Effect of ultrasonic surface rolling at low temperatures on surface layer microstructure and properties of HIP Ti-6Al-4V alloy

Li, Gang; Qu, Shenguan; Xie, Mingxin; Li, Xiaoqiang

doi:10.1016/j.surfcoat.2017.01.099

Cited by 69 publications

(21 citation statements)

References 19 publications

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“…With the dislocation accumulating at the grain boundaries, the dislocation density was increased. titanium material was only about 20 m to 60 m [15][16][17]. According to the Hall-Petch relationship [26], the microhardness of the material surface and severe plastic deformation layer could be increased by good grain refinement, and the work hardening effect will be produced by plastic compressive deformation, which resulted from the high frequency ultrasonic surface impacts.…”

Section: Resultsmentioning

confidence: 99%

“…Based on the methodology presented in the previous investigations of Qu et al on titanium alloy with hardness of 325 HV [15][16][17], the residual stress and hardened depth of modified layer was increased when the static force was increased from 600 N to 900 N. Hence, optimized processing parameters of USR were chosen and they are listed in Table 3. The applied static force was chosen at 900 N and the amplitude of vibration was set at 10 m. The frequency of ultrasonic vibration was respectively chosen at 20 kHz and 30 kHz, and an air compressor was used to support the static force at a certain air pressure.…”

Section: Methodsmentioning

confidence: 99%

“…13(b), (d), (f) and (g). The generation of these grooves and slip regions can be identified as abrasive wear during sliding [17].…”

Section: Wear Resistance and Wear Mechanismsmentioning

confidence: 99%

“…Aluminium and silicon were transferred from the (ceramic ball) counterface to the steel worn surfaces. It is indicated that a certain wear existed on the surface of ball, even though the Si 3 N 4 ceramic material has a much higher hardness of 1500 HV 0.5 [17,29]. Additionally, the increase of oxygen present on the worn surfaces of the untreated and treated materials can be considered evidence of the existence of oxidative wear.…”

Section: Wear Resistance and Wear Mechanismsmentioning

confidence: 99%

“…These strikes can be considered as having a micro-cold-forging process [14]. Similarly, ultrasonic surface rolling (USR) also has been applied to in a titanium alloy in previous work of Qu et al [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

The influence of ultrasonic surface rolling on the fatigue and wear properties of 23-8N engine valve steel

Lai

Lewis

et al. 2019

International Journal of Fatigue

Self Cite

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

“…13(b), (d), (f) and (g). The generation of these grooves and slip regions can be identified as abrasive wear during sliding [17].…”

Section: Wear Resistance and Wear Mechanismsmentioning

confidence: 99%

Section: Wear Resistance and Wear Mechanismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The influence of ultrasonic surface rolling on the fatigue and wear properties of 23-8N engine valve steel

Lai

Lewis

et al. 2019

International Journal of Fatigue

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The Effects of Laser‐Assisted Ultrasonic Nanocrystal Surface Modification on the Microstructure and Mechanical Properties of 300M Steel

Zhao

Liu

et al. 2020

Adv Eng Mater

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Herein, an innovative surface severe plastic deformation method, laser-assisted ultrasonic nanocrystal surface modification (LA-UNSM), is used to treat 300M ultra-high-strength steel. The results show that the synergistic effect of laser heating and ultrasonic striking results in a thicker plastic deformation layer in 300M steel compared with UNSM treatment alone. Moreover, the depth of the deformation layer gradually increases as the laser power level is increased. At the laser power of 68 W, the greatest thickness in the plastic deformation layer (%53.6 μm) is observed, which is 1.7 times the thickness in the UNSM-treated samples. In addition, the surface of 300M steel forms dense oxide following LA-UNSM treatment and the surface oxide concentration increases with laser power level. Because of the martensitic lath refinement, work hardening, and oxidation, the highest surface hardness is obtained after LA-UNSM treatment at 45 W. As higher plastic strain is induced when a smaller UNSM tip (1.5 mm) is used, the largest and deepest surface plastic deformation layer is obtained in the LA-UNSM-45 W-1.5 mm sample. However, the most significant hardness difference between LA-UNSM and UNSM is observed when the 4.0 mm tip is used. This study shows that LA-UNSM can effectively improve the hardness of highstrength metals.

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Microstructure and Mechanical Properties of AZ31B Magnesium Alloy via Ultrasonic Surface Rolling Process

Geng

Zhang

et al. 2021

Adv Eng Mater

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Ultrasonic surface rolling process (USRP) is a recently developed surface nanocrystallization technology which introduces ultrasonic into surface mechanical rolling technology. By means of USRP, a near‐polished,gradient nanostructured surface and high compressive residual stresses were generated on the AZ31B magnesium alloy. The electron backscattered diffraction is used to characterize the microstructure. It was found that the twinning was the main deformation mechanism in tensile test, while grain refinement and twinning were dominant during the USRP. The results show that the thick of affected layer was up to 600 μm and consisted of three layers: an ultrafine grain layer with thickness of about 180 μm on the topmost surface, a fine grain transition layer under ultrafine layer up to 420 μm and a twin layer distributed from the surface to 600 μm. Combined with Schmid factor (SF), evolution of twins and texture were analysed and were responsible for improvement of strength.

show abstract

Effect of ultrasonic surface rolling at low temperatures on surface layer microstructure and properties of HIP Ti-6Al-4V alloy

Cited by 69 publications

References 19 publications

The influence of ultrasonic surface rolling on the fatigue and wear properties of 23-8N engine valve steel

The influence of ultrasonic surface rolling on the fatigue and wear properties of 23-8N engine valve steel

The Effects of Laser‐Assisted Ultrasonic Nanocrystal Surface Modification on the Microstructure and Mechanical Properties of 300M Steel

Microstructure and Mechanical Properties of AZ31B Magnesium Alloy via Ultrasonic Surface Rolling Process

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