Influence of process parameters of ultrasonic shot peening on surface roughness and hydrophilicity of pure titanium

This paper presents an investigation on the surface roughness of burnished hypereutectic Al-Si alloy ¾ a widely used light-weight and wear resistant material in automobile, electric and aircraft industries. Based on the techniques of Taguchi, an orthogonal experiment plan with the analysis of variance (ANOVA) is performed and a second-order regressive mathematical model is established. Meanwhile, the influence of process parameters on surface roughness and its mechanism are discussed. From the experiments, it is found that burnishing process is effective to decrease surface roughness of hypereutectic Al-Si alloy components, in which, all input parameters have a significant effect on the surface roughness. To achieve a small surface roughness, the optimum process parameters are recommended.

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3D Model of Shot Dynamics for Ultrasonic Shot Peening

Materials Science Forum ◽

10.4028/www.scientific.net/msf.768-769.503 ◽

2013 ◽

Vol 768-769 ◽

pp. 503-509 ◽

Cited By ~ 1

Author(s):

Jawad Badreddine ◽

Emmanuelle Rouhaud ◽

Matthieu Micoulaut ◽

Sebastien Remy ◽

Vincent Desfontaine ◽

...

Keyword(s):

Residual Stress ◽

Process Parameters ◽

Spatial Data ◽

Shot Peening ◽

3D Model ◽

Prediction Models ◽

Dissipated Energy ◽

Displacement Fields ◽

Ultrasonic Shot Peening ◽

Stress Prediction

This paper presents a 3D model that simulates an ultrasonic shot peening (USP) operation, using realistic process parameters and peening setups (part and chamber geometries). By simulating the shot dynamics (shot trajectories and impacts), statistical and spatial data are obtained for the peened component, i.e. surface coverage and coverage rate, impact speeds and angles, dissipated energy... This data can then be used for i) optimizing the design of peening chambers and process parameters and ii) predicting the residual stress and displacement fields induced by USP in the peened component. In fact, data from the 3D model can be used as initial data in existing residual stress prediction models. A chaining methodology was developed for this purpose and allows linking the choice of process parameters and USP setup to the induced residual stress displacement fields.

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Heat Transfer Enhancement by Shot Peening of Stainless Steel

Coatings ◽

10.3390/coatings10060584 ◽

2020 ◽

Vol 10 (6) ◽

pp. 584

Author(s):

Pramote Koowattanasuchat ◽

Numpon Mahayotsanun ◽

Sedthawatt Sucharitpwatskul ◽

Sasawat Mahabunphachai ◽

Kuniaki Dohda

Keyword(s):

Heat Transfer ◽

Surface Roughness ◽

Stainless Steel ◽

Process Parameters ◽

Shot Peening ◽

Cfd Simulation ◽

Cost Effective ◽

Transfer Coefficients ◽

Roughness Effects ◽

Heat Transfer Efficiency

In heat exchange applications, the heat transfer efficiency could be improved by surface modifications. Shot peening was one of the cost-effective methods to provide different surface roughness. The objectives of this study were (1) to investigate the influences of the surface roughness on the heat transfer performance and (2) to understand how the shot peening process parameters affect the surface roughness. The considered specimens were 316L stainless steel hollow tubes having smooth and rough surfaces. The computational fluid dynamics (CFD) simulation was used to observe the surface roughness effects. The CFD results showed that the convective heat transfer coefficients had linear relationships with the peak surface roughness (Rz). Finite element (FE) simulation was used to determine the effects of the shot peening process parameters. The FE results showed that the surface roughness was increased at higher sandblasting speeds and sand diameters.

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Preparation of high-oriented molybdenum thin films using DC reactive magnetronsputtering

Modern Physics Letters B ◽

10.1142/s0217984917500592 ◽

2017 ◽

Vol 31 (07) ◽

pp. 1750059 ◽

Cited By ~ 1

Author(s):

Zhengguo Shang ◽

Dongling Li ◽

She Yin ◽

Shengqiang Wang

Keyword(s):

Thin Film ◽

Thin Films ◽

Surface Roughness ◽

Process Parameters ◽

Gas Flow ◽

Lattice Mismatch ◽

Practical Significance ◽

Process Time ◽

Process Conditions ◽

Influence Of Process Parameters

Since molybdenum (Mo) thin film has been used widely recently, it attracts plenty of attention, like it is a good candidate of back contact material for CuIn[Formula: see text]Ga[Formula: see text]Se[Formula: see text]S[Formula: see text] (CIGSeS) solar cells development; thanks to its more conductive and higher adhesive property. Besides, molybdenum thin film is an ideal material for aluminum nitride (AlN) thin film preparation and attributes to the tiny (−1.0%) lattice mismatch between Mo and AlN. As we know that the quality of Mo thin film is mainly dependent on process conditions, it brings a practical significance to study the influence of process parameters on Mo thin film properties. In this work, various sputtering conditions are employed to explore the feasibility of depositing a layer of molybdenum film with good quality by DC reactive magnetron sputtering. The influence of process parameters such as power, gas flow, substrate temperature and process time on the crystallinity and crystal orientation of Mo thin films is investigated. X-ray diffraction (XRD) measurements and atomic force microscope (AFM) are used to characterize the properties and surface roughness, respectively. According to comparative analysis on the results, process parameters are optimized. The full width at half maximum (FWHM) of the rocking curves of the (110) Mo is decreased to 2.7[Formula: see text], and the (110) Mo peaks reached [Formula: see text] counts. The grain size and the surface roughness have been measured as 20 Å and 3.8 nm, respectively, at 200[Formula: see text]C.

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Modelling of the Ultrasonic Shot Peening Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.490-491.67 ◽

2005 ◽

Vol 490-491 ◽

pp. 67-72 ◽

Cited By ~ 7

Author(s):

C. Pilé ◽

Manuel François ◽

Delphine Retraint ◽

Emmanuelle Rouhaud ◽

Jian Lu

Keyword(s):

Process Parameters ◽

Vibration Frequency ◽

Shot Peening ◽

Boltzmann Distribution ◽

Perfect Gas ◽

Average Speed ◽

Speed Distribution ◽

Almen Intensity ◽

Ultrasonic Shot Peening ◽

The Impact

The aim of this work is to reach a better understanding of the ultrasonic shot-peening process and, in particular, the evolution of the shot speed distribution. A simple 1D modelling of the interaction between the shots and the sonotrode is carried out. The impact is considered as inelastic with an energy absorption that depends on the speed of the shot. It is found that after about 10 interactions (» 1s) the speed distribution in the chamber follows a Maxwell-Boltzmann distribution, which is the distribution found in a perfect gas at equilibrium. The influence of various process parameters such as the sonotrode amplitude, the vibration frequency on the average speed and on the Almen intensity is studied.

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Experimental Investigation on Surface/Subsurface Damage in Rotary Ultrasonic Machining of Glass BK7

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.325-326.1357 ◽

2013 ◽

Vol 325-326 ◽

pp. 1357-1361 ◽

Cited By ~ 1

Author(s):

Yan Hua Huang ◽

Dong Xi Lv ◽

Yong Jian Tang ◽

Hong Xiang Wang ◽

Hai Jun Zhang

Keyword(s):

Surface Roughness ◽

Ultrasonic Vibration ◽

Process Parameters ◽

Subsurface Damage ◽

Spindle Speed ◽

Feed Speed ◽

Ultrasonic Machining ◽

Rotary Ultrasonic Machining ◽

Cutting Depth ◽

Influence Of Process Parameters

Experiments were carried out to study the effect of ultrasonic vibration on the surface roughness and subsurface damage (SSD) in rotary ultrasonic machining (RUM) of glass BK7. As a comparison, some conventional grinding (CG) experiments were also performed under the same process parameters with there of the RUM ones. The surface roughness of the RUM/CG samples was measured with a surface profilometer. The SSD of these specimens was assessed and characterized by a measuring microscope with the help of the taper polishing method. Also, the influence of process parameters (cutting depth, feed speed, and spindle speed) on the surface/subsurface quality was discussed. As a result, both the surface roughness and the SSD depth of the RUM/CG specimens were reduced with the increased spindle speed, while increased with the increasing of feed speed and cutting depth of the diamond tool. Compared with the CG process, the introduction of ultrasonic vibration resulted in the higher surface roughness and SSD depth, due to the fact that the max cutting depth of the abrasive in the RUM process increased by an amplitude compared with that in the CG process.

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