Comparison of the reciprocating sliding wear of 58Ni39Ti-3Hf alloy and baseline 60NiTi

Khanlari, Khashayar; Ramezani, Maziar; Kelly, Piaras; Cao, Peng; Neitzert, Thomas

doi:10.1016/j.wear.2018.05.011

Cited by 28 publications

(13 citation statements)

References 25 publications

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“…Cracks can be observed distinctly in the subsurface images of the samples when the alloy was slid against GCr15, Al 2 O 3 , and ZrO 2 under dry friction. The strong adhesion between the ball and TiNi surfaces facilitates the evolution of these cracks [3]. Iron was clearly transferred to the tribo-layer, and the amount of oxygen significantly increased during the dry sliding against GCr15 in Fig.…”

Section: Sem Edx and Xps Analysis Of The Worn Surfaces Of Tini Alloymentioning

confidence: 92%

“…During the initial stage, the friction is low, smooth, and noise-free. Wear starts to occur in the second stage, where the COF value increases due to the partial breakage of the lubricant film caused by oil consumption [3]. The COF tends to remain at a high value with moderately wide fluctuations and maintains this level until the end of the test.…”

Section: Low-friction Behaviormentioning

confidence: 99%

“…4(b) were significantly changed when PAO10 was used for lubrication. They exhibited wide grooves and striations parallel to the sliding direction characteristic of the plastic deformation of the alloy [3,10] caused by the reciprocating motion of the counterparts. Lumps frequently appear on the wear surface of the alloys, albeit with different characteristics.…”

Section: Sem Edx and Xps Analysis Of The Worn Surfaces Of Tini Alloymentioning

confidence: 99%

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Self-lubrication of tribologically-induced oxidation during dry reciprocating sliding of aged Ti-Ni51.5 at% alloy

Yang

Duan

et al. 2020

Friction

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The tribological behaviors of Ti-Ni51.5 at% alloy strengthened by finely dispersed Ni4Ti3 particles in reciprocating sliding against GCr15, Al2O3, and ZrO2 at room temperature were studied. Interestingly, the coefficient of friction (COF) suffered a sheer drop (from 0.9 to 0.2) when the aged alloy slid against GCr15 at a frequency of 20 Hz under a 20 N load without lubrication. However, severe-mild wear transition disappeared when a solutionized alloy was used. Moreover, the COF stabilized at a relatively high level when Al2O3 and ZrO2 were used as counterparts, although their wear mechanisms showed signs of oxidation. Scanning electron microscopy (SEM) and X-ray element mappings of the wear scars of the counterparts clearly indicate that the formation of well-distributed tribo-layer and material transfer between the ball and disk are pivotal to the severe-to-mild wear transition in the aged Ti-Ni51.5 at% alloy/GCr15 friction pair. The higher microhardness and superelasticity of the aged alloy significantly accelerate the material transfer from GCr15 to the disk, forming a glazed protective tribo-layer containing Fe-rich oxides.

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Section: Sem Edx and Xps Analysis Of The Worn Surfaces Of Tini Alloymentioning

confidence: 92%

Section: Low-friction Behaviormentioning

confidence: 99%

Section: Sem Edx and Xps Analysis Of The Worn Surfaces Of Tini Alloymentioning

confidence: 99%

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Self-lubrication of tribologically-induced oxidation during dry reciprocating sliding of aged Ti-Ni51.5 at% alloy

Yang

Duan

et al. 2020

Friction

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“…Experiments using a 60NiTi pin sliding on 52100 steel were carried out with poly-alpha-olefin (PAO) oil and showed that the lubricant decreased the friction coefficient from 0.6 to 0.1 (relative to dry sliding) and improved wear resistance (Zeng et al, 2012). Tests with a linear reciprocating tungsten carbide ball on a 60NiTi plate using castor oil lubrication identified plastic deformation-induced abrasion as the primary wear mode (Khanlari et al, 2018a). In another study, it was found that friction and wear resistance of 60NiTi is worse than that of 440C stainless steel under castor oil lubrication with a sliding tungsten carbide ball (Khanlari et al, 2018b); in a follow-up study, the authors suggested this was due to 60NiTi exhibiting microscopic brittleness at the contact which allowed propagation of tensile microcracks leading to more wear (Khanlari et al, 2018c).…”

Section: Introductionmentioning

confidence: 99%

“…Further, linear reciprocating wear testing was used to study synthetic gear oil in sliding contacts (Khanlari et al, 2018a,b). These studies showed that a tungsten carbide ball sliding on a 60NiTi flat exhibited higher wear and friction than on a 440 C flat, although the reasons for this difference are still not fully understood (Khanlari et al, 2018a).…”

Section: Introductionmentioning

confidence: 99%

Grease Lubrication of Self-Mated 60NiTi Bearing Materials

2019

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60NiTi is an intermetallic alloy of nickel and titanium that exhibits a unique combination of properties, including hardness comparable to steel, almost twice the elasticity of steel, high corrosion resistance, and tensile strength comparable to ceramics. These properties are very desirable for bearing materials, especially those used in space applications where components must operate efficiently and reliably in harsh conditions. However, despite the fact that most bearings are grease lubricated, there has not been a systematic study of the tribo-performance of greases for 60NiTi lubrication. To address this, we compare the wear and friction of self-mated 60NiTi lubricated by different greases, including those currently used in space missions and general-purpose grease, in low speed sliding contacts. The results provide valuable information to guide selection of grease for 60NiTi contacts as well as lay the groundwork for possible development of new greases specifically for 60NiTi tribo-contacts.

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