Analysis of the Initial Corrosion Stage of a Steel Disk Under the Influence of Stress

As a fundamental study of the squeal of a railway wheel running on a corrugated rail, frictional experiments using a thin steel disk and a rod and analysis were performed. A disk representing the railway wheel was clamped at the center with a free periphery and subjected to periodic excitation in its axial direction. When the frequency of excitation is not close to any natural frequency of the disk, squeals with a single nodal diameter mode occur. Squeals at the natural frequency of the disk fall into resonance with the frequency of the excitation, provided that the two frequencies are the same. Then two kinds of squeals occur: squeal at entrained frequency and that at both the entrained frequency and the frequency of another vibrational mode of the disk.

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Etching Mechanism of a Rotating Steel Disk Electrode in 49-54 mass% Ferric Chloride Solutions

Zairyo-to-Kankyo ◽

10.3323/jcorr1991.54.526 ◽

2005 ◽

Vol 54 (11) ◽

pp. 526-531

Author(s):

Yoshikazu Miyata ◽

Norimichi Inagi ◽

Shukuji Asakura ◽

Satoshi Tanaka ◽

Ryuji Ueda

Keyword(s):

Ferric Chloride ◽

Disk Electrode ◽

Chloride Solutions ◽

Steel Disk ◽

Etching Mechanism

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QUESTION OF APPLICABILITY OF THE CALCULATION ASSESSMENT METHOD OF RESISTANCE FOR DETAILS AFTER THERMAL DIFFUSION HARDENING

The Russian Automobile and Highway Industry Journal ◽

10.26518/2071-7296-2018-3-412-420 ◽

2018 ◽

Vol 15 (3) ◽

pp. 412-420 ◽

Cited By ~ 1

Author(s):

V. E. Ovsyannikov ◽

V. I. Vasilyev

Keyword(s):

Cast Iron ◽

Thermal Diffusion ◽

Gray Cast Iron ◽

High Strength ◽

Assessment Method ◽

Gray Cast ◽

Specific Work ◽

Experimental Check ◽

Steel Disk

Introduction.The article discusses the question of applicability of the calculation assessment method of resistance for details from gray cast iron after thermal diffusion hardening. The purpose of research is to check applicability of the calculated model for determination of intensity in case of the variable blanket hardness.Materials and methods.The model of intensity dependence on contact of two disks of friction gear is used in the research. Calculated determination of parameters is executed in two options: contact of the steel disk and disk from gray cast iron with the strengthened layer, and contact of the steel disk and disk from the tempered high-strength cast iron. Thus, roughness corresponding to the earned extra surface in contact zone is created. Experimental check of received results is carried out by means of specific work of abrasive wear definition for gray cast iron with the strengthened layer and the high-strength tempered cast iron.Results.As a result, it was established that the resistance of details from gray cast iron with the strengthened layer is comparable to high-strength cast iron after hardening. The results of experimental check prove the obtained calculations since the parameters values of resistance received would be well coordinated. Therefore, the possibility of the calculated resistant technique usage for such case could be considered as proved one and, therefore, it could be used at design calculations of the frictional units containing details from gray cast iron with the strengthened layer.Discussion and conclusions.The considered way of superficial hardening needs to be applied depending on features of operation on frictional unit. In such case, when the allowed values of wear change in wide limits (for example, brakes, coupling, etc.) it would be better not to subject a blanket to machining where the formation of optimum parameters of friction surfaces happened in natural way, or it would be necessary to delete an allowance. This suggests that the calculation method of the determination of layer resistance enables to define concrete values of an allowance which needs to be deleted.

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Investigation of Inhibitor Polyphosphate Properties for Rotating Steel Disk Electrode in Potassium Nitrate Solution

Eurasian Chemico-Technological Journal ◽

10.18321/ectj375 ◽

2016 ◽

Vol 2 (2) ◽

pp. 167

Author(s):

E.A. Dorokhova ◽

B.D. Burkitbaeva ◽

I.B. Melsitova ◽

T.Z. Ahkmetov ◽

V.I. Kapralova

Keyword(s):

Experimental Data ◽

Protective Effect ◽

Steel Surface ◽

Nitrate Solution ◽

Potassium Nitrate ◽

Disk Electrode ◽

Experimental Conditions ◽

Inhibiting Action ◽

Steel Disk ◽

Potassium Nitrate Solution

<p>Inhibition properties of a number of glass-like polyphosphates on 65J steel were investigated using the gravimetry and methods potassium nitrate solution polarization curves in a 0,1M (pH=6,05). The possibilities<br />of optimum experimental conditions were considered as well. Basing on the experimental data the inhibition coefficient and protective effect were found. The inhibiting action of polyphosphates, apparently, is due to the formation of inhomogeneous protecting film on the steel surface.</p>

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Elastic-plastic analysis for wet multidisc brake during repeated braking

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1177/0954406215605334 ◽

2016 ◽

Vol 230 (17) ◽

pp. 2968-2981 ◽

Cited By ~ 5

Author(s):

Zhanling Ji ◽

Yunhua Li ◽

Rui Xi ◽

Juntao Jia

Keyword(s):

Plastic Deformation ◽

Finite Element ◽

Heat Load ◽

Virtual Work ◽

Thermal Structure ◽

Element Analysis ◽

Steel Disk ◽

Dimensionless Stress ◽

Deformation State ◽

Evolution Laws

To reveal the mechanism and evolution laws of the braking performance declining from heat load in the repeated braking applied for wet multidisc brake, a finite element analysis was carried out by using the bidirectional thermal-structure coupling method. Based on the fundamental principles of the energy conservation and virtual work principle, the elemental equations between temperature and heat load, and deformation displacement and load with heat transferring boundary conditions and heat–structure interaction were derived. Taking a steel disk in the brake for example, the deformation state of its elements, and the starting time, the location, the severity, and evolution laws of the plastic deformation were analyzed and demonstrated by using dimensionless stress distribution contours. The area in contact along the interface and the ratio of the element numbers to produce plastic deformation to the total element numbers on the steel disk were described by contact ratio and plasticity ratio, respectively. Moreover, the results under the repeated braking case were compared with that under the lasting braking case, which indicates that the influence of the temperature load on the performance declining of the repeated braking case is much lower than one of the lasting braking case, and the temperature is lower than 40 K and the plasticity ratio is smaller than 0.35 after the braking time is longer than 350 s. The conducted finite element analyses provided the theoretical fundamentals for the design and the application of the brake in the heavy type of trucks.

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Study of Residual Stresses Induced by Sliding Wear

Journal of Tribology ◽

10.1115/1.3261019 ◽

1985 ◽

Vol 107 (2) ◽

pp. 195-199 ◽

Cited By ~ 5

Author(s):

D. Mairey ◽

J. M. Sprauel ◽

M. Chuard ◽

J. Mignot

Keyword(s):

Carbon Steel ◽

Residual Stresses ◽

Sliding Wear ◽

Wear Track ◽

Single Point ◽

The State ◽

Normal Stresses ◽

Steel Disk ◽

Pin On Disk ◽

Bearing Ball

A XC carbon steel disk was submitted to the friction of a 100 C 6 steel bearing ball on a pin-on-disk tribometer. The geometry of the surface was periodically measured as was the state of the stresses, on a single point of the wear track using a very simple location process. The wear track was quickly grooved while the normal stresses (parallel to the plane of the surface) increased fast. The shearing stresses remain weak.

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Friction and Wear of Semicrystalline Polymers Sliding Against Steel Under Water Lubrication

Journal of Lubrication Technology ◽

10.1115/1.3251590 ◽

1980 ◽

Vol 102 (4) ◽

pp. 526-533 ◽

Cited By ~ 45

Author(s):

Kyuichiro Tanaka

Keyword(s):

Surface Roughness ◽

Stainless Steel ◽

Boundary Lubrication ◽

Friction And Wear ◽

Semicrystalline Polymers ◽

Water Lubrication ◽

Slight Reduction ◽

Steel Sphere ◽

Steel Disk ◽

Polymer Wear

Two types of experiments were carried out in this work. In one experiment, the smooth steel sphere was slid on polymer plates at a very low speed. Water reduced to some extent or very much the friction of polymers. In another experiment, the polymer pins were rubbed against the stainless steel disk at various speeds. In the sliding of polymers on the disk without the transferred polymer, a slight reduction of friction generally occurred under boundary lubrication; however, it occurred clearly in some cases on the disk with the transferred polymer. In these experiments, surface roughness plays an important role in boundary lubrication with water. The wear of polymers increases generally under lubrication. The amount of polymer transferred under lubrication is similar to that transferred in the dry condition. However, the features of worn surfaces of polymers under lubrication are different from those in a dry condition. The mechanism of polymer wear under lubrication is discussed on the basis of these findings.

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