scholarly journals A Slurry-Pot Abrasive Wear Test Device for Several Composite Materials

2019 ◽  
Vol 4 (1) ◽  
pp. 437-444
Author(s):  
Hasan Muhandes ◽  
Gábor Kalácska
Keyword(s):  
Composite Materials ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Wear Test ◽  
Test Machine ◽  
Agricultural Machinery ◽  
Test Device ◽  
Plate Test ◽  
Wide Range ◽  
Proper Material

To choose the proper material for agricultural machinery we tested several materials with abrasive cloth on the pin-on-plate test device. After having the pre-results, we launched more complex abrasive testing (slurry-pot) simulating more realistic mode with soils to investigate the abrasive wear mechanism and resistance of the selected up-to-date polymeric structural materials. for this, we developed a modified slurry-pot test machine that ensures the comparability of the materials over a wide range of conditions. Through this device, several parameters could be controlled like speed, the soil particle’s hit angle on the tested surface.

An Innovative System for Fretting Wear Testing Under Oscillating Normal Force

2000 ◽  
Vol 15 (7) ◽  
pp. 1591-1599 ◽  
Author(s):  
M. Z. Huq ◽  
C. Butaye ◽  
J-P. Celis
Keyword(s):  
Contact Resistance ◽  
Normal Force ◽  
Electrical Contact ◽  
Wear Test ◽  
Fretting Wear ◽  
Wear Testing ◽  
Mode Ii ◽  
Test Machine ◽  
Electrical Contact Resistance ◽  
Wide Range

Material damage caused by fretting wear is of significant concern in many engineering applications. This paper describes the design and performance of a new machine for the laboratory investigation of fretting wear under oscillating normal force (fretting mode II). The test machine uses an electromagnetic actuator to impose an oscillating normal force between the contacting bodies at a constant force amplitude over a wide range of frequencies. The principle of the actuation mechanism and the fretting wear induced with this particular wear test configuration are outlined in detail. Normal force and electrical contact resistance were measured on-line during fretting mode II wear tests. The performance of the wear test machine is illustrated by data obtained for different materials combinations, namely, hard materials, such as high-speed steel and (Ti,Al)N coatings oscillating against alumina ball counterbodies, and soft materials, such as a tin coating oscillating against the same. In general, wearing of the counterbodies was observed in the slip region. It has been observed that hard coatings and bulk ceramics are prone to fretting fatigue cracking. The evolution of electrical contact resistance in the case of the self-mated soft tin coatings tested under fretting mode II conditions is also reported.

scholarly journals Anti-wear Mechanism Analysis of Nano-CaCO3 Additives

2018 ◽  
Vol 38 ◽  
pp. 02018 ◽  
Author(s):  
Zhen Xu ◽  
Junfeng Sun
Keyword(s):  
Wear Mechanism ◽  
Piston Ring ◽  
Reference Value ◽  
Wear Test ◽  
Lubricating Oil ◽  
Mechanism Analysis ◽  
Test Device ◽  
Wear Process ◽  
Cylinder Piston ◽  
Lubricating Oil Additive

In this paper, the wear test was carried on with cylinder piston by the wear test device, receiving the results of the piston ring wear and abrasive characteristics by monitoring the wear process, the thesis analysis and put forward the nano-CaCO3 lubricating oil additive anti wear mechanism by the ferrography analysis technology, and provide the technical reference for the relevant measures to reduce wear and the friction, and provide reference value for further study on the related theories of reducing wear and reducing friction.

scholarly journals Effect of VN and TiB2-TiCx Reinforcement on Wear Behavior of Al 7075-Based Composites

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3389
Author(s):  
Yaping Bai ◽  
Jiale Wei ◽  
Naqing Lei ◽  
Jianping Li ◽  
Yongchun Guo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Abrasive Wear ◽  
Wear Mechanism ◽  
Room Temperature ◽  
Wear Behavior ◽  
Wear Test ◽  
Wear Properties ◽  
Al 7075 ◽  
Hot Pressing Sintering ◽  
Oxidation Wear

Al 7075 alloy, 15 wt.% VN/7075 composites, and 20 wt.% TiB2-TiCx/7075 composites were prepared by ball milling with subsequent hot-pressing sintering. The microstructure, hardness, and wear properties at room temperature to 200 °C of Al 7075-based composites with different reinforcement phases were discussed. The grain uniformity degree values of 15 wt.% VN/7075 composites and 20 wt.% TiB2-TiCx/7075 composites were 0.25 and 0.13, respectively. The reinforcement phase was uniformly distributed in 15 wt.% VN/7075 composites and 20 wt.% TiB2-TiCx/7075 composites, almost no agglomeration occurred. The order of hardness was 20 wt.% TiB2-TiCx/7075 composites (270.2 HV) > 15 wt.% VN/7075 composites (119.5 HV) > Al 7075 (81.8 HV). At the same temperature, the friction coefficient of 15 wt.% VN/7075 composites was the lowest, while the volume wear rate of 20 wt.% TiB2-TiCx/7075 composites was the lowest. With the increase of temperature, the wear mechanism of Al 7075 changed from spalling wear to oxidation wear and adhesion wear. However, the wear mechanisms of 15 wt.% VN/7075 and 20 wt.% TiB2-TiCx/7075 composites changed from abrasive wear at room temperature to wear mechanism (oxidation wear, abrasive wear, and adhesive wear) at medium and low temperature. Comprehensive wear test results indicated that 20 wt.% TiB2-TiCx/7075 composites had excellent tribological properties at medium and low temperature.

The Development of the TBM Disc Cutter Test Device for Cutting Rock

2014 ◽  
Vol 889-890 ◽  
pp. 292-296 ◽  
Author(s):  
Yi Min Xia ◽  
Tao Ouyang ◽  
Lv Jian Xie ◽  
Qing Tan ◽  
Chun Lei Luo ◽  
...  
Keyword(s):  
High Efficiency ◽  
Static Load ◽  
Impact Load ◽  
Indentation Test ◽  
Wear Test ◽  
Disc Cutter ◽  
Test Machine ◽  
Test Device ◽  
Vertical Loading ◽  
Cutting Test

In order to study the disc cutter cutting performance and the cutters combination feature and to explore a new high-efficiency breaking method in hard rock environment, a new multifunction disc cutter test device plan is established and carried out based on the analysis of relevant research and test equipment at home and abroad. The test device consists of a vertical loading mechanism, a longitudinal cutting mechanism, a shock loading mechanism and a control system, etc. It can be used to conduct not only single test such as cutting under static load, fragmentation under impact load, indentation test under static load and wear test of the disc cutter, but also combined cutting test under impact and static load. At last, granite was cut on this test device by the TBM disc cutter under different loads, the results are desirable and show that the test machine can provide the relevant test conditions and the basic data for the design of the TBM disc cutter.

scholarly journals Wear of Medium Carbon Steel under Friction Loading with Various Contact Surface Temperature

2021 ◽  
Vol 12 (1) ◽  
pp. 153
Author(s):  
I Made Widiyarta ◽  
I Made Parwata ◽  
I Putu Lokantara ◽  
Dwipayana Dwipayana
Keyword(s):  
Elevated Temperature ◽  
Carbon Steel ◽  
Wear Rate ◽  
Surface Temperature ◽  
Wear Mechanism ◽  
Contact Surface ◽  
Wear Test ◽  
Medium Carbon Steel ◽  
Test Machine ◽  
Medium Carbon

<span lang="PT-BR">The work presented in this paper is to investigate the wear rate and wear mechanism of medium carbon steel with carbon contents of about 0,5 wt.% under the friction load with various contact surface temperatures. The wear test was performed by using the linear reciprocating ball-on-flat wear test machine. To develop the elevated temperature on the surface of the wear test specimen, the heater assembled into the wear test machine. The surface temperature of the wear specimen was set in the range of 30 ºC up to 250 ºC. The test was taken under 5000 cycles of friction loading with a maximum of the normal load of 25N. The experiment results show that the change in the contact surface temperature in the range of 30 ºC up to 250 ºC causes the wear rate to increase slightly. This is because the elevated temperature at the surface was not high enough to cause the hardness of the material to decrease significantly. The worn surface looks very thin scratches and slightly deformed layers, and the wear mechanism had identified as oxide wear.</span>

Research on Wear Behavior of NBR by 45 Steel in Crude Oil Medium

2011 ◽  
Vol 413 ◽  
pp. 308-313
Author(s):  
Zhe Wang ◽  
Shi Jie Wang
Keyword(s):  
Friction Coefficient ◽  
Crude Oil ◽  
Abrasive Wear ◽  
Constant Temperature ◽  
Wear Behavior ◽  
Friction Pair ◽  
Wear Test ◽  
Practical Significance ◽  
Test Machine ◽  
Premature Failure

NBR is the essential material selected for the stator of progressing cavity pump which is used for oil extraction. The premature failure of NBR is the primary cause for shortening working life of the pump. Wear behavior of NBR and its mechanism by 45 steel were studied in crude oil medium using a MPV-600-type compute-controlled abrasive wear test machine. Through the friction test found at constant low load, and at constant temperature, the friction coefficient is along with the rotational speed increased first and then decreased and then increased; At constant low speed, and at constant temperature, friction coefficient decreases as the force increases; The friction coefficient increases with rising temperature first and then drops; The main wear mechanism of the rubber in crude oil is wet abrasive wear. The test results on the rational selection of working parameters to improve rubber metal friction pair of whole life have practical significance.

scholarly journals Pin-on-Plate Abrasive Wear Test for Several Composite Materials

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 469 ◽  
Author(s):  
Hasan Muhandes ◽  
Gábor Kalácska ◽  
Nawar Kadi ◽  
Mikael Skrifvars
Keyword(s):  
Composite Materials ◽  
Abrasive Wear ◽  
Wear Test

AISI 1566

Alloy Digest ◽  
1984 ◽  
Vol 33 (2) ◽  
Keyword(s):  
Carbon Steel ◽  
Heat Treating ◽  
Agricultural Machinery ◽  
High Carbon ◽  
Hand Tools ◽  
Steel Mills ◽  
Wide Range ◽  
Cold Worked ◽  
Hot Rolled ◽  
Good Workability

Abstract AISI 1566 is a high-carbon (nominally 0.66% carbon) steel containing 0.85-0.15% manganese. Its hardenability is low and on austenitizing and liquid quenching it develops a hard (martensitic) surface with a soft, ductile core. It can be used in the hot-rolled, annealed, normalized, cold-worked or liquid-quenched-and-tempered condition for a wide range of applications. It has good machinability and good workability. Its many uses include springs, shafts, hand tools, railway parts and agricultural machinery. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: CS-100. Producer or source: Carbon steel mills.

INCREASING THE WEAR RESISTANCE OF THE WORKING BODIES OF AGRICULTURAL MACHINES BY THE HDTV METHOD WITH ADDING POWDER OF THE EED METHOD

2020 ◽  
Vol 4 (141) ◽  
pp. 123-131
Author(s):  
IL’YA ROMANOV ◽  
Keyword(s):  
Wear Resistance ◽  
Abrasive Wear ◽  
High Frequency ◽  
Machine Building ◽  
Abrasive Wear Resistance ◽  
Research Purpose ◽  
Powder Materials ◽  
Agricultural Machinery ◽  
Resource Saving ◽  
Working Bodies

The development of energy and resource-saving methods and technologies for strengthening and restoring the working bodies of agricultural machinery will increase their abrasive wear resistance and durability by using materials from machine-building waste and reduce the cost by 10-30 percent without reducing operational characteristics. (Research purpose) The research purpose is in increasing the abrasive wear resistance and durability of cultivator legs by surfacing powder materials obtained by electroerosive dispersion from solid alloy waste by high-frequency currents. (Materials and methods) Authors obtained a powder for research on their own experimental installations of the CCP "Nano-Center" of electroerosive dispersion from waste of sintered hard alloys of the T15K6 brand. The microhardness of powders and coatings on microshifts was measured using the PMT-3 device, and the hardness of coatings with the KMT-1 microhardometer was measured using the Rockwell method according to GOST 9013-59. The microwave-40AV installation was used to assess the wear resistance of materials of working bodies of tillage machines. (Results and discussion) In the course of laboratory wear tests the relative wear resistance of samples hardened by high-frequency surfacing currents significantly exceeds the wear resistance of non-hardened samples made OF 65g steel, accepted as the reference standard. (Conclusions) Based on the results of experimental studies, the article proposes a new resource-saving technological process for strengthening the working bodies of agricultural machinery through the use of materials from machine-building waste, which allows increasing the abrasive wear resistance of working bodies by 1.5-2 times due to the use of tungsten-containing materials.

scholarly journals Defects and uncertainties of adhesively bonded composite joints

2021 ◽  
Vol 3 (9) ◽  
Author(s):  
Sadik Omairey ◽  
Nithin Jayasree ◽  
Mihalis Kazilas
Keyword(s):  
Composite Materials ◽  
Composite Structures ◽  
Production Efficiency ◽  
Adhesive Bonding ◽  
Detection Methods ◽  
Bonded Joints ◽  
Adhesively Bonded ◽  
Adhesively Bonded Joints ◽  
Wide Range ◽  
Bonded Composite

AbstractThe increasing use of fibre reinforced polymer composite materials in a wide range of applications increases the use of similar and dissimilar joints. Traditional joining methods such as welding, mechanical fastening and riveting are challenging in composites due to their material properties, heterogeneous nature, and layup configuration. Adhesive bonding allows flexibility in materials selection and offers improved production efficiency from product design and manufacture to final assembly, enabling cost reduction. However, the performance of adhesively bonded composite structures cannot be fully verified by inspection and testing due to the unforeseen nature of defects and manufacturing uncertainties presented in this joining method. These uncertainties can manifest as kissing bonds, porosity and voids in the adhesive. As a result, the use of adhesively bonded joints is often constrained by conservative certification requirements, limiting the potential of composite materials in weight reduction, cost-saving, and performance. There is a need to identify these uncertainties and understand their effect when designing these adhesively bonded joints. This article aims to report and categorise these uncertainties, offering the reader a reliable and inclusive source to conduct further research, such as the development of probabilistic reliability-based design optimisation, sensitivity analysis, defect detection methods and process development.

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