Dependence of the friction coefficient and wear resistance of copper-bearing modified cast irons on their mechanical properties

1967 ◽  
Vol 2 (2) ◽  
pp. 155-158 ◽  
Author(s):  
I. P. Vygovskii ◽  
K. P. Tabinskii
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Cast Irons

scholarly journals Corrosion and Mechanical Properties of the Fe-W-Wo2 and Fe-Mo-MoO2 Nanocomposites

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Gulmira Yar-Mukhamedova ◽  
Maryna Ved’ ◽  
Nikolay Sakhnenko ◽  
Ann Karakurkchi ◽  
Iryna Yermolenko
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Cast Iron ◽  
Friction Coefficient ◽  
Metal Surface ◽  
Refractory Metals ◽  
Iron Matrix ◽  
Cast Irons ◽  
New Approach ◽  
Surface Protection

Analyzing of composition electrolytic coatings’ application for the metal surface protection is considered. It is established that using different components for coatings’ modification gives possibility to obtain surfaces with expanding exploitation properties, in particular, with improved wearing and anticorrosion resistance. The new approach for protecting details which are made from cast irons by obtaining two kinds of composition coatings from binary alloys iron-molybdenum and iron-tungsten is proposed. It is found that the modification of iron by refractory metals up to 37 wt. % leads to a noticeable change in the microstructure of the coatings’ surface. It is established that the incorporation of refractory metals into the iron matrix is a good way to increase the microhardness of the surface by 2.5–3.5 times and rising of the wear resistance by 40%, as well as decreasing the friction coefficient by 3-4 times in comparison with the cast iron substrate. The research results can be used for surfaces hardening and protection in different industries.

Investigations on tribological behaviour of AA7075-TiO2 composites under dry sliding conditions

2019 ◽  
Vol 71 (9) ◽  
pp. 1064-1071 ◽  
Author(s):  
Alagarsamy S.V. ◽  
Ravichandran M.
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Rate ◽  
Applied Load ◽  
Weight Ratio ◽  
Specific Wear Rate ◽  
Dry Sliding ◽  
Matrix Composites ◽  
Content Type

Purpose Aluminium and its alloys are the most preferred material in aerospace and automotive industries because of their high strength-to-weight ratio. However, these alloys are found to be low wear resistance. Hence, the incorporation of ceramic particles with the aluminium alloy may be enhanced the mechanical and tribological properties. The purpose of this study is to optimize the specific wear rate and friction coefficient of titanium dioxide (TiO2) reinforced AA7075 matrix composites. The four wear control factors are considered, i.e. reinforcement (Wt.%), applied load (N), sliding velocity (m/s) and sliding distance (m). Design/methodology/approach The composites were fabricated through stir casting route with varying weight percentages (0, 5, 10 and 15 Wt.%) of TiO2 particulates. The mechanical properties of the composites were studied. The specific wear rate and friction coefficient of the newly prepared composites was determined by using a pin-on-disc apparatus under dry sliding conditions. Experiments were planned as per Taguchi’s L16 orthogonal design. Signal-to-noise ratio analysis was used to find the optimal combination of parameters. Findings The mechanical properties such as yield strength, tensile strength and hardness of the composites significantly improved with the addition of TiO2 particles. The analysis of variance result shows that the applied load and reinforcement Wt.% are the most influencing parameters on specific wear rate and friction coefficient during dry sliding conditions. The scanning electron microscope morphology of the worn surface shows that TiO2 particles protect the matrix from more removal of material at all conditions. Originality/value This paper provides a solution for optimal parameters on specific wear rate and friction coefficient of aluminium matrix composites (AMCs) using Taguchi methodology. The obtained results are useful in improving the wear resistance of the AA7075-TiO2 composites.

Tribological behavior of CrN coating on aluminum alloys deposited by arc ion plating

2002 ◽  
Vol 17 (12) ◽  
pp. 3133-3138 ◽  
Author(s):  
Fei Zhou ◽  
Chang-Min Suh ◽  
Seock-Sam Kim ◽  
Ri-Ichi Murakami
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Normal Load ◽  
Dry Sliding Wear ◽  
Wear Volume ◽  
Arc Ion Plating ◽  
Crn Coating ◽  
Ion Plating ◽  
Wear And Friction

Dry sliding wear and friction tests of CrN coating on two types of aluminum alloy substrates, 6061 Al and 7075 Al, deposited by arc ion plating were performed with a ball-on-disk tribometer. The effects of normal load and the mechanical properties of the substrate on the friction coefficient and wear resistance of CrN coating were investigated. The worn surfaces were observed by scanning electron microscopy. The results show that surface microhardness of CrN-coated 7075 Al is higher than that of CrN-coated 6061 Al. With an increase in normal load, wear volume increases, while the friction coefficient decreases. The friction coefficient of CrN-coated 6061 Al is higher than that of CrN-coated 7075 Al, while the wear resistance of CrN-coated 6061 Al is lower than that of the CrN-coated 7075 Al. This indicates that the substrate mechanical properties have strong influence on the friction coefficient and wear of CrN coating. The main wear mechanism was fragments of CrN coating, caused by apparent plastic deformation of substrate during wear tests.

Cryogenic Treatment of 06Cr19Ni10 Austenitic Stainless Steel

2013 ◽  
Vol 749 ◽  
pp. 187-191 ◽  
Author(s):  
Hong Zhang ◽  
Kai Xuan Gu ◽  
Jia Guo ◽  
Xiao Dai Xue ◽  
Jun Jie Wang
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Austenitic Stainless Steel ◽  
Room Temperature ◽  
Treatment Process ◽  
Cryogenic Treatment

The effect of cryogenic treatment on mechanical properties and wear resistance at room temperature of 06Cr19Ni10 austenitic stainless steel was studied in the present study. The cryogenic treatment process was carried out at-160 and different time in program-controlled cryogenic container. The results showed that, after cryogenic treatment, the room-temperature mechanical properties of the 06Cr19Ni10 steel remained stable without embrittlement, friction coefficient of the 06Cr19Ni10 steel decreased and the wear resistance improved after cryogenic treatment. When cryogenic treatment was treated at-160 for two hours and thirty minutes, the friction coefficient of the 06Cr19Ni10 steel was the smallest and wear resistance was the best.

scholarly journals Structural and Mechanical Properties of a-BCN Films Prepared by an Arc-Sputtering Hybrid Process

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 719
Author(s):  
Yuki Hirata ◽  
Ryotaro Takeuchi ◽  
Hiroyuki Taniguchi ◽  
Masao Kawagoe ◽  
Yoshinao Iwamoto ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Carbon Content ◽  
Photoelectron Spectroscopy ◽  
High Hardness ◽  
Film Structure ◽  
Hybrid Process ◽  
High Wear Resistance ◽  
Wear Volume

Amorphous boron carbon nitride (a-BCN) films exhibit excellent properties such as high hardness and high wear resistance. However, the correlation between the film structure and its mechanical properties is not fully understood. In this study, a-BCN films were prepared by an arc-sputtering hybrid process under various coating conditions, and the correlations between the film’s structure and mechanical properties were clarified. Glow discharge optical emission spectroscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and Raman spectroscopy were used to analyze the structural properties and chemical composition. Nanoindentation and ball-on-disc tests were performed to evaluate the hardness and to estimate the friction coefficient and wear volume, respectively. The results indicated that the mechanical properties strongly depend on the carbon content in the film; it decreases significantly when the carbon content is <90%. On the other hand, by controlling the contents of boron and nitrogen to a very small amount (up to 2.5 at.%), it is possible to synthesize a film that has nearly the same hardness and friction coefficient as those of an amorphous carbon (a-C) film and better wear resistance than the a-C film.

The Influence of Modified Polytetrafluoroethylene(PTFE) on the Properties of PA6/PTFE Blends

2014 ◽  
Vol 662 ◽  
pp. 38-45 ◽  
Author(s):  
Juan Liu ◽  
Heng Lin ◽  
Hong Ling Yi ◽  
Ting Wei ◽  
Bai Cun Zheng
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Chemical Stability ◽  
Dry Friction ◽  
Good Strength ◽  
Engineering Materials ◽  
Strength And Stiffness

Polyamide, is engineering materials, has been widely used due to their high mechanical properties and good chemical stability although their moisture absorbtion can cause problems. In recent years, polyamides have been used as wear resistance materials due to their self-lubricating characteristics as well as good strength and stiffness [1]. However the high dry friction coefficient of polyamides restricts their application. Thus, modifying polyamides to improve the abrasion resistant property is desirable.

The Influence of Hydrostatic Extrusion on the Properties of an Austenitic Stainless Steel

2006 ◽  
Vol 114 ◽  
pp. 57-62 ◽  
Author(s):  
Julia Budniak ◽  
Małgorzata Lewandowska ◽  
Wacław Pachla ◽  
Mariusz Kulczyk ◽  
Krzysztof Jan Kurzydlowski
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Wear Test ◽  
Extrusion Process ◽  
Hydrostatic Extrusion ◽  
Compression Tests ◽  
Wear Properties ◽  
Pin On Disc

The paper presents the results of investigations into the mechanical properties and tribological characteristics of 316 LVM processed by hydrostatic extrusion (HE). The mechanical properties were characterized by microhardness measurements and compression tests. The wear properties were investigated using a pin-on-disc tribometer under dry and lubricated conditions. The friction coefficient was measured as a function of the time of the wear test. The results indicate that the hydrostatic extrusion process significantly improves the mechanical properties and the wear resistance of 316 LVM stainless steel. The results are discussed in terms of the microstructural changes induced during processing by hydrostatic extrusion.

Research of Friction and Wear Performance of Large Truck’s Brake Drum

2012 ◽  
Vol 503-504 ◽  
pp. 601-605
Author(s):  
Wen Yan Wang ◽  
Gao Lu ◽  
Jing Pei Xie ◽  
Jia Xi Wang
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Surface Quality ◽  
Friction And Wear ◽  
Wear Performance ◽  
Resistance Property ◽  
Adhesion Wear ◽  
Brake Drum ◽  
The Relationship

In this research, different frictions were settled to study the wear resistance of HT250, RuT15, RuT75 and QT500 according to the wear failure situation in automobile brake drum. And the relationship between wear mechanism, microstructure and mechanical properties were discussed. It can be seen from the friction and wear experiment that, under different friction and wear conditions, both of RuT35 and QT500 have the best wear resistance property while HT250 has the worst wear resistance property. With the increase of lord, the brake torque and friction coefficient of RuT35 stays unchangeable, showing well brake ability. With the increase of lord, the brake ability of HT250 was getting better, while QT500 showing the opposite. SEM was used to analyze the wear morphology, the results show that: the abrasive wear and adhesion wear are presented mainly. HT250 has a bad surface quality while QT500 and RuT15 have a bad surface quality. Generally speaking, RuT15 is the best material to made brake drum, in the consideration of were resistance and braking stability.

Sign in / Sign up

Export Citation Format

Share Document