Effect of Carbon Content on Microstructure, Mechanical Properties and Wear Resistance of Ti(C,N)-Based Cermets

2014 ◽  
Vol 697 ◽  
pp. 41-45 ◽  
Author(s):  
Hai Long Wei ◽  
Hai Yan Lei ◽  
Guo Xiong Zhong ◽  
Hai Zhou Yu ◽  
Ping Feng
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Weight Loss ◽  
Wear Resistance ◽  
Carbon Content ◽  
Wear Debris ◽  
Hard Phase ◽  
Wear Weight Loss ◽  
Minimum Wear

Ti(C,N)-based cermets with three carbon contents are prepared by sintering in vacuum. The effects of carbon content on the microstructure, mechanical properties and wear resistance of Ti(C,N)-based cermets were investigated. The results show that the grains refine gradually and the hard phase core becomes smaller when the carbon contents increases. The mechanical properties closely relates to the carbon content. With the increase of carbon content, the furrows created by grains cutting are getting narrower and more intensive. When the carbon content reaches 0.8%, a large quantity of wear debris bonding blocks are attached on the wearing surface. In this condition, the Ti(C,N)-based cermets are of the minimum wear weight loss and the best comprehensive mechanical property.

Analysis of Wear-Resistant Materials of Mixer - Pneumosuperchargers Blades Operating under Conditions of Abrasive Wear

2021 ◽  
Vol 316 ◽  
pp. 893-898
Author(s):  
Natalya Gabelchenko ◽  
Artem Belov ◽  
Artem Kravchenko ◽  
Oleg Kryuchkov
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Wear Resistance ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Abrasive Medium ◽  
Wear Resistant ◽  
Comparative Tests ◽  
Before And After ◽  
110G13l Steel

We conducted comparative tests of the wear resistance of metals operating under abrasive conditions. Samples were cut from the working parts of mixer-pneumosuperchargers. The chemical composition and mechanical properties were determined. To compare samples under abrasive wear conditions, we designed and assembled a carousel installation. The principle of its operation is based on mixing the abrasive medium by the samples being studied with a given speed. Wear resistance was evaluated by weight loss by samples after several test cycles. To determine changes in the structure of the metal during abrasive wear, metallographic studies of the samples were carried out before and after the tests. It is shown that the best complex of service and mechanical properties is possessed by 110G13L steel.

scholarly journals Al 5251-based hybrid nanocomposite by FSP reinforced with graphene nanoplates and boron nitride nanoparticles: Microstructure, wear, and mechanical characterization

2021 ◽  
Vol 10 (1) ◽  
pp. 1752-1765
Author(s):  
Essam B. Moustafa ◽  
A. Melaibari ◽  
Ghazi Alsoruji ◽  
Asmaa M. Khalil ◽  
Ahmed O. Mosleh
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Wear Resistance ◽  
Boron Nitride ◽  
Grain Refinement ◽  
Friction Stir ◽  
Pinning Effect ◽  
Mean Grain Size ◽  
Superior Mechanical Properties ◽  
Graphene Nanoplates

Abstract The strength and wear resistance of aluminium alloys must be improved to enhance their usage in lightweight constructions. Thus, in this study, graphene nanoplates (GNPs) and boron nitride (BN) nanoparticles were reinforced into the Al 5251 aluminium alloy by friction stir processing (FSP). The Al 5251 aluminum alloy sheets were patterned with holes and filled by mono GNPs, mono BN nanoparticles and a hybrid of BN nanoparticles and GNPs. The microstructure, wear, and mechanical properties of the as-received, after FSP, and the manufactured surface nanocomposites were analysed. Wear tests were performed using two methods: weight loss and volume loss methods. FSP led to four times grain refinement. Due to the Zener pinning effect, the reinforcement nanoparticles improved the grain refinement effect by seven times decrease in the mean grain size. The wear rate by volume and weight loss with reinforcing BN nanoparticles decreased by 160 and 1,340%, respectively. Note that the GNP reinforcement insignificantly improved the wear resistance and hardness compared with the BN nanoparticles. The hardness was increased by 50, 120, and 80% by reinforcing the Al 5251 alloy with GNPs, BN, and a hybrid of BN nanoparticles and GNPs, respectively. The nanocomposite reinforced with GNPs exhibited superior mechanical properties compared to the other nanocomposites.

America’s First Polymer Scientists: Rubber Processing, Use and Transport in Mesoamerica

2011 ◽  
Vol 22 (4) ◽  
pp. 469-486 ◽  
Author(s):  
Michael J. Tarkanian ◽  
Dorothy Hosler
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Wear Resistance ◽  
Sixteenth Century ◽  
Volume Ratio ◽  
Morning Glory ◽  
High Wear Resistance ◽  
Rubber Ball ◽  
Aztec Empire

AbstractAncient Mesoamericans were making rubber by at least 1600 B.C, mixing latex from Castilla elastica trees with juice from Ipomoea alba (morning glory) vines. The combination of ethnographic, archaeological and mechanical data presented in this text illustrate that ancient Mesoamericans had fully developed this process, and consciously tailored the mechanical properties of rubber to suit requirements of specific applications by altering the ratio of latex to I. alba juice. Our data focus on rubber balls, sandal soles, and rubber bands for hafting and joining. Elasticity, the mechanical property that defines the ability of a rubber ball to bounce, is maximized with a 1:1 volume ratio of latex to I. alba juice. Rubber with high wear resistance, vital to the life and functionality of a sandal sole, can be created by mixing C. elastica latex with 25 percent I. alba juice by volume. Unprocessed C. elastica latex, without I. alba juice, is the material best suited for joining applications, such as adhesives or hafting bands, where strength and ability to absorb shock is of the greatest importance. Tribute data from sixteenth-century codices substantiate that rubber was processed for specific applications within the Aztec empire—rubber and latex goods were processed and constructed in the C. elastica-bearing regions, and then shipped to the capital for use or further distribution.

The Wear Behavior of Pulse Current Electroforming Ni-P-SiC Composite Coatings

2007 ◽  
Vol 364-366 ◽  
pp. 358-363 ◽  
Author(s):  
Kung Hsu Hou ◽  
Ming Chang Jeng ◽  
Yung Kang Shen ◽  
Ming Der Ger
Keyword(s):  
Weight Loss ◽  
Wear Resistance ◽  
Pulse Current ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Wear Weight Loss ◽  
Sic Particles ◽  
The Coefficient Of Friction ◽  
Worn Surface ◽  
The Relationship

In this study, the SiC particles with a mean diameter of 300nm were used to be codeposited with Ni-P base to produce Ni-P-SiC composite coatings by means of the pulse current electroforming technology. The relationship between the SiC particles and phosphorous contents in the composite coatings has been constructed. The wear behavior of the Ni-P-SiC composite coatings was examined by that measurements data including the wear weight loss, the coefficient of friction, and the temperature increments under the wear tests, in which were correlated to the observation and analysis of the worn surface of the composite coatings. Experimental results show that the wear resistance of Ni-P-SiC composite coatings is superior to Ni-P composite coatings, if they are under the same level of hardness. In addition, the wear weight loss of Ni-P-SiC composite coatings is even about 62% less than that of Ni-P composite coatings, if they are based on the same production conditions. Further more, both the hardness and wear resistance of Ni-P-SiC composite coatings are superior to pure Ni coating, wherein its wear resistance is even up to 10 times better than that of pure Ni coating.

Influence of Carbon Content in Cobalt-Based Superalloys on Mechanical and Wear Properties

2004 ◽  
Vol 126 (2) ◽  
pp. 204-212 ◽  
Author(s):  
Rong Liu ◽  
Matthew X. Yao ◽  
Xijia Wu
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Carbon Content ◽  
X Ray Diffraction ◽  
Wear Properties ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Pin On Disc ◽  
Rotating Bending ◽  
The Impact

Two cobalt-based superalloys containing 1.6% and 2% carbon respectively were studied, with the emphasis on the influence of the carbon content on their microstructures, wear resistance, and mechanical properties. Phase formation and transformation in the microstructures were analyzed using metallographic, X-ray diffraction, and differential scanning calorimetry techniques. Wear resistance, tensile and fatigue behaviors of the alloys were investigated on a pin-on-disc tribometer, MTS machine and rotating-bending machine, respectively. It is found that the wear resistance was increased significantly with the carbon content. The mechanical properties of the alloys are also influenced by the carbon content, but the impact is not so significant as on the wear resistance. It was observed that the carbon content increased the yielding strength and fatigue strength, but decreased the fracture stress and fracture strain.

Effects of Shape and Distribution of M7C3 on Wear Resistance of Iron Based Composite

2008 ◽  
Vol 373-374 ◽  
pp. 560-563 ◽  
Author(s):  
Zheng Jun Liu ◽  
Yun Hai Su ◽  
J.G. Sun
Keyword(s):  
Wear Resistance ◽  
Arc Welding ◽  
Electromagnetic Stirring ◽  
Plasma Arc Welding ◽  
Hard Phase ◽  
Applied Current ◽  
Wear Weight Loss ◽  
Maximum Value ◽  
Deposited Metal ◽  
Wear Tests

Effects of shape and distribution of the hard phases (Fe, Cr)7C3 and Cr7C3 on wear resistance of Fe5 deposited metal obtained by plasma arc welding with electromagnetic stirring were investigated. The deposited layers were subsequently characterized by SEM observation, wear tests and hardness measurements. The hardness of the deposited layers was increased and then decreased with increasing the applied current. With the current of 3 A and the electromagnetic frequency of 10 Hz, the hardness of deposited metal reached maximum value of about HRC 68, which was increased about 19% compared with that of the deposited metal without electromagnetic stirring. The wear weight loss of the deposited metal with 3 A and 10 Hz is greatly decreased. It is confirmed that the shape and the distribution of hard phase significantly affect wear resistance of the deposited metal. The slag M7C3 is transformed into hexagon during electromagnetic stirring with 3 A and 10 Hz. And the regular distribution of hexagon M7C3 in the deposited metal resulted in the excellent wear resistance.

Study on Irradiation Cross-Linking Modification and Biodegradability of Poly (Butylene Succinate)

2015 ◽  
Vol 1089 ◽  
pp. 172-177
Author(s):  
Hui Liu ◽  
Qiang Li ◽  
Cheng Zhi Chuai ◽  
Zhe Wang
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Weight Loss ◽  
Loss Rate ◽  
Cross Linking ◽  
Weight Loss Rate ◽  
Butylene Succinate ◽  
Melt Strength ◽  
Biodegradable Properties

The pure PBS material has been taken irradiation cross-linking modification in order to improve the melt strength of PBS. The mechanical properties, sanitation performance and biodegradable properties of the modified PBS were investigated. The results showed that the modified PBS has fine hygiene performance. The mechanical property increased, but it reduced rapidly after put into the specific soil. The weight loss rate of PBS reached 50.86% after degradation in humus for 56 days.

scholarly journals Structural and Mechanical Properties of a-BCN Films Prepared by an Arc-Sputtering Hybrid Process

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 719
Author(s):  
Yuki Hirata ◽  
Ryotaro Takeuchi ◽  
Hiroyuki Taniguchi ◽  
Masao Kawagoe ◽  
Yoshinao Iwamoto ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wear Resistance ◽  
Friction Coefficient ◽  
Carbon Content ◽  
Photoelectron Spectroscopy ◽  
High Hardness ◽  
Film Structure ◽  
Hybrid Process ◽  
High Wear Resistance ◽  
Wear Volume

Amorphous boron carbon nitride (a-BCN) films exhibit excellent properties such as high hardness and high wear resistance. However, the correlation between the film structure and its mechanical properties is not fully understood. In this study, a-BCN films were prepared by an arc-sputtering hybrid process under various coating conditions, and the correlations between the film’s structure and mechanical properties were clarified. Glow discharge optical emission spectroscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, and Raman spectroscopy were used to analyze the structural properties and chemical composition. Nanoindentation and ball-on-disc tests were performed to evaluate the hardness and to estimate the friction coefficient and wear volume, respectively. The results indicated that the mechanical properties strongly depend on the carbon content in the film; it decreases significantly when the carbon content is <90%. On the other hand, by controlling the contents of boron and nitrogen to a very small amount (up to 2.5 at.%), it is possible to synthesize a film that has nearly the same hardness and friction coefficient as those of an amorphous carbon (a-C) film and better wear resistance than the a-C film.

Effect of Al2O3 nanoparticle reinforcement on the mechanical and high-temperature tribological behavior of Al-7075 alloy

2016 ◽  
Vol 231 (7) ◽  
pp. 900-909 ◽  
Author(s):  
Yaping Bai ◽  
Yongchun Guo ◽  
Jianping Li ◽  
Zhong Yang ◽  
Jia Tian
Keyword(s):  
Mechanical Properties ◽  
Mechanical Property ◽  
Wear Resistance ◽  
High Temperature ◽  
Tribological Behavior ◽  
High Temperature Wear ◽  
Al 7075 ◽  
Al2o3 Nanoparticle ◽  
7075 Alloy ◽  
Hot Pressing Sintering

In this paper, Al2O3/7075 composites were prepared by mechanical alloying with subsequent hot-pressing sintering, and the effect of Al2O3 nanoparticle on the mechanical and tribological behavior of 7075 was studied. The mechanical property results showed that the hardness and compressive strength of Al2O3/7075 composites first increased and then decreased with Al2O3 amount increasing, and 5 wt.% Al2O3 addition made the material exhibit excellent comprehensive mechanical properties. The tribological properties also indicated that 5 wt.% Al2O3 nanoparticle significantly improved the high-temperature wear resistance of 7075 alloys. Thus, all the mechanical and tribological results confirmed that the addition of Al2O3 nanoparticle was a better strengthening way for 7075 alloys at high temperatures.

Preparation and Tribological Behavior of Ni-P-B4C Electroless Coatings

2014 ◽  
Vol 809-810 ◽  
pp. 615-620
Author(s):  
Ying Wang ◽  
Wan Chang Sun ◽  
Hui Cai ◽  
Qing Hao Yang ◽  
Ju Mei Zhang
Keyword(s):  
Wear Resistance ◽  
Composite Coating ◽  
Tribological Behavior ◽  
Composite Coatings ◽  
Micro Hardness ◽  
Wear Weight Loss ◽  
Heat Treated ◽  
Electroless Coatings ◽  
Electroless Ni ◽  
Minimum Wear

In this research, micro-hardness and wear resistance of two types of electroless coatings were investigated including Ni-P and Ni-P-B4C composite coatings. Dispersible B4C particles and electroless Ni-P alloy were codeposited on carbon steel by electroless plating and then heat treated at 200, 400 and 600 °C for 1 h, respectively. The cross-section morphology and microstructure of the composite coatings were characterized. Meanwhile, the micro-hardness and tribological behavior of composite coatings were evaluated. The results showed that the Ni-P-B4C composite coating presents better wear resistance in comparison with that of Ni-P coating. The Ni-P-B4C composite coating with heat treated at 400 °C exhibits high micro-hardness and good wear resistance, which the highest hardness is 1200 HV, the minimum wear weight loss is 0.12 mg and the lowest friction coefficient is 0.2054.

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