Friction and Wear Performances of Magnesium Alloy against Steel under Lubrication of Rapeseed Oil with N-Containing Additive

2012 ◽  
Vol 562-564 ◽  
pp. 350-354
Author(s):  
Jian Hua Fang ◽  
Jiu Wang ◽  
Jiang Wu ◽  
Bo Shui Chen ◽  
Ling Dong
Keyword(s):  
Magnesium Alloy ◽  
Rapeseed Oil ◽  
Friction And Wear ◽  
Chemical Species ◽  
Bearing Steel ◽  
X Ray ◽  
Lubrication Film ◽  
Gcr15 Bearing Steel ◽  
Strong Adsorption ◽  
Wear And Friction

A N-containing additive, amide type modified rapeseed oil (named as NRO), was prepared by chemical modification of rapeseed oil and characterized by infrared spectrum The friction and wear performances of AZ91D magnesium alloy against GCr15 bearing steel under the lubrication of rapeseed oil formulated with NRO were evaluated on a SRV tribotester. The topographies and the chemical species of the worn surfaces of magnesium alloy were analyzed by a scanning electron microscope (SEM) and an X-ray photoelectron spectroscope (XPS), respectively. The results indicated that the friction and wear of the magnesium alloy—steel tribomates could be effectively reduced by formulating NRO into rapeseed oil lubricant. The friction coefficients and the wear volumes of magnesium alloy decreased with increasing contents of NRO. The surface lubricated with NRO-doped rapeseed oil was characterized by less wear as compared with that lubricated with neat rapeseed oil. The enhanced anti-wear and friction-reducing abilities of rapeseed oil by NRO in the lubrication of magnesium alloy against steel were ascribed to the formation of a composite boundary lubrication film due to the strong adsorption of NRO and rapeseed oil onto the lubricated surfaces and their tribochemical reactions with magnesium alloy.

Friction and Wear Performances of Magnesium Alloy against Steel under Lubrication of Soybean Oil with S-Containing Additive

2014 ◽  
Vol 538 ◽  
pp. 19-23 ◽  
Author(s):  
Jian Hua Fang ◽  
Dong Yong Xia ◽  
Bo Shui Chen ◽  
Jiang Wu ◽  
Jiu Wang
Keyword(s):  
Magnesium Alloy ◽  
Soybean Oil ◽  
Rapeseed Oil ◽  
Friction And Wear ◽  
Chemical Species ◽  
Bearing Steel ◽  
Lubrication Film ◽  
Gcr15 Bearing Steel ◽  
Modified Soybean Oil ◽  
Strong Adsorption

A S-containing additive, sulfuration modified soybean oil (named as SSO), was prepared by chemical modification of soybean oil with sulfur compounds. The friction and wear performances of AZ91D magnesium alloy against GCr15 bearing steel under the lubrication of rapeseed oil formulated with SSO were evaluated on a SRV tribotester. The topographies and the chemical species of the worn surfaces of magnesium alloy were analyzed by a scanning electron microscope (SEM) and an X-ray photoelectron spectroscope (XPS), respectively. The results indicated that the friction and wear of the magnesium alloy-steel tribomates could be effectively reduced by formulating SSO into rapeseed oil lubricant. The friction coefficients and the wear volumes of magnesium alloy decreased with increasing contents of SSO. The surface lubricated with SSO-doped rapeseed oil was characterized by less wear as compared with that lubricated with neat rapeseed oil. The enhanced anti-wear and friction-reducing abilities of rapeseed oil by SSO in the lubrication of magnesium alloy against steel were ascribed to the formation of a composite boundary lubrication film due to the strong adsorption of SSO and rapeseed oil onto the lubricated surfaces and their tribochemical reactions with magnesium alloy.

Friction and wear performances of magnesium alloy against steel under lubrication of rapeseed oil with S-containing additive

2011 ◽  
Vol 21 (12) ◽  
pp. 2649-2653 ◽  
Author(s):  
Jian-hua FANG ◽  
Fu-sheng PAN ◽  
Bo-shui CHEN ◽  
Jiang WU ◽  
Ling DONG
Keyword(s):  
Magnesium Alloy ◽  
Rapeseed Oil ◽  
Friction And Wear

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.

Synthesis and Tribological Behaviors of SiO2/SnO2 Composite Nanoparticles in Rapeseed Oil

2015 ◽  
Vol 713-715 ◽  
pp. 2928-2932 ◽  
Author(s):  
Jian Hua Fang ◽  
Bo Shui Chen ◽  
Xue Chun Wang ◽  
Jiu Wang ◽  
Jiang Wu
Keyword(s):  
Carrying Capacity ◽  
Rapeseed Oil ◽  
Chemical Species ◽  
Load Carrying Capacity ◽  
Subsequent Formation ◽  
Base Oil ◽  
X Ray ◽  
Lubricating Layer ◽  
Load Carrying ◽  
Shearing Strength

SiO2/SnO2-complex nanoparticles were prepared making use of a chemical method. The tribological properties of the resulting complex nanoparticles as an additive in rapeseed oil were evaluated using four–ball friction testers. The topographies and the chemical species of the worn surfaces of steel ball were analyzed by a scanning electron microscope (SEM) and an X-ray photoelectron spectroscope (XPS), respectively. It was found that the complex nanoparticles as the additive contributed to greatly improve the anti-wear ability and load-carrying capacity of the rapeseed base oil. The improved anti-wear ability and load-carrying capacity of the base stock in the presence of the complex nanoparticles as the additive were attribute to the adsorption and deposition of the nanoparticles on the sliding surface and subsequent formation of a boundary lubricating layer with a small shearing strength.

Experimental Analysis of Friction and Wear of Laser Microtextured Surface Filled With Composite Solid Lubricant and Lubricated With Grease on Sliding Surfaces

2017 ◽  
Vol 139 (2) ◽  
Author(s):  
Xijun Hua ◽  
Julius Caesar Puoza ◽  
Jianguo Sun ◽  
Peiyun Zhang ◽  
Jinghu Ji ◽  
...  
Keyword(s):  
Friction And Wear ◽  
Solid Lubricant ◽  
Bearing Steel ◽  
Textured Surface ◽  
Plain Bearing ◽  
Textured Surfaces ◽  
Gcr15 Bearing Steel ◽  
Steel Material ◽  
Working Performance ◽  
Composite Solid

Experimental studies of friction and wear on textured surfaces filled with composite solid lubricant and lubricated with grease were conducted on a sliding plain bearing to enhance the working performance and lifetime under different conditions. Circular microdimples of different diameters were fabricated on GCr15 bearing steel specimens using the semiconductor sound and light pumped Nd:YAG laser machining equipment. Ring-on-ring tribological test configuration with GCr15 tribopairs under a combined non-Newtonian lubrication of grease and composite lubricant was performed. The results showed that the surface textures on specimen GCr15 bearing steel material filled composite solid lubricant and lubricated with grease (TLG), reduced the friction by 27%, 46%, and 75% of the grease only (TG), solid lubricant only (TL), and nonlubricated (T) specimens, respectively. The textured specimen with dimple diameter of 109 μm lowered the maximum coefficient of friction by 38% and enhanced the antiwear properties of GCr15 bearing steel material remarkably. This indicated that grease has great potential in promoting service life and working performance of sliding plain bearing when combined with composite solid lubricant in a laser-textured surface. It is therefore beneficial for applications in the machinery and automotive components industries in saving energy and reducing CO2 emission.

Lubricated Wear Behavior of Composition-Modulated Nickel-Copper Coatings

1989 ◽  
Vol 111 (1) ◽  
pp. 156-160 ◽  
Author(s):  
A. W. Ruff ◽  
N. K. Myshkin
Keyword(s):  
Wear Behavior ◽  
Wear Test ◽  
Bearing Steel ◽  
Electrical Measurements ◽  
Lubrication Film ◽  
Paraffin Oil ◽  
Copper Coatings ◽  
Nickel Copper ◽  
Wear And Friction ◽  
Test Geometry

A study has been conducted of the wear behavior of electrodeposited, composition-modulated, nickel-copper materials having two different layer spacings, 10 nm and 100 nm, under lubricated sliding conditions against type 52100 bearing steel. The materials were prepared as coatings on steel cylinders; a standard crossed-cylinder wear test geometry was used. Two lubricating liquids were used: pure paraffin oil, with and without the addition of oleic acid. Wear and friction coefficient data were obtained. Electrical measurements of the contact resistance were also made during sliding to further study the nature of the boundary lubrication film present.

Study on Residual Stress of GCr15 Bearing Steel under Ultrasonic Vibration Turning

2012 ◽  
Vol 522 ◽  
pp. 173-177
Author(s):  
Jing Lin Tong ◽  
Bo Zhao ◽  
Feng Jiao
Keyword(s):  
Compressive Stress ◽  
Ultrasonic Vibration ◽  
Cutting Parameters ◽  
Bearing Steel ◽  
Residual Compressive Stress ◽  
X Ray Diffraction ◽  
Machined Surface ◽  
X Ray ◽  
Gcr15 Bearing Steel ◽  
The Common

The effects of the cutting parameters on residual stresss were investigated in common and ultrasonic vibration hard turning bearing steel GCr15 with PCBN. The residual stresses under the machined surface were measured by X-ray diffraction technique. The results obtained in this study show that residual compressive stress is produced both in common and ultrasonic turning of GCr15 bearing steel. Under the same turning condition the residual compressive produced by the ultrasonic turning is smaller than that by the common turning. Residual compressive stress can improve the fatigue performance and life of workpiece, so the cutting parameters should be optimized to get the best residual compressive stress in ultrasonic turning.

Chemical Species Identification in an SEM by Changes in Emitted X-Ray Energies

1974 ◽  
Vol 32 ◽  
pp. 570-571
Author(s):  
R. H. Duff
Keyword(s):  
Species Identification ◽  
Valence Electron ◽  
Chemical Species ◽  
X Rays ◽  
Chemical Bonds ◽  
Small Shift ◽  
X Ray ◽  
Electron Transitions ◽  
Peak Energy ◽  
Chemical Combination

A material irradiated with electrons emits x-rays having energies characteristic of the elements present. Chemical combination between elements results in a small shift of the peak energies of these characteristic x-rays because chemical bonds between different elements have different energies. The energy differences of the characteristic x-rays resulting from valence electron transitions can be used to identify the chemical species present and to obtain information about the chemical bond itself. Although these peak-energy shifts have been well known for a number of years, their use for chemical-species identification in small volumes of material was not realized until the development of the electron microprobe.

Utilisation of High-Energy Heat Sources in Magnesium Alloy Surface Layer Treatment

2013 ◽  
Vol 58 (2) ◽  
pp. 619-624 ◽  
Author(s):  
M. Szafarska ◽  
J. Iwaszko ◽  
K. Kudła ◽  
I. Łegowik
Keyword(s):  
Surface Layer ◽  
Magnesium Alloy ◽  
Physicochemical Properties ◽  
Treatment Effectiveness ◽  
High Energy ◽  
Alloy Surface ◽  
Heat Sources ◽  
X Ray ◽  
Additional Equipment ◽  
Alloy Surface Layer

The main aim of the study was the evaluation of magnesium alloy surface treatment effectiveness using high-energy heat sources, i.e. a Yb-YAG Disk Laser and the GTAW method. The AZ91 and AM60 commercial magnesium alloys were subject to surface layer modification. Because of the physicochemical properties of the materials studied in case of the GTAW method, it was necessary to provide the welding stand with additional equipment. A novel two-torch set with torches operating in tandem was developed within the experiment. The effectiveness of specimen remelting using a laser and the GTAW method was verified based on macro- and microscopic examinations as well as in X-ray phase analysis and hardness measurements. In addition, the remelting parameters were optimised. The proposed treatment methodology enabled the achieving of the intended result and effective modification of a magnesium alloy surface layer.

TiN/ZrO2 multilayers synthesized on GCr15 bearing steel using plasma immersion ion implantation and deposition

2007 ◽  
Vol 201 (15) ◽  
pp. 6615-6618 ◽  
Author(s):  
Tao Sun ◽  
Langping Wang ◽  
Yonghao Yu ◽  
Yuhang Wang ◽  
Xiaofeng Wang ◽  
...  
Keyword(s):  
Ion Implantation ◽  
Bearing Steel ◽  
Gcr15 Bearing Steel ◽  
Plasma Immersion Ion Implantation
Sign in / Sign up

Export Citation Format

Share Document