scholarly journals Microstructures and Wear Resistance of Laser Melting Deposited Composites on Ati-Alloy

2013 ◽  
Vol 22 (2) ◽  
pp. 096369351302200
Author(s):  
Li Peng
Keyword(s):  
Wear Resistance ◽  
Sliding Wear ◽  
Dry Sliding Wear ◽  
Micro Hardness ◽  
Laser Melting ◽  
Laser Technology ◽  
Nanoscale Particles ◽  
Laser Melting Deposition ◽  
First Time ◽  
Scanning Electron

This work is based on the dry sliding wear of Stellite 4-FeSi-B4C composites deposited on a TA10 titanium alloy using a Laser melting deposition (LMD) technique, the parameters of which are such as to provide almost crack-free composites with very low porosity. To our knowledge, it is the first time that Stellite4-FeSi-B4C mixed powders are deposited as the hard composites by the LMD technique. Scanning electron microscope results indicate the nanoscale particles and nanorods are produced in such composites. Furthermore, due to the characteristics of the laser technology, the ultrafine nanoscale polycrystalline phases can be easily produced. Compared with a TA10 alloy substrate, the improvements of the micro-hardness and wear resistance are obtained for such composites.

Microstructures and surface performance of laser melting deposited composites on a Ti alloy

2014 ◽  
Vol 21 (2) ◽  
pp. 159-163 ◽  
Author(s):  
Peng Li
Keyword(s):  
Sliding Wear ◽  
Cyclic Oxidation ◽  
Dry Sliding Wear ◽  
Ti Alloy ◽  
Laser Melting ◽  
Amorphous Phases ◽  
Surface Performance ◽  
Laser Melting Deposition ◽  
First Time ◽  
Scanning Electron

AbstractThis work is based on the dry sliding wear and cyclic oxidation of composites deposited on a TA1 substrate using laser melting deposition (LMD) technique, the parameters of which are such as to provide almost crack-free composites with minimum dilution and very low porosity. To our knowledge, it is the first time that Stellite SF12-Al-FeSi-B4C mixed powders are deposited as hard composites by LMD technique. Scanning electron microscopy results indicate that such composites with metallurgical joint to a TA1 substrate were formed. It is noted that many nanocrystalline/amorphous phases are also produced, which improve the surface performance of such composites. Compared with the TA1 substrate, improvement of cyclic oxidation and wear resistance are obtained for such composites.

PREPARATION, MICROSTRUCTURE AND PERFORMANCE OF NANOSCALE CERAMICS REINFORCED HARD COMPOSITE COATING

2014 ◽  
Vol 21 (01) ◽  
pp. 1450004 ◽  
Author(s):  
PENG LI
Keyword(s):  
Composite Coating ◽  
Laser Cladding ◽  
Sliding Wear ◽  
Rapid Heating ◽  
Dry Sliding Wear ◽  
Nanoscale Particles ◽  
Heating And Cooling ◽  
And Performance ◽  
First Time ◽  
Microstructure And Performance

This paper is based on the dry sliding wear of Stellite SF 12- B 4 C - TiN - Mo composite coating deposited on a pure Ti using a laser cladding technique, the parameters of which provide almost crack-free composites with low porosity. To the best of our knowledge, it is the first time that Stellite SF 12- B 4 C - TiN - Mo mixed powders are deposited as the hard composites by a laser cladding technique. Scanning electron microscope images indicate that the nanoscale particles are produced in such coating. The fact that due to the sufficiently rapid heating and cooling rates of the laser cladding technique, the ceramics, such as TiC or TiB 2 did not have enough time to grow up, resulting in the formation of the nanoscale particles. Compared with a pure Ti substrate, the increments of the micro-hardness and wear resistance are obtained for such composite coating.

IMPROVEMENT IN MICROSTRUCTURE PERFORMANCE OF THE NiCrBSi REINFORCED COATING ON TA15 TITANIUM ALLOY

2012 ◽  
Vol 19 (05) ◽  
pp. 1250047 ◽  
Author(s):  
LI PENG
Keyword(s):  
Wear Resistance ◽  
Titanium Alloy ◽  
Amorphous Alloys ◽  
Sliding Wear ◽  
Rare Earth Oxide ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Micro Hardness ◽  
Amorphous Phases ◽  
Ta15 Titanium Alloy

This work is based on the dry sliding wear of NiCrBSi reinforced coating deposited on TA15 titanium alloy using the laser cladding technique, the parameters of which were such as to provide almost crack-free coatings with minimum dilution and very low porosity. SEM results indicated that a laser clad coating with metallurgical joint to the substrate was formed. Compared with TA15 substrate, an improvement of the micro-hardness and wear resistance was observed for this composite coating. Rare earth oxide Y 2 O 3 was beneficial in producing of the amorphous phases in laser clad coating. With addition of Y 2 O 3, more amorphous alloys were produced, which increased the micro-hardness and wear resistance of the coating.

Effect of Mg2Si Concentration on the Dry Sliding Wear Behavior of Al–Mg2Si Composite

2019 ◽  
Vol 141 (8) ◽  
Author(s):  
Prosanta Biswas ◽  
Manas Kumar Mondal ◽  
Durbadal Mandal
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Wear Resistance ◽  
Optical Microscopy ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Primary Mg2si ◽  
Scanning Electron

The microstructural morphology and wear behavior of as-cast Al–X wt% Mg2Si (X = 0.0, 5.0, 10.0, 15.0, and 20.0) composites were investigated through optical microscopy (OM), energy dispersive X-ray (EDX) spectrometry, scanning electron microscopy (SEM), and field emission scanning electron microscopy (FESEM). The dry sliding wear behavior was studied against an EN 31 hardened steel disk at four different applied loads (19.6 N, 29.4 N, 39.2 N, and 49 N) with a sliding speed of 62.8 m/min for 1 h. The optical microscopy analysis exhibits that the primary Mg2Si particles average equivalent diameter and volume fraction are increased with an increase in Mg2Si (Mg and Si) concentration in the Al–Mg2Si composite. Therefore, the bulk hardness of the composites is increased, whereas the primary Mg2Si hardness decreased because the coarser primary Mg2Si particles have less compactness. The wear resistance of the commercially pure aluminum significantly improved due to Mg2Si reinforcement, and the wear resistance is increased with the increase in Mg2Si concentration up to 15.0 wt% and then decreased at 20.0 wt%. The tested composites worn surfaces and debris exhibit adhesion, delamination, microcutting-abrasion, abrasive- and oxidation-type wear mechanism.

Microstructure and wear resistance of Cuss-toughened Cr5Si3/CrSi metal silicide alloys

2005 ◽  
Vol 20 (5) ◽  
pp. 1122-1130 ◽  
Author(s):  
Y.X. Yin ◽  
H.M. Wang
Keyword(s):  
Solid Solution ◽  
Wear Resistance ◽  
Sliding Wear ◽  
Room Temperature ◽  
Wear Test ◽  
Melting Process ◽  
Dry Sliding Wear ◽  
Metal Silicide ◽  
X Ray Diffraction ◽  
X Ray

Wear-resistant Cu-based solid-solution-toughened Cr5Si3/CrSi metal silicide alloy with a microstructure consisting of predominantly the dual-phase primary dendrites with a Cr5Si3 core encapsulated by CrSi phase and a small amount of interdendritic Cu-based solid solution (Cuss) was designed and fabricated by the laser melting process using Cr–Si–Cu elemental powder blends as the precursor materials. The microstructure of the Cuss-toughened Cr5Si3/CrSi metal silicide alloy was characterized by optical microscopy, powder x-ray diffraction, and energy dispersive spectroscopy. The Cuss-toughened silicide alloys have excellent wear resistance and low coefficient of friction under room temperature dry sliding wear test conditions with hardened 0.45% C carbon steel as the sliding–mating counterpart.

Improving Wear Resistance of AISI 316LN Austenitic Stainless Steel Using Friction Stir Processing

2015 ◽  
Vol 787 ◽  
pp. 421-425
Author(s):  
A. Vignesh ◽  
V.G. Vijay Prakaash ◽  
A.K. Lakshminarayanan
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Austenitic Stainless Steel ◽  
Friction Stir Processing ◽  
Sliding Wear ◽  
Dry Sliding Wear ◽  
Friction Stir ◽  
Pin On Disc ◽  
Metal Microstructure ◽  
Equiaxed Grains

An attempt is made to modify the surface metallurgically and enhance the wear resistance of AISI 316LN austenitic stainless steel using friction stir processing. Friction stir welding tools made up of tungsten based alloy with pin and pinless configuration was used. Fine equiaxed grains were observed in the friction stir processed zone irrespective of tool configuration used. Dry sliding wear resistance was evaluated using pin-on-disc wear tester and it is found that, the friction stir processed zone showed superior wear resistance compared to the base metal. Microstructure, micro hardness, and worn surfaces were used to correlate the results obtained.

Wear Characteristics of Low Temperature Degradation-Free Zirconia/Alumina Composites in a Point Contact Condition

2007 ◽  
Vol 342-343 ◽  
pp. 557-560
Author(s):  
Kwon Yong Lee ◽  
Hwan Kim ◽  
D.W. Kim ◽  
Dae Joon Kim ◽  
Myung Hyun Lee ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Low Temperature ◽  
Bovine Serum ◽  
Sliding Wear ◽  
Point Contact ◽  
Dry Sliding Wear ◽  
Sliding Motion ◽  
Alumina Composites ◽  
Pin On Disk ◽  
Wear Tests

The sliding wear of four different compositions of novel low temperature degradation-free zirconia/alumina (LTD-free Z/A) composites were characterized in a ceramicceramic point contact pair. The wear tests were performed by a pin-on-disk type wear tester in a linear reciprocal sliding motion with a point contact in both dry and bovine serum lubricated conditions at room temperature. For the dry sliding wear tests, AZ-2 (20 vol% (Y,Nb,Ce)-TZP/ 80 vol% Al2O3) showed the best wear resistance among four kinds of LTD-free Z/A composites. For the bovine serum lubricated sliding wear tests, wear was too little to be measured for all kinds of Z/A composites. These novel LTD-free Z/A composites having excellent wear resistance demonstrated a potential as the alternative materials for the ceramic- ceramic contact pairs of femoral head and acetabular liner in total hip replacement.

scholarly journals Effect of Necklace-Type Distribution of SiC Particles on Dry Sliding Wear Behavior of As-Cast AZ91D/SiCp Composites

Crystals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 296 ◽  
Author(s):  
Chao Sun ◽  
Nannan Lu ◽  
Huan Liu ◽  
Xiaojun Wang ◽  
Xiaoshi Hu ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Sliding Wear ◽  
Wear Behavior ◽  
Dry Sliding Wear ◽  
Dry Sliding ◽  
Interface Bonding ◽  
Type Distribution ◽  
Wear Rates ◽  
Sic Particles ◽  
The Matrix

In this study, the dry sliding wear behaviors of SiC particle reinforced AZ91D matrix composites fabricated by stirring casting method were systematically investigated. The SiC particles in as-cast composites exhibited typical necklace-type distribution, which caused the weak interface bonding between SiC particles and matrix in particle-segregated zones. During dry sliding at higher applied loads, SiC particles were easy to debond from the matrix, which accelerated the wear rates of the composites. While at the lower load of 10 N, the presence of SiC particles improved the wear resistance. Moreover, the necklace-type distribution became more evident with the decrease of particle sizes and the increase of SiC volume fractions. Larger particles had better interface bonding with the matrix, which could delay the transition of wear mechanism from oxidation to delamination. Therefore, composites reinforced by larger SiC particles exhibited higher wear resistance. Similarly, owing to more weak interfaces in the composites with high content of SiC particles, more severe delamination occurred and the wear resistance of the composites was impaired.

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