Study of wear performance and tribological characterization of AlTiN PVD coatings with different Al/Ti ratios during ultra-high speed turning of stainless steel 304

2021 ◽  
Vol 96 ◽  
pp. 105488
Author(s):  
Qianxi He ◽  
Jose M. DePaiva ◽  
Joern Kohlscheen ◽  
Ben D. Beake ◽  
Stephen C. Veldhuis
Keyword(s):  
Stainless Steel ◽  
High Speed ◽  
Pvd Coatings ◽  
Wear Performance ◽  
High Speed Turning ◽  
Ultra High Speed ◽  
Stainless Steel 304 ◽  
Tribological Characterization

Topographical and tribological characterization of some ceramic and stainless steel brackets

2016 ◽  
Vol 58 (7-8) ◽  
pp. 608-611
Author(s):  
Violeta Merie ◽  
Viorica Ţărmure ◽  
Simion Haragâş ◽  
Andreea Pop
Keyword(s):  
Stainless Steel ◽  
Tribological Characterization

Characterization of ultra-high-speed pseudomorphic AlGaAs/InGaAs (on GaAs) MODFETs

1989 ◽  
Vol 36 (10) ◽  
pp. 2243-2248 ◽  
Author(s):  
L.D. Nguyen ◽  
P.J. Tasker ◽  
D.C. Radulescu ◽  
L.F. Eastman
Keyword(s):  
High Speed ◽  
Ultra High Speed

Tribological Characterization of Machining at Very Small Contact Areas

2009 ◽  
Vol 131 (4) ◽  
Author(s):  
Michael R. Lovell ◽  
P. Cohen ◽  
Pradeep L. Menezes ◽  
R. Shankar
Keyword(s):  
High Speed ◽  
Friction Mechanisms ◽  
High Speed Steel ◽  
Small Scale ◽  
Machining Processes ◽  
Macroscopic Theory ◽  
Contact Areas ◽  
Tribological Characterization ◽  
Physical Phenomena

When machining miniaturized components, the contact conditions between the tool and the workpiece exhibit very small contact areas that are on the order of 10−5 mm2. Under these conditions, extremely high contact stresses are generated, and it is not clear whether macroscopic theories for the chip formation, cutting forces, and friction mechanisms are applicable. For this reason, the present investigation has focused on creating a basic understanding of the frictional behavior in very small scale machining processes so that evaluations of standard macroscale models could be performed. Specialized machining experiments were conducted on 70/30 brass materials using high-speed steel tools over a range of speeds, feeds, depths of cut, and tool rake angles. At each operating condition studied, the friction coefficient and the shear factor τk were obtained. Based on the experimental results, it was determined that the standard macroscopic theory for analyzing detailed friction mechanisms was insufficient in very small scale machining processes. An approach that utilized the shear factor, in contrast, was found to be better for decoupling the physical phenomena involved. Utilizing the shear factor as an analysis parameter, the parameters that significantly influence the friction in microscale machining processes were ascertained and discussed.

Thermal Spraying Applied Onto High Energy Railway Braking: Characterization of Friction Performances

1998 ◽  
Author(s):  
H. Bartys ◽  
J.D. Guerin ◽  
J.P. Bricout ◽  
J. Oudin
Keyword(s):  
High Speed ◽  
Wear Behavior ◽  
Energy Levels ◽  
Thermal Spraying ◽  
High Energy ◽  
Coated Steel ◽  
High Speed Trains ◽  
To Come ◽  
Tribological Characterization

Abstract Optimization of constitutive friction materials of braking devices for high speed trains is endlessly on delicate increase by reason of the large energy levels to dissipate, and the lightening more and more required by generations to come. Low thermal diffusivity materials such as coated steel discs in one of the research themes in this field. Proposed study is relative to tribological characterization of the wear behavior of stellite coatings, based on cobalt or nickel alloys against aluminum titanate pad. This one has ever been tested and prooved good behavior against cermet coated steel discs. Stellite coating performances are evaluated in term of friction coefficient, contact temperature and wear in comparison with this type of disc.

Tribological characterization of diamond-like carbon films on nonledeburitic high-speed steels

2000 ◽  
Vol 45 (3) ◽  
pp. 233-239 ◽  
Author(s):  
J Richter ◽  
I.M Hutchings ◽  
T.W Clyne ◽  
D.N Allsopp ◽  
X Peng
Keyword(s):  
High Speed ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Tribological Characterization
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