Evolution of surface mechanical properties and microstructure of Ti 6Al 4V alloy induced by electropulsing-assisted ultrasonic surface rolling process

Wang, H.; Song, Guolin; Tang, Guoyi

doi:10.1016/j.jallcom.2016.04.067

Cited by 99 publications

(19 citation statements)

References 48 publications

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“…In recent years, the USRP technique, which combines the advantages of DR, ultrasonic impact treatment [ 10 ], and LPB, has shown a number of advantages [ 11 , 12 , 13 , 14 ]. The principle of the USRP is that electrical energy can be transformed into mechanical energy via piezoelectric ceramics.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Ultrasonic Surface Rolling Process on the Fretting Fatigue Behavior of Ti-6Al-4V Alloy

Liu

Zhang

et al. 2017

Materials

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The effect of the ultrasonic surface rolling process (USRP) on the rotary bending fretting fatigue (FF) of Ti-6Al-4V alloy was investigated. The reason for the USRP’s ability to improve the FF resistance of Ti-6Al-4V alloy was studied. The results revealed that the USRP induced a compressive residual stress field with a depth of 530 μm and a maximum residual stress of −930 MPa. Moreover, the surface micro-hardness of the USRP sample was significantly higher than that of the untreated base material (BM) sample, and the USRP yielded a 72.7% increase in the FF limit of the alloy. These further enhanced fatigue properties contributed mainly to the compressive residual stress field with large numerical value and deep distribution, which could effectively suppress FF crack initiation and early propagation. The USRP-induced surface work-hardening had only a minor impact on the FF resistance.

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Section: Introductionmentioning

confidence: 99%

Effect of the Ultrasonic Surface Rolling Process on the Fretting Fatigue Behavior of Ti-6Al-4V Alloy

Liu

Zhang

et al. 2017

Materials

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“…At this time, hardness and grains refinements are significantly enhanced during the repeated striking. However, during the severe striking process, the remarkable hardening in surface strengthened layer induced by SPD shows an extreme obstruct for the further plastic deformation [1]. Lu et al [26] proposed that the severe plastic deformation would cause the introduction of large amounts of immobile dislocations and boundaries, which would restrict the further grain refinement.…”

Section: Significant Improvement In Strengthened Layermentioning

confidence: 99%

“…Surface processing techniques, known as an effective way to strengthen the material surface and keep chemical composition unchanged inside the materials, would significantly enhance material performances with less ductility loss of the whole components. For titanium and its alloy, the poor surface integrity has been the major obstacle for their widespread applications [1]. Thus, further improving the surface properties of titanium and its alloys by surface processing techniques is indispensable.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Surface Mechanical Properties and Microstructure Evolution of Commercial Pure Titanium Under Electropulsing-Assisted Ultrasonic Surface Rolling Process

Sun

et al. 2018

Acta Metall. Sin. (Engl. Lett.)

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The effects of electropulsing-assisted ultrasonic surface rolling process on surface mechanical properties and microstructure evolution of commercial pure titanium were investigated. It was found that the surface mechanical properties were significantly enhanced compared to traditional ultrasonic surface rolling process (USRP), leading to smaller surface roughness and smoother morphology with fewer cracks and defects. Moreover, surface strengthened layer was remarkably enhanced with deeper severe plastic deformation layer and higher surface hardness. Remarkable enhancements of surface mechanical properties may be related to the gradient refined microstructure, the enhanced severe plastic deformation layer and the accelerated formation of sub-boundaries and twins induced by coupling effects of USRP and electropulsing. The primary intrinsic reasons for these improvements may be attributed to the thermal and athermal effects caused by electropulsing treatment, which would accelerate dislocation mobility and atom diffusion.

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“…Установленный в данной работе факт, заключающийся в том, что поток частиц может возбуждать дискретные бризеры в кристаллах, открывает новые возможности интерпретации экспериментальных данных [1][2][3][4][5][6][7][8][9][10][11][12][13], ука-зывающих на значительный вклад атермических эффек-тов в диссипацию энергии потока частиц. Дискретные бризеры, не являясь топологическими дефектами, но аккумулирующие энергию порядка 1 eV и способные обмениваться этой энергией [16], могут за время своего существования повлиять на дефектную структуру кри-сталлов [1,2,16,[46][47][48].…”

Section: выводыunclassified

“…Электрический ток, пропускаемый через металл в ходе его пластической деформации, способствует увеличению пластичности и снижению напряжения течения [5][6][7]. Электрический ток может применяться одновременно с ультразвуковой обработкой металлов, способствуя повышению свойств их поверхности [8]. Снижение напряжения течения за счет облучения пучком электронов с энергией 0.5 МeV отмечено в поликристаллических образцах алюминия и меди при их растяжении [9].…”

Section: Introductionunclassified

Возбуждение Щелевых Дискретных Бризеров В Кристалле Состава a-=sub=-3-=/Sub=-B Потоком Частиц

Zakharov¹,

Старостенков²,

Ерёмин³

et al. 2017

Физика Твердого Тела

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Методом молекулярной динамики проведено моделирование генерации дискретных бризеров в кристалле состава A3B на примере Pt3Al путем приложения к атомам случайных однонаправленных импульсов, моделирующих воздействие потока частиц. Выявлены два возможных механизма возбуждения щелевых дискретных бризеров с мягким типом нелинейности в зависимости от энергии частиц в потоке. В случае если частица способна передавать атому Al энергию более 1.4 eV, возбуждение дискретного бризера может происходить единственной частицей. В противном случае образование дискретного бризера происходит при множественных столкновениях частиц с атомами Al, что возможно только при достаточно высокой плотности частиц, поскольку каждая следующая частица должна передавать свой импульс атому Al прежде, чем затухнут его колебания, вызванные предыдущими частицами. ПВЗ, АМЕ благодарят за финансовую поддержку РФФИ (грант N 16-42-220002 р\_а), ЕАК, СВД благодарят за финансовую поддержку РНФ (грант N 16-12-10175). DOI: 10.21883/FTT.2017.02.44037.281

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Evolution of surface mechanical properties and microstructure of Ti 6Al 4V alloy induced by electropulsing-assisted ultrasonic surface rolling process

Cited by 99 publications

References 48 publications

Effect of the Ultrasonic Surface Rolling Process on the Fretting Fatigue Behavior of Ti-6Al-4V Alloy

Effect of the Ultrasonic Surface Rolling Process on the Fretting Fatigue Behavior of Ti-6Al-4V Alloy

Enhanced Surface Mechanical Properties and Microstructure Evolution of Commercial Pure Titanium Under Electropulsing-Assisted Ultrasonic Surface Rolling Process

Возбуждение Щелевых Дискретных Бризеров В Кристалле Состава a-=sub=-3-=/Sub=-B Потоком Частиц

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