Effect of pre-treatment with fine particle peening on surface properties and wear resistance of gas blow induction heating nitrided titanium alloy

Takesue, Shogo; Kikuchi, Shoichi; Akebono, Hiroyuki; Misaka, Yoshitaka; Komotori, Jun

doi:10.1016/j.surfcoat.2018.11.088

Cited by 42 publications

(14 citation statements)

References 37 publications

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“…However, they exhibit poor tribological properties [ 6 , 16 ] due to their low resistance to shear deformation [ 7 ], which limits their use in various applications [ 3 , 4 ]. For instance, some relatively poor tribological properties of Ti alloys (low abrasive wear resistance, low fretting wear resistance, and high coefficient of friction (CoF) [ 3 , 14 , 17 , 18 ]) limit their usage as hip replacements [ 19 , 20 ] and other artificial joint material [ 14 , 21 ]. Additionally, even a minor surface degradation of Ti alloys caused by contact may trigger catastrophic failure mechanisms such as fatigue and corrosion, which tend to start from previously damaged surface sites.…”

Section: Introductionmentioning

confidence: 99%

Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

et al. 2020

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Ti6Al4V alloy was shot peened by using stainless-steel shots with different sizes (0.09–0.14 mm (S10) and 0.7–1.0 mm (S60)) for two durations (5 and 15 min) using a custom-designed peening system. The shot size was the main parameter modifying the roughness (0.74 µm for S10 vs. 2.27 µm for S60), whereas a higher peening time slightly increased roughness. Hardness improved up to approximately 35% by peening with large shots, while peening time was insignificant in hardness improvement. However, longer peening duration with large shots led to an unwanted formation of micro-cracks and delamination on the peened surfaces. After dry sliding wear tests, the mass loss of peened samples (S60 for 15 min) was 25% higher than that of un-peened samples, while the coefficient of friction decreased by 12%. Plastically deformed regions and micro-scratches were observed on the worn surfaces, which corresponds to mostly adhesive and abrasive wear mechanisms. The present study sheds light on how surface, subsurface and tribological properties of Ti6Al4V vary with shot peening and peening parameters, which paves the way for the understanding of the mechanical, surface, and tribological behavior of shot peened Ti6Al4V used in both aerospace and biomedical applications.

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Section: Introductionmentioning

confidence: 99%

Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

et al. 2020

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“…This occurs in metals that are easily nitrided, such as titanium. 23,24) According to the elemental concentration measurement shown in Fig. 9, Al-rich compounds, such as Fe 2 Al 5 and AlN, were predominantly formed at the outermost surface, while the created compounds changed to Al-diffused ferrite (Fe(Al)) in the subsurface region of the substrate.…”

Section: Mechanism Of the Surface Modified Layer Formation By Aih-fppmentioning

confidence: 99%

Formation of Fe–Al Intermetallic Compound Layer by AIH-FPP and its Effect on Tribological Properties of Stainless Steel

Takesue

Misaka²,

Komotori

2021

ISIJ Int.

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In order to increase the surface hardness and improve the tribological properties of stainless steel, Fe-Al intermetallic compound layers were created by atmospheric-controlled induction-heating fine particle peening (AIH-FPP). The surface microstructure of the stainless steel treated with AIH-FPP was characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, and micro-Vickers hardness testing. In addition, the tribological properties were investigated by reciprocating ball-on-disk wear tests. When high-speed steel particles coated with thin aluminum layers were used as the shot particles, Fe-Al intermetallic compound layers were formed at the surfaces of the stainless steel with increased heating time during AIH-FPP. This is because aluminum was transferred from the shot particles, and the temperature at the treated surface increased as a result of a combustion synthesis reaction. When the heating temperature after FPP was increased, the transferred aluminum and nitrogen in the atmosphere reacted, which resulted in the formation of aluminum nitrides in addition to Fe-Al intermetallic compounds. The tribological properties of the stainless steel were improved by AIH-FPP since high-hardness layers were created. The results indicate that the formation of an Fe-Al intermetallic compound layer with high hardness by AIH-FPP is effective for modifying the tribological properties of the stainless steel within a relatively short span of time.

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“…Plasma nitriding was conducted at temperatures of 873 K and 973 K, lower than that for conventional nitriding, in an atmosphere of H 2 and N 2 (13:5 ratio) for 18 ks to produce a nitrided layer at the powder particle surfaces; low temperature nitriding effectively suppresses grain-coarsening of titanium-based materials. 12,13,15,25,2836) The plasma-nitrided powders were subsequently consolidated by SPS at 1073 K, 1273 K, or 1473 K for 1.8 ks under a vacuum of less than 15 Pa and a pressure of 50 MPa. CP titanium having a bimodal nitrogen diffusion structure (4 mm thick, 15 mm diameter) was produced using a 15 mm internal diameter graphite die.…”

Section: Materials and Specimenmentioning

confidence: 99%

Microstructural Characterization and Wear Behavior of Sintered Compacts Fabricated from Plasma-Nitrided Commercially Pure Titanium Powder

2020

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The microstructure of commercially pure (CP) titanium having a bimodal nitrogen diffusion phase for biomedical applications, which was fabricated by sintering plasma-nitrided powders, was characterized, and its effect on the wear behaviors was examined. The maximum nitrogen concentration and hardness of CP titanium having a bimodal nitrogen diffusion phase depended on the powder plasma nitriding and sintering temperatures. The grain size of CP titanium made by sintering plasma-nitrided powders is smaller than that of the un-nitrided one. As results of ball-on-disk dry friction tests, CP titanium fabricated from powder plasma-nitrided at 873 K had lower wear resistance than compacts manufactured by sintering as-received CP titanium powder. In contrast, CP titanium fabricated from powder plasma-nitrided at 973 K having a continuous connected network nitrogen diffusion phase had high wear resistance due to the high hardness and differences in the wear mechanism. The wear resistance of CP titanium is dependent on the powder plasma nitriding and sintering temperatures.

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Effect of pre-treatment with fine particle peening on surface properties and wear resistance of gas blow induction heating nitrided titanium alloy

Cited by 42 publications

References 37 publications

Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

Surface, Subsurface and Tribological Properties of Ti6Al4V Alloy Shot Peened under Different Parameters

Formation of Fe–Al Intermetallic Compound Layer by AIH-FPP and its Effect on Tribological Properties of Stainless Steel

Microstructural Characterization and Wear Behavior of Sintered Compacts Fabricated from Plasma-Nitrided Commercially Pure Titanium Powder

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