Measurement and Analysis of Shot Velocity in Pneumatic Shot Peening.

Ogawa, Kazuyoshi; Asano, Takashi; Saito, Akinori; Kawamura, Kazutaka; Ogino, Mineo; Aihara, Hideo

doi:10.1299/kikaic.60.1120

Cited by 19 publications

(14 citation statements)

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“…(8), V can be calculated as 24 m/s. Regarding the work by Ogawa et al (1994), V can be assumed from 100 to 200 m/s. Based on this assumption, the actual value of velocity might be between 20 and 200 m/s.…”

Section: > âmentioning

confidence: 99%

Effect of micro ploughing during fine particle peening process on the microstructure of metallic materials

Kameyama

Komotori

2009

Journal of Materials Processing Technology

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Section: > âmentioning

confidence: 99%

Effect of micro ploughing during fine particle peening process on the microstructure of metallic materials

Kameyama

Komotori

2009

Journal of Materials Processing Technology

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“…2. The shot velocities with conditions A and B, calculated with the empirical formula proposed by Ogawa et al, 7) were approximately 50 ms ¹1 and 55 ms ¹1 , respectively.…”

Section: Experiments Methodsmentioning

confidence: 88%

“…However, there is an area in the central part where a uniform velocity distribution is maintained. 7,8) The shot velocity is accelerated by the air, reaches its maximum value after a certain distance from the nozzle, and then decelerates. However, this deceleration is at a slower rate than the air, because of the inertial force of the shot.…”

Section: Effect Of Standoff Distance Lmentioning

confidence: 99%

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Measurement and Functional Approximation of Peening Intensity Distributions

Ohta

Inoue

2019

Mater. Trans.

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In the case of large components, shot peening is generally performed by moving peening equipment that follows a trajectory on the component surface using a robot. In this study, we aimed to obtain a functional approximation of the intensity (arc height of the Almen strip) distributions in the shot stream. The intensity distributions using various peening time and standoff distances were measured under two different experimental conditions. The measured intensity distributions were approximated by modified Gaussian distribution functions, which included the saturation curve. Three coefficients in the functions depended on the peening time and the standoff distance. For tilted shot peening, the intensity distributions were more complex because the standoff distance at each Almen strip was different. The intensity distributions of the tilted plates calculated by the modified Gaussian distribution function, which considered the variation in the standoff distance, were in good agreement with the experimental results. The intensity distributions of twice-shot peening differ from those of once-shot peening because the second peening area overlap with the first peening area. The modified Gaussian distribution function and the saturation function were used to determine the intensity distribution of a twice-shot peened sample. These calculated values were in good agreement with the experimental results.

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“…It is known that the smaller particle size makes an impact velocity greater (12) . Thus, the ratio h p /r gets greater when finer particles are used for FPP treatment.…”

Section: Dominant Factor Affecting the Transferring Behavior During Fmentioning

confidence: 99%

Effect of Fine Particle Peening (FPP) Conditions on Microstructural Characteristics of Ti-6Al-4V Alloy

Kameyama

Komotori

2008

JMMP

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The microstructure of Ti-6Al-4V alloy treated with Fine Particle Peening (FPP) was studied. The influence of different peening times, particle supply rates, and particle sizes on the microstructure was especially investigated. FPP treatment using steel particles created a modified microstructure with a lamellar feature beside the treated surface. The modified structure showed higher hardness comparing to the interior region and it was accompanied by Fe elements transferred from particles. Energy Dispersive X-ray Spectroscopy (EDS) analyses revealed that the amount of transferring Fe elements was increased as peening times and/or particle supply rates were increased. Fe transfer was also accelerated by FPP treatment using smaller particles. The reasons for this behavior were as follows: (1) plastic deformation induced by collisions of particles was effectively accumulated with an increase of peening time and particle supply rate, and (2) plastic deformation induced by collisions of particles became more severe as particle size decreased. The accumulation and severity of plastic deformation strongly affected the formation of the modified microstructure enriched with transferred elements.

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Measurement and Analysis of Shot Velocity in Pneumatic Shot Peening.

Cited by 19 publications

References 0 publications

Effect of micro ploughing during fine particle peening process on the microstructure of metallic materials

Effect of micro ploughing during fine particle peening process on the microstructure of metallic materials

Measurement and Functional Approximation of Peening Intensity Distributions

Effect of Fine Particle Peening (FPP) Conditions on Microstructural Characteristics of Ti-6Al-4V Alloy

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