The Effect of Surface Roughness on Contact Fatigue Behavior Using Mesoscopic Approach

Kim, Tae Wan; Cho, Yongjoo

doi:10.1007/s11249-009-9510-y

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…The surface integrity and fatigue life of a machined Ti-Al alloy were also studied by Mantle et al [16] The results show that the microcracks (with a depth less than 20 μm) produced in the turning process of the titanium alloy can reduce the life of the parts. In recent years, Lee et al [17] and Bhaumil et al [18] calculated the effect of roughness on the contact fatigue using mesoscopic methods. The results showed that the fatigue properties of the materials with a roughness greater than 0.4 μm will be significantly affected.…”

Section: Introductionmentioning

confidence: 99%

Residual Stress of a TC17 Titanium Alloy after Belt Grinding and Its Impact on the Fatigue Life

Xiao

et al. 2018

Materials

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Titanium alloy materials are widely used in the design of key parts, such as aeroengine blades and integral blades. The surface residual stress has a great influence on the fatigue life of the parts mentioned above. Presently, abrasive belt grinding can form residual stress on the surface. However, the formation mechanism has not yet been revealed, providing the impetus for the present study. First of all, the surface residual stress is characterized based on Bragg’s law. The influence of contact force, reciprocating frequency, and feed speed on the residual stress of a titanium alloy abrasive belt grinding is obtained using an experimental method. The residual stress model is simulated by the tensile force on the surface of the model, and the fatigue life of the bar under a sinusoidal tensile load is analyzed by simulating the fatigue test of the titanium alloy bar. Finally, fatigue testing and fracture analysis are carried out. The experimental results show that with the increase of the grinding contact force, increase of the reciprocating frequency, and decrease of the feed speed, the residual compressive stress on the surface of the parts increases and the fatigue life is higher at the same working stress level. It also shows that the residual compressive stress produced by abrasive belt grinding is in the range of 120–300 MPa. The fatigue simulation curve’s inflection point appears at the level of 550 MPa. The error between the simulation data and the experimental data is less than 10%, which shows the accuracy of the simulation experiment. The fracture morphology at room temperature is a ductile fracture with fine equiaxed dimples.

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Section: Introductionmentioning

confidence: 99%

Residual Stress of a TC17 Titanium Alloy after Belt Grinding and Its Impact on the Fatigue Life

Xiao

et al. 2018

Materials

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“…In case of sinusoidal rough surfaces, it is observed that the site of crack initiation moves rapidly to the surface with the increase in amplitude of asperities. Also the smaller asperity heights produce relatively lower wear rate and the scuffing loads vary with the angle of roughness [19,20].…”

Section: Introductionmentioning

confidence: 99%

A theoretical study of ionic liquid lubricated μ-EHL line contacts considering surface texture

Thakre

Sharma

Harsha

et al. 2016

Tribology International

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“…The cavities of surface roughness formed structural notches which reducing of fatigue strength. Reducing the surface roughness from Ra = 2.5 m to Ra = 0.16 m can several dozen per cent of improve the fatigue strength [1,5]. The surface roughness is smaller, the smaller is the number of geometric and structural micro-notches.…”

Section: Introductionmentioning

confidence: 99%

Effect of Burnishing on the Contact Fatigue of Regenerative Thermally Sprayed Coatings

Starosta¹

2013

Journal of KONES. Powertrain and Transport

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This study of the resistance to contact fatigue of Ni-5%Al alloy coatings and Ni-5%Al-15%Al 2 O 3 composite coatings were evaluated. The coatings were prepared by flame spraying (Casto-Dyn DS 8000 torch) and plasma spraying (PN 120 plasma jet). The coatings were subjected to a finishing treatment: turning, burnishing and grinding. Depending on coatings phase composition and finishing treatment, the parameter mean values of surface roughness (Ra) were in the wide range of 0.28 to 2.61 m. The coatings after burnishing characterized by smallest of surface roughness. The largest value of the parameter Ra was observed in the case of coatings after turning. The presence of the reinforcing phase in the coating increases the surface roughness of thermally sprayed composite coatings. The hardness of coatings also depends on the finishing methods. The minimum hardness equal to 192 HV2 was found in the case of coatings of Ni-5%Al obtained by using a Casto-Dyn DS 8000 gas torch. Burnished Ni-5%Al-15%Al 2 O 3 coatings obtained by plasma spraying characterized by hardness 291 HV2. Resistance of fatigue surface of thermally sprayed coatings on a SCF (standing contact fatigue) test stand was assessed. The test was designed based on the guidelines of the PN-80/H-04324 Polish standard. During the fatigue tests were provided constant contact of co-acting parts, without slipping. Based on the survey it was found that the plasma sprayed coatings (PN120 plasma-jet) have a greater resistance to fatigue then the coatings obtained by flame spraying Casto-Dyn DS 8000 torch. Composite coatings of Ni-5%Al-15%Al2O3 are more resistant to contact fatigue, compared to the alloy coatings of Ni-5%Al. Burnishing increases the fatigue resistance of coatings when compared to turning. Burnished and polished surfaces are characterized by a similar contact fatigue resistance.

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The Effect of Surface Roughness on Contact Fatigue Behavior Using Mesoscopic Approach

Cited by 5 publications

References 23 publications

Residual Stress of a TC17 Titanium Alloy after Belt Grinding and Its Impact on the Fatigue Life

Residual Stress of a TC17 Titanium Alloy after Belt Grinding and Its Impact on the Fatigue Life

A theoretical study of ionic liquid lubricated μ-EHL line contacts considering surface texture

Effect of Burnishing on the Contact Fatigue of Regenerative Thermally Sprayed Coatings

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