A Study on the Quantitative Description of the Seizure Behavior of Steels at Low Temperature in a Vacuum

Ouyang, Qin; Okada, Katsuzo

doi:10.1080/10402009808983752

Cited by 5 publications

(5 citation statements)

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“…Equation [4] was proposed by Lim and Ashby by supposing that the surfaces seize when the real contact area becomes equal to the nominal one. The authors found in the previous study that real contact area grew to a certain quantity when seizure occurred and it did not increase further (9). This phenomenon coincides well with the supposition of Lim and Ashby.…”

Section: Estimating Of Real Temperature On Friction Surfacessupporting

confidence: 84%

“…The details of the cryogenic systeln were described in a previous paper (9). The temperature in the sample chamber can be controlled in the range of 300K to 20K in a vacuum of to Pa by using a cryogenerator.…”

Section: Methodsmentioning

confidence: 99%

“…In an earlier paper (9), the authors showed that the initial time of seizure, t, was a function of the sample average temperature, T, in the form at dry surface conditions. Using the boundary condition: d=O, (dry surface), Eq.…”

Section: Mathematical Expressions Of Seizurementioning

confidence: 99%

“…The authors have investigated the seizure behaviors of several kind of steels when keeping the friction system at low temperatures with a cryogenic system set in a vacuum (9). It is found that sliding conditions can also be kept from seizing if the system temperature is lower than a critical value T,.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore the temperature of approximately 85K is considered as a critical value for the occurrence of seizure at dry sliding conditions. There as defined in a previous paper(9), the critical temperature, T,, is about 85K. Similarly the critical values for the samples of one monolayer and two monolayers are about 125k (45 min) and 150KFIg.…”

mentioning

confidence: 98%

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A Study On the Prediction of Seizure Behavior of Steels with Molecular Film Lubrication at Low Temperature in a Vacuum

Ouyang

Okada

2000

Tribology Transactions

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In order to investigate the seizure mechanism of sliding components, a series of friction tests were carried out by sliding a steel ball against a carbon steel plate lubricated with a LB molecular film in a vacuum of 10" to 1 0 "~a at the temperatures from 20K to 3OOK. The Vickers hardness of materials at 20K was also measured. The results indicate that initial times of seizure are strongly correlated with the low temperature hardness of the materials. There exists a critical value of initial temperature Tc for certain mating materials, below which the materials will not seize. The critical temperature is determined by the mechanical properties of the metals and not by surface lubrication. An empirical qualitative expression is introduced to give the relationship between the initial time of seizure and friction conditions, material properties and surface lubrication. The average temperature of friction surface was estimated by calculation. The calcrrlated results show that the critical temperature for friction surface is near the melting point of mating materials.

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Section: Estimating Of Real Temperature On Friction Surfacessupporting

confidence: 84%

Section: Methodsmentioning

confidence: 99%

Section: Mathematical Expressions Of Seizurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 98%

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