Experimental study of shock waves induced by high-power pulsed laser in AZ31B magnesium alloy

Zhang, Yongkang; Yu, Shuisheng; Yao, Hongbing; Fei, Wang; Ai-Guo, None Ren; Xu, Pei Quan

doi:10.7498/aps.59.5602

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…During the laser shock processing, the laser shock wave attenuation rate is subjected to the high-strain-rate effects. 21,22) When the number of impacts is increased to 2 and 3, the attenuation rate decreases owing to the high-strain-rate effects. Thus, at the same position, the pressure of shock wave is higher than that in the first laser shock peening treatment.…”

Section: Resultsmentioning

confidence: 99%

Prediction of micro indention depth of TC4 titanium alloy during laser shock processing

Zhang

2018

Jpn. J. Appl. Phys.

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Laser shock peening (LSP) is an effective surface treatment technology to regulate the residual stress and surface profiles of many metallic materials. The micro-indention produced on the metal surface after LSP is an important factor related to the surface profile. In this work, the microindention induced by LSP is investigated with theoretically and experimentally, and the residual stress in the micro-indention is also measured. The results show that the micro-indention is induced in the spot center, whose depth is proportional to the laser power density and laser pulse duration. It saturates with the number of impacts beyond 3. The micro-indention transfers materials in the spot center to the surroundings and induces convex deformation at the spot edge. The trend of the residual stress is similar to that of micro-indention depth. The micro-indention and convex deformation increase the peak-to-valley roughness R z at the edge.

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Section: Resultsmentioning

confidence: 99%

Prediction of micro indention depth of TC4 titanium alloy during laser shock processing

Zhang

2018

Jpn. J. Appl. Phys.

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“…Radziejewska et al [22] measured the impact load with PVDF connected to a 50 Ω resistor, and the cumulative charge on the resistor was calculated to obtain the shock process generated by a laser induced in the steel plate. In addition, several similar studies were conducted to look at the shock waves in different materials, such as aluminum alloy [23,24] and magnesium alloy [25].…”

Section: Introductionmentioning

confidence: 99%

Equivalent capacitor of polyvinylidene fluoride sensor and its influence on impact load measurement

Huang¹,

Li²,

Liao³

et al. 2021

Smart Mater. Struct.

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As one of the main components of the polyvinylidene fluoride (PVDF) piezoelectric sensor, the equivalent capacitor of PVDF will influence the electrical signal output when subjected to the impact load, thus influencing the accuracy of its measurement. However, in previous research, the equivalent capacitor of PVDF and its possible influence on measurement results have usually been ignored. In this paper, by changing the external resistance, the influence of the equivalent capacitor of PVDF on its electrical signal output characteristics when subjected to impact load is studied. The results show that at this time, the charge generated by the PVDF will be partially concentrated on the equivalent capacitor, and the amount of concentration is determined by the impact load characteristics, external resistance and equivalent capacitance. Therefore, in some cases, it is unreasonable to ignore the equivalent capacitor in previous research, and this may lead to some errors and even get completely wrong results. Considering the charge concentrated on the equivalent capacitor can effectively avoid the problems of conventional methods, and reflect the applied impact load more accurately. In addition, to improve the accuracy of the measurement, on the basis of quantitative evaluation of the influence of the equivalent capacitor on electrical signal output, this paper puts forward a design method of the test circuit; that is, for different types of impact load and measurement accuracy requirements, PVDF with appropriate capacitance and reasonable external resistance should be selected. The research in this paper is helpful for the impact load measurement of PVDF and will improve the accuracy of the measurement to a certain extent.

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Influence of high strain rate on the transient transmission of laser shock waves

Wang

et al. 2022

Shock Waves

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Experimental study of shock waves induced by high-power pulsed laser in AZ31B magnesium alloy

Cited by 5 publications

References 12 publications

Prediction of micro indention depth of TC4 titanium alloy during laser shock processing

Prediction of micro indention depth of TC4 titanium alloy during laser shock processing

Equivalent capacitor of polyvinylidene fluoride sensor and its influence on impact load measurement

Influence of high strain rate on the transient transmission of laser shock waves

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