Determination of wear resistance and wear mechanisms of HVAF coat-ings based on Ni-Al composition depending on the technological modes of their deposition

Here we developed a hot-pressed molded resin-based brake pad material reinforced by a nano sodium titanate whisker in comparison with nano potassium titanate whisker. The effect of the whiskers on the tribology behavior was investigated. Though nano sodium titanate whisker reinforced brake material showed higher porosity (+12.29% averagely) and lower hardness (-25.8% averagely) caused by the impurities, it exhibited improved ability in stabilizing the friction coefficient and enhancing 25.5%, 31.1%, 25.9% higher wear resistance, when the volume contents of whisker are 7.5%, 15% and 22.5%, respectively, compared to the nano potassium titanate whisker reinforced brake material. The wear mechanisms of the nano sodium titanate whisker reinforced brake materials were determined as embedded debris, delaminated crater, moderate layers transfer, uniform furrows, primary plateaus and secondary plateaus in similar size, indicating a main wear form of abrasive wear instead of adhesive wear.

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A new approach for detection of wear mechanisms and determination of tool life in turning using acoustic emission

Tribology International ◽

10.1016/j.triboint.2015.07.024 ◽

2015 ◽

Vol 92 ◽

pp. 519-532 ◽

Cited By ~ 41

Author(s):

Luis Henrique Andrade Maia ◽

Alexandre Mendes Abrao ◽

Wander Luiz Vasconcelos ◽

Wisley Falco Sales ◽

Alisson Rocha Machado

Keyword(s):

Acoustic Emission ◽

Tool Life ◽

Wear Mechanisms ◽

New Approach

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AN ANALYSYS OF WEAR AND MECHANICAL AND TRIBOLOGICAL PROPERTIES OF HIGH-MANGANESE CAST STEEL HARDENED BY DIFFERENT METHODS

Tribologia ◽

10.5604/01.3001.0012.7554 ◽

2018 ◽

Vol 280 (4) ◽

pp. 137-142

Author(s):

Dagmara TRYBA ◽

Marcin KOT ◽

Anna ANTOSZ

Keyword(s):

Wear Resistance ◽

Coefficient Of Friction ◽

Tribological Properties ◽

Cast Steel ◽

Base Material ◽

High Manganese ◽

Dynamic Impact ◽

Mechanical And Tribological Properties ◽

Alternative Method

Properties of high manganese austenitic cast steel are not satisfactory; therefore, this material should be hardened. Currently, the commonly used method of hardening does not allow eliminating problems related to premature wear of railway frogs. Therefore, many studies have been carried out to find an alternative method to obtain improved wear resistance of such elements. The article presents an analysis of the mechanical and tribological properties of base and hardened, by different methods, high-manganese cast steel applied for turnouts. Tests were performed for three hardening methods: explosive, pressure-rolling, and dynamic impact. The results were compared with the properties of base material after saturation treatment. The conducted tests allowed the determination of hardness profiles of hardened surfaces, as well as the wear resistance and coefficient of friction, and the obtained results are very promising. Hardening by dynamic impact provided much better results in relation to presently used explosive hardening technology.

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A Comparison of the Tribo-Mechanical Properties of a Wear Resistant Cobalt-Based Alloy Produced by Different Manufacturing Processes

Journal of Tribology ◽

10.1115/1.2736450 ◽

2007 ◽

Vol 129 (3) ◽

pp. 586-594 ◽

Cited By ~ 21

Author(s):

H. Yu ◽

R. Ahmed ◽

H. de Villiers Lovelock

Keyword(s):

Mechanical Properties ◽

Wear Resistance ◽

Wear Mechanisms ◽

Sliding Wear ◽

Mechanical Performance ◽

Cast Alloy ◽

Processing Route ◽

Structure Property ◽

Wear Resistant ◽

The Impact

This paper aims to compare the tribo-mechanical properties and structure–property relationships of a wear resistant cobalt-based alloy produced via two different manufacturing routes, namely sand casting and powder consolidation by hot isostatic pressing (HIPing). The alloy had a nominal wt % composition of Co–33Cr–17.5W–2.5C, which is similar to the composition of commercially available Stellite 20 alloy. The high tungsten and carbon contents provide resistance to severe abrasive and sliding wear. However, the coarse carbide structure of the cast alloy also gives rise to brittleness. Hence this research was conducted to comprehend if the carbide refinement and corresponding changes in the microstructure, caused by changing the processing route to HIPing, could provide additional merits in the tribo-mechanical performance of this alloy. The HIPed alloy possessed a much finer microstructure than the cast alloy. Both alloys had similar hardness, but the impact resistance of the HIPed alloy was an order of magnitude higher than the cast counterpart. Despite similar abrasive and sliding wear resistance of both alloys, their main wear mechanisms were different due to their different carbide morphologies. Brittle fracture of the carbides and ploughing of the matrix were the main wear mechanisms for the cast alloy, whereas ploughing and carbide pullout were the dominant wear mechanisms for the HIPed alloy. The HIPed alloy showed significant improvement in contact fatigue performance, indicating its superior impact and fatigue resistance without compromising the hardness and sliding∕abrasive wear resistance, which makes it suitable for relatively higher stress applications.

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Determination of the heat-treatment cycle for 110G13L steel for increasing the abrasive wear resistance

Metal Science and Heat Treatment ◽

10.1007/bf00699364 ◽

1985 ◽

Vol 27 (8) ◽

pp. 621-624

Author(s):

S. E. Kondratyuk ◽

G. G. Lutsenko

Keyword(s):

Heat Treatment ◽

Wear Resistance ◽

Abrasive Wear ◽

Treatment Cycle ◽

Abrasive Wear Resistance ◽

Heat Treatment Cycle ◽

110G13l Steel

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Experimental Determination of Mechanical Characteristics of Four Types of Stones and their Influence on the Construction Machinery Parts Wear

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1100.178 ◽

2015 ◽

Vol 1100 ◽

pp. 178-184

Author(s):

Vukić Lazić ◽

Dušan Arsić ◽

Ružica R. Nikolić ◽

Branislav Hadzima ◽

Milan Mutavdžić

Keyword(s):

Wear Resistance ◽

Experimental Determination ◽

Mechanical Characteristics ◽

Building Stones ◽

Construction Machinery ◽

Dolomite Marble ◽

Different Types

In this paper were experimentally determined properties of four different types of stones and stone aggregates and they were compared to each other with respect to their influence on wear of working parts of machines for preparation and deposition of stones on roads. Rocks, the building stones are obtained from, consist of various types of minerals, namely of physically and chemically homogeneous rocks created within the Earths crust. Here are considered four, most important types of building stones: limestone, dolomite marble, calcite-dolomite marble and andesite. They are being exploited from four sites in Serbia, and they are convenient for deposition of certain layers of the carriageway on roads, streets, airports and foundations on railways, as well as for making different kinds of concrete and asphalt. In the paper are presented results of mineralogical-petrographic, physical-mechanical and special investigations. Wear resistance was also checked on certain samples.

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THE USE OF PULSE MODULATION AS A WAY TO IMPROVE THE STRENGTH CHARACTERISTICS OF PLASMA COATINGS

10.34220/itrt2021_74-76 ◽

2021 ◽

Author(s):

A.M. Kadirmetov ◽

◽

V.N. Bukhtoyarov ◽

V.A. Ivannikov ◽

◽

...

Keyword(s):

Wear Resistance ◽

Strength Properties ◽

Strength Characteristics ◽

Plasma Process ◽

Electrical Parameters ◽

Pulse Modulation ◽

Coat Ings ◽

Machine Parts ◽

Plasma Coatings

Currently, much attention is paid to improving the wear resistance of the sur-face of machine parts. It is possible to improve the quality of surfaces with the use of plasma coat-ings. However, these coatings do not always provide the necessary strength properties. The article considers one of the ways to improve the strength characteristics – the modulation of the electrical parameters of the plasma process.

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