Influences of particle collision treatments on surface characteristics and fatigue strength of Ti-6Al-4V alloy

Morita, Tatsuro; Miyatani, Atsushi; Kariya, Shota; Kumagai, Masao; Takesue, Shogo; Komotori, Jun

doi:10.1016/j.rinma.2020.100128

Cited by 11 publications

(15 citation statements)

References 10 publications

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“…Thus, we speculate that the microstructure near the treated surface was refined through dynamic recrystallization or grain subdivision. [17,18] Figure 3. a) N maps obtained by EPMA analysis of the cross section of modified Ti-6Al-4V treated for 0, 1, 10, and 30 s. b) Relationship between the equivalent thickness, t eq , of the nitrided layer formed on the surface of modified Ti-6Al-4V and the square root of the treatment time, √t.…”

Section: Microstructural Characterizationmentioning

confidence: 99%

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Rapid Nitriding of Titanium Alloy with Fine Grains at Room Temperature

et al. 2021

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Section: Microstructural Characterizationmentioning

confidence: 99%

“…Thus, we speculate that the microstructure near the treated surface was refined through dynamic recrystallization or grain subdivision. [ 17,18 ]…”

Section: Microstructural Characterizationmentioning

confidence: 99%

Rapid Nitriding of Titanium Alloy with Fine Grains at Room Temperature

et al. 2021

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“…improving the fatigue strength of the Ti6Al4V alloy in a previous study. 9) The FPB and SP treatments comprised two procedures. The former treatment using high-speed steel particles was aimed at forming hardened layers and introducing compressive residual stresses, whereas the latter treatment using SiO 2 particles was aimed at reducing the surface roughness.…”

Section: A D V a N C E V I E Wmentioning

confidence: 99%

“…The results of the AN series for comparison were obtained from a previous study. 9) 3. Results and Discussion…”

Section: Characterizationmentioning

confidence: 99%

“…Fine particle bombarding (FPB) and SP were performed using appropriate conditions derived from a previous study. 9) The surface morphologies, microstructures, hardness distributions, and residual stresses were analyzed, and their relationships with the mechanical and fatigue properties were analyzed comprehensively. Herein, FPB and SP are collectively referred to as particle collision treatments.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Particle Collision Treatments on Fatigue Strength of Ti–6Al–4V Alloy with Polishing Marks

et al. 2021

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In this study, we attempted to nullify the harmful influences of processing marks on the fatigue strength of Ti6Al4V alloy by particle collision treatments. As the surface treatments, fine particle bombarding (FPB) and shot peening (SP) were applied to form hardened layers and introduce compressive residual stress. The surface of the objective material was polished to a mirror surface to eliminate the influences of machining on specimens and was then grinded with emery papers (#80) to make uniform processing marks. After the particle collision treatments, the surface conditions, hardness distributions and residual stress were systematically examined, and their relationships with the fatigue strength were considered in detail. On observation of the surfaces, the processing marks were eliminated by the particle collision treatments. At the same time, the surface hardness was increased and high compressive residual stress was introduced. As a result, the fatigue strength was markedly improved by the treatments beyond the level of the material with the processing marks without deterioration of the mechanical properties. The improvement rates of the fatigue strength were high, at 75% by FPB treatment and 58% by SP treatment.

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