Effect of contact pressure on fretting fatigue of austenitic stainless steel

Nakazawa, Kôzô; Maruyama, Norio; Hanawa, Takao

doi:10.1016/s0301-679x(02)00135-4

Cited by 47 publications

(22 citation statements)

References 8 publications

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“…The maximum pressure is higher than the average pressure values used. With the increase of the average contact pressure, the non-uniformity of the contact pressure profile will decrease, as have studied austenitic stainless steel and come to similar conclusions [17].…”

Section: Metallographic Observation and Fracture Analysismentioning

confidence: 58%

Observation of fretting fatigue cracks of Ti6Al4V titanium alloy

Zhi-yan

Liu

et al. 2017

Materials Science and Engineering: A

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Using a test system developed in laboratory, the fretting fatigue mechanism of Ti6Al4V alloy has been studied, with analyses of fracture morphology and composition. The results show that fretting fatigue source area is semi-elliptical and occupies a small proportion of the total fracture surface. The area is relatively flat and smooth and shows traces of friction. With the increase of contact pressure, the depth of the source region first increases rapidly and then stabilizes, but the fatigue strength decreases rapidly and then stabilizes. Fretting causes severe oxidation of the surface. In the interface between the source and the fatigue propagation zone, the contents of O and Fe drop sharply.

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Section: Metallographic Observation and Fracture Analysismentioning

confidence: 58%

Observation of fretting fatigue cracks of Ti6Al4V titanium alloy

Zhi-yan

Liu

et al. 2017

Materials Science and Engineering: A

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“…It is difficult to explain a sudden serious decrease in life at a contact pressure of 20 MPa. The decrease in life at low contact pressures was probably brought about by local stress concentration at the fretted field proposed by Nakazawa 5,19 …”

Section: Resultsmentioning

confidence: 94%

“…The effect of the contact pressure on fretting fatigue has been studied by several researchers. Most of these studies have shown that fretting fatigue life decreased with an increase in contact pressure 4–7 . However, one author reported 8 that the fretting fatigue life exhibited a minimum at a certain contact pressure.…”

Section: Introductionmentioning

confidence: 99%

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Influence of contact pressure on fretting fatigue behaviour of AA 2014 alloy with dissimilar mating material

Sadeler

2006

Fatigue Fract Eng Mat Struct

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A B S T R A C TThe effect of contact pressure on the fretting fatigue behaviour of 2014 Al alloy which has been solution heat treated and age hardened (T6 heat treatment) with dissimilar mating materials, was investigated. The fretting fatigue configuration involved bridgetype contact pads on a flat fatigue specimen. Specimens were made of 2014 Al alloy and bridge-type pads were made AISI 4140 steel. All the fatigue tests were conducted at a rotational speed of 5000 rpm with a rotating bending fatigue machine (R = −1), using S-N curves to evaluate the fatigue and fretting fatigue properties. The fretting fatigue strength of the material subject to a T6 heat treatment condition at 1 × 10 7 cycles was dramatically reduced, as compared to that without fretting and with as-cast. The fretting fatigue life exhibited a variable behaviour with an increase in the contact pressure. A scanning electron microscope was employed to observe the fretting scars and fracture surfaces of the specimens. This analysis showed that cracks originated at the contact surface and crack orientations were approximately ±56 • from perpendicular to the loading direction.

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“…It has been reported that, if the tangential stress near the contact edge is higher, the surface damage would be more significant [17] and then a fretting crack easily nucleates [5]. The relative slip amplitude increases with increasing the pad rigidity, as shown in Fig.…”

Section: Effect Of Rigidity Of Contact Pad On Ff Strengthmentioning

confidence: 84%

Effect of contact pad rigidity and fretting fatigue design curve

Mutoh

Jayaprakash

Asai

et al. 2010

Trans Indian Inst Met

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In fretting fatigue the nucleation and early propagation of fatigue crack depends on the state of stress near the contact edge. Contact pad rigidity is one of the factors that influence the stress state near the contact edge, there by influencing fretting fatigue strength. In the present study the effect of contact pad rigidity on fretting fatigue strength of turbine steels (Ni-Cr-Mo-V steel specimen with 12 Cr steel contact pads) were investigated. To study the effect of contact pad rigidity, contact pads with different pad foot height were used. FEA was performed to evaluate the stress distribution near the contact edge. The results showed that with increase in contact pad rigidity the fretting fatigue strength decreased. The results obtained were explained based on the stress distribution near the contact edge evaluated by using FEA. By combining the experimental results and FEA, fretting fatigue design curves were proposed. relationship between rigidity of contact pad and fretting fatigue strength is also clarified and then fretting fatigue design based on rigidity of contact pad can be developed. These design curves helps in real industrial applications to avoid FF failures.In the present study the effect of contact pad rigidity on fretting fatigue strength was investigated by using the contact pads with different foot height and contact length. Finite element analysis (FEA) was also performed to evaluate the stress distribution and the relative slip amplitude at the contact edge. From the results, it is confirmed that the contact pad rigidity influences the stress state at the contact edge (tangential stress and compressive stress) and then plays a dominant role in determining FF strength. Finally, by combining the experimental and FEA results fretting fatigue design curves were proposed, based on the dependence of FF life on both the tangential stress and compressive stress at the contact edge. Experimental procedure 2.1 MaterialThe material used in the present study was Ni-Cr-Mo-V steel, which was commonly used for steam turbine rotors. The contact pads were made of 12 Cr steel, which was commonly used for steam turbine blades. To study the effect of contact pad rigidity, contact pad with four different foot heights were used. The dimensions of the specimen and the contact pads are shown in Figs. 1 and 2, respectively. The chemical composition and mechanical properties of the specimen and the pad materials are shown in Table 1 and 2, respectively.

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Effect of contact pressure on fretting fatigue of austenitic stainless steel

Cited by 47 publications

References 8 publications

Observation of fretting fatigue cracks of Ti6Al4V titanium alloy

Observation of fretting fatigue cracks of Ti6Al4V titanium alloy

Influence of contact pressure on fretting fatigue behaviour of AA 2014 alloy with dissimilar mating material

Effect of contact pad rigidity and fretting fatigue design curve

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