prediction modelling method by quadratic regression analysis can provide comparatively better process parameters and obtain more desirable process responses.

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Study on surface modification of aluminum 6061 by multiple ultrasonic impact treatments

Cited by 14 publications

References 27 publications

A comparative study of ultrasonic impact cladding of steel surface using titanium alloy pin

A comparative study of ultrasonic impact cladding of steel surface using titanium alloy pin

Effect of Ultrasonic Impact Strengthening on Surface Properties of 316L Stainless Steel Prepared by Laser Selective Melting

Overall evaluation of the surface integrity in two-dimensional ultrasonic surface rolling 7050 Al alloy

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