Results 41 to 50 of about 24,069 (204)

Oil film measurement in polytetrafluoroethylene-faced thrust pad bearings for hydrogenerator applications [PDF]

open access: yes, 2006
There is a growing trend in the replacement of the babbit facing in thrust pad bearings with a composite polytetrafluoroethylene (PTFE) surface layer. The PTFE-faced bearings have been shown to allow a greater specific pressure, reduce thermal crowning ...
Drinkwater, B.W.   +3 more
core   +1 more source

Laser-induced ultrasound imaging of multi metal laminate with complex interface

open access: yesMaterials & Design, 2023
The corrugated rolling process is a new type of metal clad plate production method, and the high-precision testing of the corrugated interface is of great significance to the improvement of product quality.
Yanjie Zhang   +8 more
doaj   +1 more source

Residual Stress in Wheels: Comparison of Neutron Diffraction and Ultrasonic Methods, with Trends in RCF [PDF]

open access: yes, 2014
The critical damage mechanism on many GB passenger train wheels is Rolling Contact Fatigue (RCF) cracking in the rim. Evidence from field observations suggests that RCF damage occurs much more quickly as the wheelsets near the end of their life.
Bevan, Adam   +3 more
core  

Ultrasonic roll bite measurements in cold rolling: Contact length and strip thickness [PDF]

open access: yes, 2017
In cold rolling of thin metal strip, contact conditions between the work rolls and the strip are of great importance: roll deformations and their effect on strip thickness variation may lead to strip flatness defects and thickness inhomogeneity.
Boman, R.   +6 more
core   +1 more source

Effects of ultrasonic surface rolling process on tribological behavior of 4Cr13 stainless steel [PDF]

open access: yes, 2022
Abstract Ultrasonic surface rolling (USR) process is a novel surface strengthening technique based on the tool head's high-frequency impact on the workpiece. USR can cause severe plastic deformation on the superficial surface of metal material, and greatly improving the mechanical properties of the material. This paper elucidates the effects of
Xiaoshuang Luo   +6 more
openaire   +1 more source

Effect of Ultrasonic Rolling on Surface Properties of GCr15 Spherical Joint Bearing

open access: yesLubricants
Ultrasonic surface rolling process (USRP) has the potential to improve the surface mechanical properties of metal components with platelike or cylindrical macrostructure, but its effect on spherical surfaces remains to be studied in depth.
Hao Zhang   +4 more
doaj   +1 more source

Mechanical and Corrosion Behavior of a Composite Gradient-Structured Cu-Fe Alloy

open access: yesMetals, 2023
Immiscible Cu-Fe alloys exhibit poor corrosion resistance due to different corrosion potentials between the constituent phases, which limits their application.
Bo Guan   +9 more
doaj   +1 more source

Visualization of defects images during manual ultrasonic inspection of parts and units of the railway rolling stock

open access: yesВестник Научно-исследовательского института железнодорожного транспорта, 2017
The article suggests a method for visualizing internal defects of parts and units of rolling stock, which is performed by representing defects images on type B and C scans in automated and mechanized ultrasonic testing systems.
A. N. Kireev
doaj   +1 more source

Study on Ultrasonic Rolling Enhancement of TC4 and Its Tribological Characteristics Under Seawater Lubrication

open access: yesLubricants
To enhance the abrasion resistance of TC4 titanium alloy and meet the demand for wear-resistant and corrosion-resistant friction pair materials for water-hydraulic components of marine equipment, the tribological properties of the material subsequent to ...
Shuaihui Wang   +6 more
doaj   +1 more source

Influence of Ultrasonic Surface Rolling Process and Shot Peening on Fretting Fatigue Performance of Ti-6Al-4V

open access: yesChinese Journal of Mechanical Engineering, 2021
At present, there are many studies on the residual stress field and plastic strain field introduced by surface strengthening, which can well hinder the initiation of early fatigue cracks and delay the propagation of fatigue cracks. However, there are few
Ning Wang   +5 more
doaj   +1 more source

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