scholarly journals Experimental Assessment of the Depth of the Deformed Layer in the Roller Burnishing Process

2019 ◽  
Vol 290 ◽  
pp. 03008
Author(s):  
Marek Kowalik ◽  
Tomasz Trzepiecinski
Keyword(s):  
Cross Section ◽  
Precise Determination ◽  
Roller Burnishing ◽  
Elastic Zone ◽  
Original Measurement ◽  
The Face ◽  
Burnishing Process ◽  
Deformed Layer ◽  
Slight Deformation

This paper presents the methods of experimental determining the depth of the plastically deformed top layer in the roller burnishing process. Precise determination of the depth of the plastically deformed layer is difficult due to slight deformation at the boundary of the plastic and elastic zone, the lack of visible changes in the microstructure, and minimal changes in microhardness. The article shows the method of original measurement method that consists in determining the thickness of the deformed layer using rings. The method involves the profilographometric measurements of the disconnected rings (samples) which are flat-faced in the package on the mandrel. The rings material deforms plastically in the surface layer causing wrapping of the end face of the ring in the direction of the rolling tool movement. After dismantling the ring pack, measurements were made on the face of each ring along radial directions, and the thickness of the deformed layer was observed on the microscope. The method was verified by microhardness measurements in the cross-section and cross-section of the ring. The results of deformation depth measurements were verified by finite-element-based numerical simulation.

scholarly journals Experimental and Numerical Analysis of the Depth of the Strengthened Layer on Shafts Resulting from Roller Burnishing with Roller Braking Moment

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5844
Author(s):  
Marek Kowalik ◽  
Tomasz Trzepieciński ◽  
Leon Kukiełka ◽  
Piotr Paszta ◽  
Paweł Maciąg ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Surface Layer ◽  
Rolling Resistance ◽  
Original Method ◽  
Pressure Force ◽  
Roller Burnishing ◽  
Braking Torque ◽  
Burnishing Process ◽  
Deformed Layer ◽  
Dependence Relationship

The article presents the results of investigations into the depth of the plastically deformed surface layer in the roller burnishing process. The investigation was carried out in order to obtain information on the dependence relationship between the depth of plastic deformation, the pressure on the roller and the braking torque. The research was carried out according to the original method developed by the authors, in which the depth of plastic deformation is increased by applying a braking torque to the burnishing roller. In this method, it is possible to significantly increase (up to 20%) the depth of plastic deformation of the surface layer. The tests were carried out on a specially designed device on which the braking torque can be set and the force of the rolling resistance of the roller during burnishing can be measured. The tests were carried out on specimens made of C45 heat-treatable carbon steel. The dependence of the depth of the plastically deformed surface layer was determined for a given pressure force and variable braking moments. The depth of the plastically deformed layer was measured on the deformed end face of the ring-shaped samples. The microhardness in the sample cross-section and the evolution of the microstructure were both analysed.

A Precise Determination of the Total Cross Section of Uranium-235 from 0.000818 ev to 0.0818 ev

1959 ◽  
Vol 6 (5) ◽  
pp. 433-440 ◽  
Author(s):  
G. J. Safford ◽  
W. W. Havens ◽  
B. M. Rustad
Keyword(s):  
Total Cross Section ◽  
Cross Section ◽  
Precise Determination

scholarly journals Explosion waves and shock waves. VII.The velocity of detonation in cast T.N.T

1949 ◽  
Vol 197 (1048) ◽  
pp. 51-72 ◽  
Keyword(s):  
Cross Section ◽  
Crystal Size ◽  
Maximum Velocity ◽  
Precise Determination ◽  
Direct Measure ◽  
And Shock Waves ◽  
Maximum Value ◽  
Full Cross Section ◽  
Velocity Of Detonation

The Buxton rotating-mirror camera has been used for the precise determination of velocities of detonation in cylinders of cast T.N.T. The method has an advantage over the indirect Dautriche method in that it affords a direct measure of the velocity. The effects on the velocity of detonation of the following variables have been studied in so far as each can be independently varied: ( a ) the purity and crystal size, ( b ) the diameter and ( c ) the degree of confinement. Correlation of the observations with those of the velocity of detonation shows that cast T.N.T. may undergo stable or unstable detonation according as the crystals are small or large respectively. The unstable regime is characterized by the failure of the detonation wave to be propagated uniformly over the full cross-section of the cylinder of explosive. The velocity of detonation of T.N.T. rises as the diameter of the cylinder is increased from a ‘boundary diameter’, below which there is no propagation, to a ‘limiting diameter’ at which the velocity reaches a maximum value. In castings of density 1.625 the maximum velocity is 6950 m./sec. The value of the boundary diameter is a measure of the sensitivity to propagation. The effect of heavy confinement Is to reduce the boundary and limiting diameters; the maximum velocity, however, remains unaltered and confinement has therefore the same effect as an increase in diameter in an unconfined charge.

EFFECTS OF THE W-BOSON WIDTH IN e+e−→W+W− REACTIONS

1986 ◽  
Vol 01 (03) ◽  
pp. 203-210 ◽  
Author(s):  
T. MUTA ◽  
R. NAJIMA ◽  
S. WAKAIZUMI
Keyword(s):  
Cross Section ◽  
W Boson ◽  
Precise Determination ◽  
Boson Mass ◽  
Finite Width ◽  
Threshold Region ◽  
Width Effect ◽  
Higher Order Corrections ◽  
Proper Account

The total cross section for the process e+e−→W+W− followed by subsequent W-boson decays is calculated in the tree approximation by taking proper account of the W-boson width. It is found that the cross section is considerably modified by the finite-width effect in the threshold region, thus affecting the precise determination of the W-boson mass by experimental data. The effect of higher-order corrections is also considered.

scholarly journals Assessment of the Depth of the Deformed Layer in the Roller Burnishing Process

2018 ◽  
Vol 50 (3) ◽  
pp. 493-503 ◽  
Author(s):  
M. Kowalik ◽  
T. Mazur ◽  
T. Trzepiecinski
Keyword(s):  
Roller Burnishing ◽  
Burnishing Process ◽  
Deformed Layer
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