An Overview of Dry Sliding Wear of Two-Phase FeNiMnAl Alloys

2012 ◽  
Vol 1516 ◽  
pp. 103-108 ◽  
Author(s):  
Xiaolan Wu ◽  
Fanling Meng ◽  
Ian Baker ◽  
Hong Wu ◽  
Paul R. Munroe
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Energy Dispersive Spectrometer ◽  
Scanning Transmission Electron Microscope ◽  
Dry Sliding Wear ◽  
Two Phase ◽  
Test Environment ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Pin On Disc

ABSTRACTThe pin-on-disc wear behavior of nanostructured two-phase Fe30Ni20Mn20Al30 and eutectic lamellar-structured Fe30Ni20Mn35Al15 is compared emphasizing the influence of the microstructure and mechanical properties of alloys as well as the effect of test environment. Although the wear of both alloys was greater in oxygen-containing environments, eutectic Fe30Ni20Mn35Al15 is less sensitive to oxygen than nanostructured Fe30Ni20Mn20Al30. Abrasive wear dominated during the wear in all cases, while plastic deformation also occurred during the wear of eutectic Fe30Ni20Mn35Al15. A tribolayer of zirconia, which was embedded in the surface of the wear pin, was characterized using a scanning transmission electron microscope equipped with an energy dispersive spectrometer.

Dry Sliding Wear Behavior of Ti-6Al-4V Alloy

2015 ◽  
Vol 830-831 ◽  
pp. 333-336 ◽  
Author(s):  
M. Ananda Jothi ◽  
S. Ramanathan
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Energy Dispersive Spectrometer ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Rates ◽  
Pin On Disc ◽  
Marine Applications ◽  
Sliding Distance ◽  
Wear Tests

Titanium and its alloys exhibit a unique combination of physical and corrosion resistance properties which make them ideal materials for space flight engine component such as disks and blades of compressor, marine applications, chemical industries and many bio medical applications. However the use of these materials is limited due to its poor tribological properties. Dry sliding wear tests were performed on Ti-6Al-4V using a pin-on-disc (EN31 steel) configuration. Wear rates were measured with different load and sliding velocity at a constant sliding distance. Microstructures of worn surfaces were characterized by scanning electron microscope (SEM) and energy dispersive spectrometer (EDS).

Description of a New High Resolution Scanning Transmission EM

1972 ◽  
Vol 30 ◽  
pp. 418-419
Author(s):  
Michael Beer ◽  
J. W. Wiggins ◽  
David Woodruff ◽  
Jon Zubin
Keyword(s):  
High Resolution ◽  
Field Emission ◽  
Energy Dispersive Spectrometer ◽  
Scanning Transmission Electron Microscope ◽  
Objective Lens ◽  
Condenser Lens ◽  
Transmission Electron ◽  
Pattern Size ◽  
Scanning Transmission ◽  
Under Construction

A high resolution scanning transmission electron microscope of the type developed by A. V. Crewe is under construction in this laboratory. The basic design is completed and construction is under way with completion expected by the end of this year.The optical column of the microscope will consist of a field emission electron source, an accelerating lens, condenser lens, objective lens, diffraction lens, an energy dispersive spectrometer, and three electron detectors. For any accelerating voltage the condenser lens function to provide a parallel beam at the entrance of the objective lens. The diffraction lens is weak and its current will be controlled by the objective lens current to give an electron diffraction pattern size which is independent of small changes in the objective lens current made to achieve focus at the specimen. The objective lens demagnifies the image of the field emission source so that its Gaussian size is small compared to the aberration limit.

Study of Dry Sliding Wear and Immersion Corrosion on Al 5083 Reinforced With MWCNT, MoB, and Ni

2020 ◽  
Vol 8 (2) ◽  
pp. 38-51
Author(s):  
Sajeeb Rahiman ◽  
Robinson Smart
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Multiwalled Carbon ◽  
Immersion Corrosion ◽  
Alloy Material ◽  
Molybdenum Boride ◽  
Pin On Disc ◽  
Corrosion Behaviors

Dry sliding wear and immersion corrosion behaviors of Al 5083-based hybrid composite reinforced with multiwalled carbon nanotube (MWCNT), Molybdenum boride (MoB) and nickel (Ni) are studied with different weight percentages. The reinforcement weight percentages of MWCNT ranges from 0 to 1.5, that of MoB from 1 to 4 and for Ni from 2 to 8. Dry sliding wear behavior at room temperature is studied using Pin on Disc by varying the sliding distances from 500 to 2000m, load from 10 to 40 N and sliding velocity from 0.25 to 1.75m/s. The wear studies revealed that there is a considerable decrease in wear rate for composites than the alloy material with increase in %wt of reinforcements for all test parameters. The worn surface analysis revealed that there are two types of wear mechanisms namely abrasive and adhesive. The uniform immersion corrosion tests also showed decreasing rate with increase in reinforcements.

Digital x-ray mapping of catalyst particles

1984 ◽  
Vol 42 ◽  
pp. 654-655
Author(s):  
C. E. Lyman
Keyword(s):  
Spatial Resolution ◽  
Energy Dispersive Spectrometer ◽  
Scanning Transmission Electron Microscope ◽  
Polished Section ◽  
Early Application ◽  
X Ray ◽  
Electron Probe Microanalyzer ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Early Maps

Formation of 2-dimensional dot maps of x-ray intensity from various elements in a flat polished section was an early application of the scanning beam electron probe microanalyzer. The spatial resolution of those early maps was the same as the microprobe itself, about lpm. These maps were usually scanned in an analogue fashion, and there was generally enough x-ray signal to produce maps with good peak-to-background ratios. For analysis of individual catalyst particles, a scanning transmission electron microscope (STEM) must be used to obtain the required spatial resolution. However, the x-ray signal level is usually low and is collected with an energy-dispersive spectrometer which has a lower peak-to-background ratio than the wavelength-dispersive spectrometer used in the microprobe. To produce suitable high magnification x-ray maps of catalyst particles digital beam techniques were employed.

scholarly journals Effect of Cd on Microstructure and Dry Sliding Wear Behavior of (Al-12%Si) Alloy

2010 ◽  
Vol 7 (1) ◽  
pp. 1 ◽  
Author(s):  
Muna K. Abbass
Keyword(s):  
Friction Coefficient ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Base Alloy ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Wear Properties ◽  
Hard Particles ◽  
Pin On Disc ◽  
Steel Disc

 The aim of the present research is to study the effect of cadmium addition on microstructure and wear behavior of the alloy (Al-12%Si) under dry sliding conditions. Wear behavior was studied by using the Pin-On- Disc technique under different conditions at applied loads 5-20 N, at constant sliding speed and in constant time. The steel disc hardness was 35HRc. All alloys were prepared with different percentages of cadmium (1.0, 2.0, 3.0) wt%. Also the base alloy was prepared by melting and pouring the molten metal in a metallic mold. It was found that the cadmium addition to Al-Si matrix decreases the wear rate and improves the wear properties for alloys containing -Cd under loads above 10N. It was also found that the alloy Al-12%Si containing 3%Cd is the best alloy in wear resistance and friction coefficient. This is due to presence of the Cd-phase as cuboids or hard particles distributed in a eutectic matrix which reduces the friction coefficient at high loads (20N). 

Dry Sliding Wear Behavior of Wrought Al-12.7Si-0.7Mg Alloy

2021 ◽  
Vol 13 (9) ◽  
pp. 1825-1829
Author(s):  
Fang Liu ◽  
Fuxiao Yu ◽  
Dazhi Zhao
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Hot Extrusion ◽  
Normal Pressure ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Mechanical And Tribological Properties ◽  
Eutectic Si ◽  
Pin On Disc ◽  
Equiaxed Grains

In present paper, the dry sliding wear behaviors of wrought Al-12.7Si-0.7Mg alloy have been investigated using a pin-on-disc machine. The effect of various parameters, such as alloy conditions, sliding speed, and normal pressure, has been investigated. Wear surface was characterized by SEM/EDX microanalysis. The microstructure, hardness and tensile properties of the extruded profile were investigated with the aim of understanding the wear and friction mechanisms. The present results reveal an improvement in the mechanical and tribological properties, obtained due to microstructure characterized by fine Si particles uniformly distributed in the Al matrix of fine equiaxed grains, as promoted by hot extrusion. It was also revealed that higher hardness and the lower aspect ratio of eutectic Si particles contributed to the better wear resistance.

Uniformly distributed nickel nanoparticles created by heating the carbon nanotube

2003 ◽  
Vol 18 (3) ◽  
pp. 604-608 ◽  
Author(s):  
Zaoli Zhang ◽  
Min Gao
Keyword(s):  
Electron Diffraction ◽  
Nickel Nanoparticles ◽  
Arc Discharge ◽  
Energy Dispersive Spectrometer ◽  
Scanning Transmission Electron Microscope ◽  
Face Centered Cubic ◽  
Transmission Electron ◽  
Nickel Particles ◽  
Scanning Transmission ◽  
Face Centered

Uniformly distributed nanoparticles created by heating carbon nanotubes synthesized by arc-discharge were studied by electron diffraction, high-resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), and x-ray energy dispersive spectrometer (EDS). The nanoparticles have diameters in the range of 3–15 nm. Electron diffraction pattern and HRTEM images analysis both show that the nanoparticles can be nickel or diamond. EELS and EDS analysis in a dedicated scanning transmission electron microscope showed that the nanoparticles are face-centered-cubic nickel particles rather than diamond nanocrystals. The mechanism of formation of nickel nanoparticles below its melting point is discussed.

Fiber loading and treatment effects on dry sliding wear of Palmyra fruit fiber composites

2016 ◽  
Vol 23 (2) ◽  
pp. 217-226 ◽  
Author(s):  
Irullappasamy Sankar ◽  
Durairaj Ravindran
Keyword(s):  
Sliding Wear ◽  
Natural Fiber ◽  
Wear Behavior ◽  
Fiber Composites ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Sliding Velocity ◽  
Fiber Loading ◽  
Polyester Composite ◽  
Pin On Disc

AbstractThis study focused on the dry sliding wear behavior of the natural fiber called borassus fruit fiber (Palmyra fruit fiber) reinforced polyester composite. Composites are molded with different fiber weight fractions. Composites are fabricated by using both the untreated and the mercerized fibers. Mercerizations of the fibers are done with 1 N solution. The structural properties like tensile, flexural, and impact strengths are experimented as per ASTM and reported. The dry sliding wear study was done using the Pin-on-Disc apparatus as per ASTM G99. In particular, more emphasis has been devoted for wear behaviors at different velocity conditions and loads. Based on the experimental data, the optimum sliding velocity and the corresponding load were suggested.

The Spatial Distribution of Water in Soap

2001 ◽  
Vol 7 (S2) ◽  
pp. 1168-1169
Author(s):  
A. Aitouchen ◽  
S. Shi ◽  
M. Libera ◽  
M. Misra
Keyword(s):  
Electron Microscope ◽  
Vision System ◽  
Imaging Techniques ◽  
Scanning Transmission Electron Microscope ◽  
Two Phase ◽  
Water Matrix ◽  
Transmission Electron ◽  
Cosmetic Industry ◽  
Scanning Transmission ◽  
Two Phases

Soap bars can be viewed as pseudo-binary two-phase composites consisting of solid particulate suspended in water-enriched medium. Understanding the size and the distribution of the two phases in a bar is of interest to cosmetic industry. Electron Energy Loss Spectroscopy (EELS) combined with Scanning Transmission Electron Microscope (STEM) has been used to perform water mapping in certain biological systems. Here we report preliminary analysis of soap-water matrix in a soap bar by employing EELS and spectrum imaging techniques.Thin slices of soap bars containing 13% water (as measured using Karl Fischer titrator) were frozen using a Leica high-pressure freezer (EM PACT). 200 nm thick cryo-sections were cut at -160°C. The frozen sections were cryo-transferred at -170°C to a Philips CM20 FEG electron microscope equipped with the Gatan CCD spectrometer ENFINA interfaced to an Emispec Vision system for digital control and data acquisition.

Dry Sliding Wear Behavior of WC and Cr-C Coatings on Plain Carbon P/M Steel Substrates Using HVOF Coating Method

2017 ◽  
Vol 735 ◽  
pp. 54-58
Author(s):  
D. Shanmugasundaram ◽  
K. Gunasekaran ◽  
R. Chandramouli ◽  
N. Natarajan
Keyword(s):  
Sliding Wear ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Wear Testing ◽  
Good Effect ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Factors Affecting ◽  
Hvof Coating ◽  
Pin On Disc

The present research paper covers statistical analysis of the major tribological factors affecting the dry sliding wear behavior of Tungsten Carbide (WC) and Chromium Carbide (Cr-C) coatings on plain carbon P/M steel substrate using High Velocity Oxy Flame (HVOF) Coating Technique. Experiments were conducted on pin-on-disc wear testing equipment. The various parameters related to wear such as wear rate, Coefficientof Friction of the coated Disc, Hardness and Surface Roughness were measured.In comparison, WC and Cr-C coating, WC coating has comparably good effect.

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