Effects of Dynamic Loading under Extreme Conditions on Wear Resistance of T105Mn120 Castings for Railway Safety Systems

2021 ◽  
Author(s):  
V. Bulbuc ◽  
V. Paleu ◽  
B. Pricop ◽  
M. Popa ◽  
V. Cârlescu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Dynamic Loading ◽  
Extreme Conditions ◽  
Railway Safety ◽  
Safety Systems

Variation of damping behaviour of T105Mn120 castings, used for railway safety systems, as an effect of extreme loading conditions

2019 ◽  
Vol 19 ◽  
pp. 949-955
Author(s):  
Vasile Bulbuc ◽  
Bogdan Pricop ◽  
Florin Maxim ◽  
Mihai Popa ◽  
Nicanor Cimpoesu ◽  
...  
Keyword(s):  
Loading Conditions ◽  
Railway Safety ◽  
Safety Systems

DURATECH XTREME

Alloy Digest ◽  
2008 ◽  
Vol 57 (4) ◽  
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Heat Treating ◽  
High Impact ◽  
Extreme Conditions ◽  
Powder Metal ◽  
Steel Company ◽  
Specialty Steel ◽  
Very High ◽  
Hot Hardness

Abstract DuraTech Xtreme has very high impact toughness, high hot hardness, and good wear resistance. As indicated in the name, the alloy is intended for use in extreme” conditions. This datasheet provides information on composition, physical properties, hardness, and elasticity as well as fracture toughness. It also includes information on wear resistance as well as heat treating, machining, and powder metal forms. Filing Code: TS-663. Producer or source: Latrobe Specialty Steel Company.

Construction of Hammer for Sugarcane Shredder

2013 ◽  
Vol 811 ◽  
pp. 308-313 ◽  
Author(s):  
Pavel Podany ◽  
Jan Džugan ◽  
Josef Vacik
Keyword(s):  
Wear Resistance ◽  
Chemical Analysis ◽  
Dynamic Loading ◽  
High Speed ◽  
Impact Testing ◽  
Sugar Production ◽  
Weld Deposit ◽  
High Speed Impact ◽  
Microstructure Evaluation ◽  
Pin On Disc

Article deals with construction of hammer for cane shredder. Function of hammer in shredder consists in crushing sugarcane stalks for further processing in sugar production. Hammer loading and other calculations were made. Four weld deposit materials were suggested for protection of hammer against wear and dynamic loading. All samples with weld deposit were subjected to microstructure evaluation, chemical analysis, high speed impact testing and tribological PIN-on-DISC test for estimation of wear resistance. One weld deposit material was recommended as a result of these tests.

Study on Laser Cladding Coatings of Ni-Based Alloy/TiC/Nickel-Coated Graphite on Steel Substrate

2010 ◽  
Vol 450 ◽  
pp. 214-218 ◽  
Author(s):  
Li Xia Ying ◽  
Li Dong Jiang ◽  
Fan Kai Kong ◽  
En Xia Yang
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Laser Cladding ◽  
Metal Surfaces ◽  
Steel Substrate ◽  
Extreme Conditions ◽  
Cross Sectional ◽  
Graphite Composite ◽  
Forming Mechanism ◽  
Uniform Microstructure

In order to improve the antiwear and antifriction performances of tribological metal surfaces for the extreme conditions, the composite coating has been fabricated on metal surfaces by the technology of laser cladding. In the experiment, Ni-based alloy, TiC and Nickel-coated graphite are used as the main ingredients of composite. The cross-sectional macrographs, microstructure, compositions, microhardness, tribological properties and the forming mechanism of the coating was tested and analyzed. Results show that laser cladding Ni60A/TiC/Nickel-coated graphite composite can obtain excellent coating with fully compact and uniform microstructure, and good interface with the substrate. The microhardness of the clad coating is over HV1000, which is five times higher than that of the steel substrate. The friction coefficient is reduced to about 0.4-0.5 in comparison with that of the steel substrate (about 0.7-0.8). At the same time, the wear resistance of the clad coating is also improved greatly.

Results of research on wear resistance of structural materials

2020 ◽  
pp. 172-178
Author(s):  
Н.Г. Серёгин ◽  
В.Г. Исаев
Keyword(s):  
Mathematical Model ◽  
Wear Resistance ◽  
Dynamic Loading ◽  
Static Loading ◽  
Friction Pair ◽  
Structural Materials ◽  
Comparative Tests ◽  
Experimental Installation ◽  
Dynamic Wear

Описана конструкция экспериментальной установки для проведения сравнительных испытаний износостойкости различных пар трения конструкционных материалов. Представлены результаты сравнительных испытаний износостойкости двух пар трения при статическом нагружении и определена лучшая из них. Приведены результаты испытаний износостойкости лучшей пары трения при динамическом нагружении. Разработана математическая модель динамического изнашивания лучшей пары трения конструкционных материалов. The design of an experimental installation for conducting comparative tests of the wear resistance of various friction pairs of structural materials is described. The results of comparative tests of the wear resistance of two friction pairs under static loading are presented and the best of them is determined. The results of tests of the wear resistance of the best friction pair under dynamic loading are presented. A mathematical model of dynamic wear of the best friction pair of structural materials is developed.

scholarly journals Оn wear resistance of steel-containing composites under extreme friction conditions

2019 ◽  
Vol 62 (8) ◽  
pp. 621-626
Author(s):  
V. V. Fadin ◽  
A. V. Kolubaev ◽  
M. I. Aleutdinova
Keyword(s):  
Plastic Deformation ◽  
Wear Resistance ◽  
Surface Layer ◽  
Solid Solutions ◽  
High Wear Resistance ◽  
Dry Sliding ◽  
Extreme Conditions ◽  
Surface Layers ◽  
Strong Adhesion ◽  
Low Wear

The interrelation between the mechanisms of surface layer deterioration of powder composites and the elemental compositions of their primary structures under extreme conditions of friction was studied. Extreme conditions were set by sliding under high pressure (higher 100 MPa) in boundary lubrication or by dry sliding under high density electric current (higher 100 A/cm2). It caused plastic deformation of the surface layers and their deterioration due to lowcycle fatigue. High wear resistance of materials in such conditions should be achieved due to satisfactory stress relaxation in the surface layers. It was suggested that stresses should be relaxed due to local plastic deformation in vicinity of the emerging stress concentrators. The ease of plastic deformation (and ease of relaxation) should be ensured by reducing the doping of the composites structural components, i.e. due to the lack of solid solutions. It was shown that the composites having the Cu – steel (alloy) – TiC compositions obtained by the method of self-propagating high-temperature synthesis with simultaneous pressing of the burning charge had strong adhesion in the sliding contact and showed low wear resistance under high pressures boundary friction. The absence of solid solutions in the primary structure of the Cu – Fe – TiC composite corresponded to high wear resistance due to the absence of adhesion in the contact and easy stress relaxation. Composites of Cu – steel-graphite compounds, made by sintering in vacuum, showed strong adhesion in a dry sliding electrical contact and low wear resistance due to the high content of alloying elements. It was noted that the absence of solutions in the composite composition of Cu – Fe – graphite caused the absence of adhesion in contact and the corresponding high wear resistance. In addition, stresses in the surface layer were also relaxed by the formation of FeO oxide in the contact space during sliding with the current collector. Composites containing solid solutions were not capable of forming FeO oxide on the sliding surface. It was an additional reason for the low wear resistance realization. It was noted that solid solutions caused a decrease in the thermal conductivity of the surface layer. Therefore, it led to an increase in temperature gradients on the sliding surface and to a сorresponding acceleration of the friction zone deterioration.

Application of TEM to Deformation, Wear, and Fracture of Ceramics

1974 ◽  
Vol 32 ◽  
pp. 472-473
Author(s):  
B. J. Hockey
Keyword(s):  
Wear Resistance ◽  
High Temperature ◽  
Mechanical Behavior ◽  
Brittle Materials ◽  
High Temperature Strength ◽  
Wide Range ◽  
Corrosive Environments ◽  
Further Development

Ceramics, such as Al2O3 and SiC have numerous current and potential uses in applications where high temperature strength, hardness, and wear resistance are required often in corrosive environments. These materials are, however, highly anisotropic and brittle, so that their mechanical behavior is often unpredictable. The further development of these materials will require a better understanding of the basic mechanisms controlling deformation, wear, and fracture.The purpose of this talk is to describe applications of TEM to the study of the deformation, wear, and fracture of Al2O3. Similar studies are currently being conducted on SiC and the techniques involved should be applicable to a wide range of hard, brittle materials.

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