Multifunction cavitation technology to improve the surface function of Al – Cu alloy

Ijiri, Masataka; Shimonishi, Daichi; Tani, Syunpei; Okada, Norihiro; Yamamoto, Masato; Nakagawa, Daisuke; Tanaka, Kumiko; Yoshimura, Toshihiko

doi:10.1016/j.ijlmm.2018.12.001

Cited by 6 publications

(6 citation statements)

References 6 publications

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“…In addition to the aforementioned processing techniques, a swirl flow nozzle (SFN) [ 19 , 20 ] was installed to increase the number and size of cavitation bubbles at the tip of the WJ nozzle. Attaching an SFN has been demonstrated to enable suppression of erosion traces formed in the central part when an Al surface is processed [ 19 , 21 ]. The inclusion of an SFN also reduces the extent of surface damage caused by cavitation bubbles that form around erosion traces.…”

Section: Experimental Methodsmentioning

confidence: 99%

High-temperature corrosion behavior of high-temperature and high-pressure cavitation processed Cr–Mo steel surface

Ijiri

Ogi

Yoshimura

2020

Heliyon

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In this paper, long-term high-temperature corrosion at 500 °C and high-temperature corrosion at the melting temperature of a corrosive ash mixture were examined because the use of high-temperature equipment such as boilers and gas turbines increases year over year. To investigate the optimum cavitation processing conditions for the specimens used in high-temperature corrosion tests, the surface properties of each processed specimen were examined. In specimens processed using multifunction cavitation (MFC), the compressive residual stress was high when the processing time was 10 min and the Cr content on the surface was greater than on the surface of an unprocessed specimen. On the other hands, in specimens subjected to water-jet peening (WJP), the compressive residual stress was high when the processing time was 10 min. In the present study, the processing time was selected to be 10 min and all high-temperature corrosion tests were conducted by the coating method. In the case of long-term high-temperature corrosion at 500 °C, the corrosion loss of the MFC-processed and WJP-processed specimens was small, whereas the corrosion loss of the unprocessed specimen was large.

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Section: Experimental Methodsmentioning

confidence: 99%

High-temperature corrosion behavior of high-temperature and high-pressure cavitation processed Cr–Mo steel surface

Ijiri

Ogi

Yoshimura

2020

Heliyon

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“…Masataka et al investigated the strain-hardening effect of CWJP. It was found that CWJP can improve the hardness of pure aluminum at the surface and subsurface layers and introduce pressurized residual stress to enhance the fatigue strength [20,21]. He et al used CWJP to strengthen a TC4 titanium alloy.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of 7075 Aluminum Alloy Strengthened by Cavitation Water Jet Peening at Different Scanning Speeds

Yang

Gao²,

Wang

et al. 2022

Crystals

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Shot peening technologies can improve the performance of materials and extend the service life of parts. Cavitation water jet peening (CWJP) is a new shot peening technology that uses the shear effect of a high-speed jet in a submerged environment to produce a cluster of bubbles, thereby achieving a significant increase in impact performance. In this paper, CWJP was used to strengthen the surface of the 7075 aluminum alloy (Al7075), and the effects of CWJP with different scanning speeds on its microstructure and mechanical properties were investigated. The morphology evolution revealed that the plastic deformation of the sample surface became more serious and the surface roughness increased with the decrease in scanning speed. The distribution of residual stress and microhardness along the depth direction of the Al7075 was measured before and after the CWJP impact, and it was found that CWJP causes work hardening on the surface of the Al7075 and can convert the subsurface tensile stress of the Al7075 into compressive stress. The mechanism of grain refinement of the Al7075 during plastic deformation was systematically revealed. Therefore, CWJP can effectively improve the surface properties of the 7075 aluminum alloy.

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“…Mechanochemical multifunction cavitation (MC-MFC) has recently been developed to improve the corrosion resistance of Mg [1][2][3][4]. In MC-MFC, phosphoric acid is used to form a corrosionresistant film.…”

Section: Introductionmentioning

confidence: 99%

“…It is possible to expand the specimen surface through repeated isothermal expansion and adiabatic compression to form large bubbles at temperatures of several thousand degrees Celsius and pressures of several billion pascals when the cavitation bubbles are irradiated by ultrasonic waves. Therefore, the growth process of cavitation bubbles is different from that in WJP [9]. In addition to these techniques, processing was carried out while introducing a liquid comprising a 10:1 mixture of water and phosphoric acid into the conduit of the water jet nozzle, as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Compressive Residual Stress on Film Formed by Mechanochemical Multifunction Cavitation Processing

Ijiri

Kato

Maeda

et al. 2021

MSF

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Recently, mechanochemical multifunction cavitation (MC-MFC) was developed to improve the corrosion resistance of the magnesium surface. MFC is a technology that combines water jet peening and ultrasound cavitation. MC-MFC is a technology that adds phosphoric acid to water. It can improve the corrosion resistance by forming a phosphate film on the Mg surface. Conventional anodic oxidation, plating, and chemical vapor deposition can improve corrosion resistance by forming a film on the Mg surface, but it is difficult to improve characteristics such as compressive residual stress on the surface. MFC-treated surfaces have previously imparted various properties such as imparting compressive residual stress necessary to improve the fatigue strength to Al alloys and Cr-Mo steels. In this study, the effect of film formed on MC-MFC processed surface on compressive residual stress was investigated.

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Multifunction cavitation technology to improve the surface function of Al – Cu alloy

Cited by 6 publications

References 6 publications

High-temperature corrosion behavior of high-temperature and high-pressure cavitation processed Cr–Mo steel surface

High-temperature corrosion behavior of high-temperature and high-pressure cavitation processed Cr–Mo steel surface

Performance Analysis of 7075 Aluminum Alloy Strengthened by Cavitation Water Jet Peening at Different Scanning Speeds

Effect of Compressive Residual Stress on Film Formed by Mechanochemical Multifunction Cavitation Processing

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