scholarly journals The Role of Transfer Layer on the Sliding Wear Behavior of a Cu-15Ni-8Sn Alloy Under Different Loads

2021 ◽  
Author(s):  
Daoxi Li ◽  
Zhi Wang ◽  
Chao Zhao ◽  
Zongqiang Luo ◽  
wengwen Zhang
Keyword(s):  
Oxide Layer ◽  
Wear Mechanisms ◽  
Applied Load ◽  
Wear Behavior ◽  
Bearing Steel ◽  
Wear Property ◽  
Wear Properties ◽  
Transfer Layer ◽  
Gcr15 Bearing Steel ◽  
Nanocrystalline Particles

Abstract We studied the microstructure of the transfer layer and its effect on the wear mechanism and wear property of an aged Cu-15Ni-8Sn alloy against GCr15 bearing steel during dry sliding by changing the applied load. The results indicate that the aged Cu-15Ni-8Sn alloy shows different wear behavior and wear properties when the applied load changed, where the average friction coefficient and specific wear rate decrease quickly with increasing applied load in steady wear condition. The sample tested under relatively high applied load shows the best wear performance owing the thickest oxide layer exists in the transfer layer. The main wear mechanisms were found changing with varied applied. The metallic nanocrystalline particles and the relative ductile copper oxides promotes the formation of a thick and densified oxide layer. The change of the thickness and morphology of the oxide layer under different load can significantly affect the wear mechanisms.

Wear Mechanisms of PCBN Cutting Tools in Hard and Dry Cutting GCr15 Bearing Steel

2011 ◽  
Vol 197-198 ◽  
pp. 1494-1499
Author(s):  
Rui Ping Liu ◽  
Fu Ming Deng ◽  
Xue Jun Lu
Keyword(s):  
Phase Transition ◽  
Tool Wear ◽  
Wear Mechanisms ◽  
Joint Action ◽  
Cutting Tools ◽  
Bearing Steel ◽  
Element Distribution ◽  
Dry Cutting ◽  
Gcr15 Bearing Steel ◽  
Flank Face

GCr15 bearing steel was turned with PCBN cutting tools in a manner of hard and dry cutting, and the characteristics and morphology of rake and flank face of PCBN cutting tools were observed, the element distribution of different regions of rake and flank face of PCBN cutting tools were tested and analyzed by use of EDS, and finally the wear mechanisms of PCBN cutting tools were discussed. The results showed that the wear areas of rake and flank face of PCBN cutting tools were small and mostly concentrated near the tip and sub-chamfering, and the reason was mechanical, oxidation, chemical and phase transition wear, which resulted in the joint action of tool wear.

Experimental Study on Tribological Properties of Graphite-MoS2 Coating on GCr15

2018 ◽  
Vol 140 (5) ◽  
Author(s):  
F. M. Meng ◽  
Z. T. Cui ◽  
Z. T. Cheng ◽  
H. L. Han
Keyword(s):  
Experimental Study ◽  
Coefficient Of Friction ◽  
Tribological Properties ◽  
Rotational Speed ◽  
Applied Load ◽  
Bearing Steel ◽  
Experimental Results ◽  
Gcr15 Bearing Steel ◽  
Mos2 Coating ◽  
Scar Width

The graphite-MoS2 coated on GCr15 bearing steel is prepared through air spraying and its tribological performances are investigated experimentally. Then its coefficient of friction (COF) and wear scar width (WSW) are investigated through the MFT-5000 multifunction tribometer and other test equipments. The experimental results show that the addition of the graphite can effectively decrease the COF and narrow the WSW of the MoS2. There exists a critical applied load for wearing out the surface with the graphite-MoS2 coating. Moreover, there exists an optimal rotational speed of 500 rpm to decrease the COF and WSW of the GCr15 steel.

Fracture Resistance and Wear Properties of Silicon Nitride Ceramics

2008 ◽  
Vol 403 ◽  
pp. 53-56
Author(s):  
Hiroyuki Miyazaki ◽  
Hideki Hyuga ◽  
Yuichi Yoshizawa ◽  
Kiyoshi Hirao ◽  
Tatsuki Ohji
Keyword(s):  
Fracture Resistance ◽  
Material Removal ◽  
Wear Behavior ◽  
Sliding Contact ◽  
Wear Property ◽  
Indentation Fracture ◽  
Wear Properties ◽  
Silicon Nitrides ◽  
Nitride Ceramics ◽  
Si3n4 Ceramics

Six kinds of silicon nitrides with different microstructures were fabricated by changing the amount of sintering additives, Al2O3 and Y2O3. The hardness decreased with an increase in the amount of additives, whereas the indentation fracture resistance increased in the samples with large amount of additives due to the formation of coarse and elongated grains. The wear property of various Si3N4 ceramics was investigated in the sliding contact test without lubricant and was compared with the mechanical properties. The specific wear rate varied notably from 4x10-4 to 6x10-6 mm-3N-1m-1 depending on the compositions, which was difficult to explain directly from the hardness and fracture resistance. An indentation fracture model for material removal could correlate the wear properties with a function of hardness and fracture resistance of the materials, suggesting that the indentation model was likely to be valid for analyzing the wear behavior in this study.

scholarly journals Wear Property of Ductile Iron Locally Reinforced with Cr-Containing Steel Inserts

2010 ◽  
Vol 457 ◽  
pp. 441-446 ◽  
Author(s):  
Celis Mayerling Martinez ◽  
Nathalie Valle ◽  
Jacques Lacaze ◽  
Ingólfur Thorbjornsson ◽  
Birgir Johannesson ◽  
...  
Keyword(s):  
Ductile Iron ◽  
Secondary Ion Mass Spectrometry ◽  
Wear Behavior ◽  
Wear Property ◽  
Wear Properties ◽  
Sliding Motion ◽  
Transmission Electron ◽  
Before And After ◽  
The Matrix ◽  
Secondary Ion

The influence on the wear properties of ductile iron with Cr-containing steel inserts has been investigated before and after austempering. The microstructure of locally reinforced ductile iron, with and without an austempering treatment, has been characterized using optical microscopy, scanning and transmission electron microscopy and secondary ion mass spectrometry. The introduction of such inserts during casting leads to the precipitation of carbides M3C, M7C3 and M23C6 (M stands for Fe and/or Cr) inside the inserts and to M3C and M7C3 in the region surrounding the inserts. After austempering, a partial dissolution of these latter carbides and transformation of the matrix to ausferrite occur. The wear properties of these materials have been evaluated under reciprocating sliding motion using cylinder-on-disc line contact configuration. The results of the present investigation show a better wear behavior of the reinforced material related to the microstructural changes observed.

Effect of Subsurface Deformation on Sliding Wear Behavior of Ti-29Nb-13Ta-4.6Zr Alloys for Biomedical Applications

2014 ◽  
Vol 616 ◽  
pp. 270-274
Author(s):  
Yoon Seok Lee ◽  
Mitsuo Niinomi ◽  
Masaaki Nakai ◽  
Kengo Narita ◽  
Junko Hieda ◽  
...  
Keyword(s):  
Wear Mechanisms ◽  
Wear Behavior ◽  
Testing Machine ◽  
Wear Test ◽  
Wear Testing ◽  
Wear Properties ◽  
Delamination Wear ◽  
Frictional Wear ◽  
Fixation Devices ◽  
Spinal Fixation Devices

The wear mechanisms of conventional Ti–6Al–4V extra-low interstitial (Ti64) and the new Ti–29Nb–13Ta–4.6Zr (TNTZ) were studied to investigate the wear properties of Ti64/TNTZ for application in spinal fixation devices. Ti64 and TNTZ balls and discs were first prepared as wear-test specimens. A ball-on-disc frictional wear-testing machine was used in air to perform the frictional wear tests of the Ti64 and TNTZ discs mated against Ti64 and TNTZ balls. The wear mechanisms were investigated using a scanning electron microscopy to analyze the worn surfaces and wear debris. The volume losses for the TNTZ discs were larger than those for the Ti64 ones, regardless of the mating ball material. Furthermore, the morphologies of the wear tracks and the debris of the Ti64 and TNTZ discs were different, suggesting that the wear mechanisms for the Ti64 and TNTZ discs were abrasive and delamination wear caused by mild and severe subsurface deformations of the Ti64 and TNTZ, respectively, regardless of the mating ball material.

Sliding Friction and Wear Behavior of GCr15 Bearing Steel at Different Temperatures

2021 ◽  
Vol 324 ◽  
pp. 35-42
Author(s):  
Dong Yue Wang ◽  
Rong Chang Xu ◽  
Dian Xiu Xia ◽  
Shou Ren Wang ◽  
Ying Chao Pei ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Room Temperature ◽  
Sliding Friction ◽  
Wear Behavior ◽  
Testing Machine ◽  
Bearing Steel ◽  
Wear Testing ◽  
Fatigue Wear ◽  
Gcr15 Bearing Steel ◽  
Electron Image

The effects of temperature on the friction and wear properties of GCr15 were studied by using a RETC multifunctional friction and wear testing machine. The microstructure characterization of the worn surface of the experimental steel was studied by means of metallographic microscope (OM), white light interferometer, secondary electron image (SEI) and back scattered electron image (BEI).The results show that the wear resistance of GCr15 bearing steel at room temperature is better than that at 100°C, 150°C and 200°C. At room temperature, the main wear forms of GCr15 are adhesion wear and fatigue wear. However, at 100°C, 150°C, 200°C, the friction coefficient and oxidation degree in the wear zone first increase and then decrease with the increase of temperature, and the wear form is mainly oxidized wear, accompanied by abrasive wear.

Friction and Wear Behavior of Structural Ceramics Sliding against Bearing Steel under Vacuum Condition

2011 ◽  
Vol 474-476 ◽  
pp. 973-978
Author(s):  
Yong Xing Tong ◽  
Li Qin Wang ◽  
Le Gu ◽  
Bo Peng
Keyword(s):  
Friction And Wear ◽  
Applied Load ◽  
Wear Behavior ◽  
Ceramic Materials ◽  
Bearing Steel ◽  
Operating Conditions ◽  
Vacuum Condition ◽  
Structural Ceramics ◽  
Friction And Wear Behavior ◽  
The Coefficient Of Friction

The friction and wear behavior of Si3N4, SiC and ZrO2 sliding against M50 bearing steel under vacuum condition at various applied load were investigated. The results showed that the properties of different ceramic materials cause the difference in wear behaviors. The coefficient of friction was lowest in SiC and M50 bearing steel couple than other cases for graphitic carbon replaced carbidic carbon at the worn layer of SiC. The specific wear rate of ZrO2 was highest and the lowest was Si3N4. The ceramic ball materials have transferred on M50 bearing steel surfaces and tribofilm consistently formed on the ceramic balls wearing surfaces. Dominant wear behaviors for three structural ceramics were adhesion abrasion, plastic deformation and brittle fracture. The couple with Si3N4 and M50 showed the best operating conditions for friction and wear resistance under higher applied load.

Abrasive Wear Property of Stellite190 Welding Coatings for Drill Tools

2011 ◽  
Vol 314-316 ◽  
pp. 1415-1419
Author(s):  
Ye Fa Tan ◽  
Xiao Long Wang ◽  
Yi Qiang Tu ◽  
Hua Tan ◽  
Chun Hua Zhou ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Abrasive Wear ◽  
Wear Mechanisms ◽  
Dry Friction ◽  
Wear Behavior ◽  
Corrosive Wear ◽  
Friction Condition ◽  
Wear Property ◽  
Welding Technology ◽  
Abrasive Wear Behavior

In order to improve the wear resistance of drill tools, stellite190 welding coatings were prepared by oxygen-acetylene flame welding technology. The abrasive wear behavior and wear mechanisms of the coatings were investigated in both dry and water friction conditions. The research results show that the wear losses of the coatings increase with the increase of loads and sliding speeds. The effects of sliding speeds on wear losses of the coatings become intense with the increase of loads. The wear losses of the coatings in water friction condition are bigger than those in dry friction condition. The main wear mechanisms of the coatings are micro-cutting and multi-plastic deformation wear in dry friction condition, and accompanied by stress corrosive wear in water friction condition.

Influence of nanostructured Cu on the mechanical properties of Cu–MWCNTs composites

2020 ◽  
Vol 111 (6) ◽  
pp. 469-478
Author(s):  
Lailesh Kumar ◽  
Santosh Kumar Sahoo ◽  
Syed Nasimul Alam
Keyword(s):  
Wear Mechanisms ◽  
Mechanical Milling ◽  
Wear Behavior ◽  
Homogeneous Distribution ◽  
Wear Properties ◽  
Multiwalled Carbon ◽  
Solid Solution Strengthening ◽  
Fine Grain ◽  
Fine Grain Strengthening ◽  
Uniform Dispersion

Abstract In the present investigation, Cu-multiwalled carbon nanotubes (MWCNTs) nanocomposites were developed through mechanical milling using nanostructured Cu as a matrix and MWCNTs as nanofillers. The influence of nanostructured Cu on the microstructure, microhardness, and wear behavior of Cu-MWCNTs nanocomposites was also studied. The crystallite size of nanostructured Cu powder via mechanical milling for 25 h was found to be 16 nm. The major challenge associated with the development of Cu-MWCNTs nanocomposites is the uniform dispersion of the CNTs in the Cu matrix, which was addressed by incorporating nanostructured Cu, leading to the homogeneous distribution of CNTs and good bonding between the CNTs and the Cu matrix. A significant improvement in relative density and microhardness with <3 wt.% MWCNTs was observed compared to pure asreceived Cu and its composites. The hardness of Cu-3 wt.% MWCNTs nanocomposite developed using nanostructured Cu were achieved at <800 MPa, which is about 2.3 times higher than that of the as-received Cu sample (~ 359 MPa). The significant increment in mechanical and wear properties mainly originates from fine-grain strengthening effects and solid solution strengthening. The wear mechanisms in the various nanostructured Cu-MWCNTs composites were studied in detail and oxidation wear was identified as one of the main wear mechanisms.

scholarly journals Effect of Cold Ring Rolling on the Wear Resistance of GCr15 Bearing Steel after Quenching and Tempering

Metals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 647
Author(s):  
Bohan Lu ◽  
Wenting Wei ◽  
Huajie Mao ◽  
Xiaohui Lu
Keyword(s):  
Retained Austenite ◽  
Wear Behavior ◽  
Bearing Steel ◽  
Ring Rolling ◽  
Wear Loss ◽  
Austenite Content ◽  
Gcr15 Bearing Steel ◽  
Cold Ring Rolling ◽  
Quenching And Tempering ◽  
Carbide Content

In this work, the effects on dry wear behavior of cold ring rolling (CRR) of GCr15 bearing steel, after quenching and tempering (QT) heat treatment are investigated. The effects on steel microstructures and wear mechanisms of CRR with different austenitizing times are also discussed. The results show that, with a short austenitizing time of 10 min, CRR can increase the retained austenite content, decrease the undissolved carbide content and improve the hardness of the specimen, thus reducing ploughing and fatigue flaking, and decreasing the wear loss of the CRR specimen. With the longer austenitizing time of 20 min, the retained austenite content increases, the undissolved carbide content decreases, and the hardness increases significantly, both in specimens with and without CRR, so that ploughing, fatigue flaking, and wear loss can all be decreased. However, with an austenitizing time of less than 20 min, the effects of CRR on retained austenite content, undissolved carbide content, and hardness are not significant. Thus, CRR of less than 20 min cannot further improve wear morphology or decrease wear loss.

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