Effect of the impact energy of various peening techniques on the induced plastic deformation region

Kanou, Shinya; Takakuwa, Osamu; Mannava, Seetha R.; Qian, Dong; Vasudevan, Vijay K.; Soyama, Hitoshi

doi:10.1016/j.jmatprotec.2012.05.003

Cited by 31 publications

(14 citation statements)

References 18 publications

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“…It is estimated that the surface of the material was hardened due to solid particle erodents. As similar to Kanou et al at 90° impingement angle, solid particle erodents hit the surface and make the surface more hardened. By this way, the flexural modulus values of eroded PPS composites at 90° impingement angle were improved according to uneroded composite samples.…”

Section: Resultssupporting

confidence: 63%

Possible use of volcanic ash as a filler in polyphenylene sulfide composites: Thermal, mechanical, and erosive wear properties

et al. 2014

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It is a common practice to use particle materials as fillers to improve engineering properties of polymer composites and to lower the cost of final products. There is an obvious cost advantage of compounding volcanic ash (VA) in polymers, either to replace traditional fillers. This study is concerned with thermal, mechanical, and erosive properties of VA‐filled polyphenylene sulfide (PPS) composites. Composite samples containing VA particles at various concentrations (0, 2.5, 5, 10, 15, and 20 wt%) were manufactured by twin screw extruder and injection molding machine. Thermal properties were investigated by thermogravimetric and dynamic mechanical analysis methods. Erosive wear properties were investigated by performing solid particle erosion tests at 30º and 90º impingement angles. The mechanical properties such as flexural strength and modulus of uneroded samples and residual flexural strength and modulus of eroded composite samples were determined by three‐point bending tests. Results show that thermal, mechanical, and residual mechanical properties of the PPS composite were significantly improved by adding VA, although erosion resistance was decreased markedly. It was concluded that VA can be used as a reinforcement in PPS composites to improve thermal and mechanical properties and to reduce the cost of the PPS composites. POLYM. COMPOS., 35:1826–1833, 2014. © 2014 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 63%

Possible use of volcanic ash as a filler in polyphenylene sulfide composites: Thermal, mechanical, and erosive wear properties

et al. 2014

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“…The first one occurs at relatively low initial abrasive particle velocity. 23 And the other three are substantiated in Figure 4 where the case of a = 10°s erves as a representative. As shown in Figure 4(a), the abrasive particle rebounds after it impacts the target plate, while an apparent pit is left on the impacted surface.…”

Section: Numerical Results and Discussionmentioning

confidence: 76%

A numerical and experimental study of oblique impact of ultra-high pressure abrasive water jet

Kang

Liu

et al. 2016

Advances in Mechanical Engineering

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An investigation of the abrasive water jet with an emphasis on the oblique impact of abrasive particles on the target plate is performed. Ultra-high jet pressure necessitates a close examination of the phenomena featured by small spatial and temporal scales. The effect of oblique impact is assessed from both numerical and practical aspects. Numerical simulation, implemented using the commercial code LS-DYNA, allows a detailed inspection of transient stress wave propagation inside the target plate. And impact experiments facilitate a qualitative description of resultant footprints of oblique water jet. Different incident angles of abrasive particles are adopted and a comparison is thereby unfolded. The results indicate that rebound, embedding, and penetration of single abrasive particle are three representative final operation states. Adjacent to the abrasive particle, the response of the target plate to oblique impact is reflected by von Mises stress distribution and plate deformation as well. Oblique impact arouses non-symmetrical stress wave distributions and distinct unbalanced node displacements at the two sides of the abrasive particle. As for the target plate, global surface morphology is in accordance with predicted effects. The most favorable surface roughness is not associated with vertical impact, and it hinges upon the selection of standoff distance. Furthermore, variation of surface roughness with incident angle is not monotonous.

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“…Cavitation peening introduces high compressive residual stress since cavitation bubbles collapsing produce very high impact of the order of gigapascals and beyond, which are more severe than the impact produced by collisions between shot and the surface. Also, the strain velocity when the impact due to bubble collapsing deforms the surface is much higher than that produced by the impact of shot [22]. This difference gives rise to the differences in compressive residual stress and, as a result, the longer fatigue life.…”

Section: Resultsmentioning

confidence: 98%

Using Cavitation Peening to Improve the Fatigue Life of Titanium Alloy Ti-6Al-4V Manufactured by Electron Beam Melting

Sato¹,

Takakuwa²,

Nakai³

et al. 2016

MSA

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Although Electron Beam Melting (EBM) is an innovative technology, the fatigue properties of materials manufactured by EBM may be lower than those of casted and wrought materials due to defects and surface roughness. In order to enhance the fatigue life of components or structures manufactured by EBM, a mechanical surface treatment technology, e.g., peening, would be effective because peening introduces high compressive residual stress at the surface which can extend the fatigue life considerably. In the present study, specimens were manufactured by EBM using titanium alloy Ti-6Al-4V powder. Two types of specimens were prepared: as-built and as-machined specimens. Specimens of each type were treated by cavitation peening or shot peening. The fatigue lives of the specimens were evaluated by a plate bending fatigue tester. The residual stress and surface roughness were also evaluated. The results obtained showed that the fatigue strength of as-built specimens can be improved by 21% by cavitation peening or shot peening, and the fatigue life under particular applied stresses can also be extended by 178% by cavitation peening.

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Effect of the impact energy of various peening techniques on the induced plastic deformation region

Cited by 31 publications

References 18 publications

Possible use of volcanic ash as a filler in polyphenylene sulfide composites: Thermal, mechanical, and erosive wear properties

Possible use of volcanic ash as a filler in polyphenylene sulfide composites: Thermal, mechanical, and erosive wear properties

A numerical and experimental study of oblique impact of ultra-high pressure abrasive water jet

Using Cavitation Peening to Improve the Fatigue Life of Titanium Alloy Ti-6Al-4V Manufactured by Electron Beam Melting

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