Effect of surface characterization induced by fine shot peening on scuffing of steel roller

2019 ◽  
pp. 37-46
Author(s):  
Y. Omiya ◽  
M. Fujii ◽  
H. Sekishita ◽  
K. Ishimoto ◽  
A. Ueda
Keyword(s):  
Shot Peening ◽  
Surface Characterization ◽  
Steel Roller ◽  
Effect Of Surface

Fatigue of Unmachined Aluminium Alloy Extrusions

1962 ◽  
Vol 13 (3) ◽  
pp. 271-274 ◽  
Author(s):  
K. W. Gunn ◽  
A. R. Woodward
Keyword(s):  
Laboratory Test ◽  
Aluminium Alloy ◽  
Shot Peening ◽  
Copper Alloys ◽  
High Strength ◽  
Fatigue Properties ◽  
Test Pieces ◽  
Compressive Stresses ◽  
Aluminium Copper ◽  
Effect Of Surface

SummaryThe fatigue properties of unmachined extrusions of high-strength aluminium-copper alloys are known to be lower than those of conventional fully-machined test pieces. Work described in this note has shown that the removal of a layer of metal 0·025 in. thick from the surface of B.S. L65-type extrusions results in an increase in fatigue properties to values approaching those obtained from the conventional laboratory test pieces. Because the removal of material from the surface is not always a practical proposition, other methods of improving strength have been examined and the effect of surface compressive stresses has been shown to be beneficial. Sufficient compressive stress can be induced by surface-rolling to increase the fatigue properties to those of conventional specimens, but this method can only be easily applied to round sections and it is suggested that shot-peening or vapour-blasting could be used for more complicated sections.

Effects of surface treatments on changes in low-voltage SEM of polymers

1991 ◽  
Vol 49 ◽  
pp. 1038-1039
Author(s):  
J. Chang ◽  
S. Krause ◽  
W. Adams
Keyword(s):  
Surface Treatment ◽  
Photoelectron Spectroscopy ◽  
Surface Characterization ◽  
Low Voltage ◽  
Beam Current ◽  
Polymer Surfaces ◽  
Powder Sintering ◽  
Good Potential ◽  
Effect Of Surface ◽  
Surface Changes

The effects of surface treatment of polymers is important in many areas of technology. Polymer surfaces may be treated for a variety of reasons including: increased wettability for printing; improved fiber bonding in composites; and improved bonding in powder sintering. A variety of techniques are used to study surface changes after treatments including hydrophobicity, X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM). Another technique which has good potential for surface characterization is the effect of surface treatment on the crossover voltage, “E2,” in low voltage SEM. E2 is the accelerating voltage at which there is 0 potential on surface of an insulator because the electron emission current is equal to the primary beam current. We have previously demonstrated that changes in E2 are correlated to changes in hydrophobicity. These results also correlated well with XPS and weight loss measurements. In this research we are reporting on the effects of surface roughness, chemical treatment and electrical discharges on changes in E2 for teflon (polytetrafluoroethylene).

Effect of surface roughness on steel roller scuffing

Wear ◽  
1995 ◽  
Vol 184 (2) ◽  
pp. 203-212 ◽  
Author(s):  
Jeng Haur Horng ◽  
Jen Fin Lin ◽  
Ke Yang Li
Keyword(s):  
Surface Roughness ◽  
Steel Roller ◽  
Effect Of Surface

The Effect of Surface Over-Aging on the Strength and SCC Susceptibility of 7075 Aluminum Alloy

2009 ◽  
Author(s):  
Hamidreza Fooladfar ◽  
Babak Hashemi ◽  
Mousa Younesi
Keyword(s):  
Mechanical Properties ◽  
Heat Treatment ◽  
Shot Peening ◽  
High Strength ◽  
7075 Aluminum Alloy ◽  
Treatment Procedure ◽  
Aging Period ◽  
Two Stages ◽  
Heat Treatment Procedure ◽  
Effect Of Surface

A novel heat treatment procedure combining the shot-peening with a two-step aging operation was proposed to improve both the strength and the stress corrosion cracking (SCC) resistance of the high-strength 7075 aluminium alloy. The heat treatment included one shot-peening stage before or between the two stages of aging at 120°C for 24 h and at 160°C for 1 h, respectively. The mechanical properties obtained during the aforementioned operations were extremely similar to those of the T6 sample owing to the unaffected bulk microstructure over such a low over-aging period. The SCC resistance of these samples was considerably improved, compared to that of the T6 sample and of the conventional shot-peened T6 sample due to the over-aging of the surface like the T7 treatment leading from the diffusion acceleration by the dislocations generated in the surface layer during shot-peening. In spite of the further depth of deformation caused by shot-peening prior to the first step of aging, the sample shot-peened after the first step of aging showed no significant decrease in the SCC resistance because of its higher generated dislocation by shot-peening.

305 Effect of Surface Properties on Fatigue Life of Cavitation-Peened Steel Roller

2015 ◽  
Vol 2015.53 (0) ◽  
pp. _305-1_-_305-2_
Author(s):  
Yuta NAGAHASHI ◽  
Masanori SEKI ◽  
Hitoshi SOYAMA ◽  
Masahiro FUJII
Keyword(s):  
Fatigue Life ◽  
Surface Properties ◽  
Steel Roller ◽  
Effect Of Surface
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