scholarly journals Influence of Biodestructors on the Wear Resistance of Polyester Geotextile Materials

2019 ◽  
Vol 3 (1) ◽  
pp. 21 ◽  
Author(s):  
Lesya Pelyk ◽  
Volodymyr Vasylechko ◽  
Olena Kyrychenko
Keyword(s):  
Wear Resistance ◽  
Structure And Properties ◽  
Natural Conditions ◽  
Materials Properties ◽  
Nonwoven Materials ◽  
Microbiological Research

Changes in the structure and properties of geotextile nonwoven materials after microbiological load under natural conditions have been studied. Microbiological research of samples was conducted after testing for 12 and 24 months. The results of the research of physical and mechanical materials properties prove their sufficient resistance to the influence of biodestructors.

Investigating formation, structure and properties of coatings based on Cu–Ti alloys

2019 ◽  
pp. 175-181
Author(s):  
A. I. Kovtunov ◽  
T. V. Semistenova ◽  
A. M. Ostryanko
Keyword(s):  
Wear Resistance ◽  
Heat Resistance ◽  
Chemical Compound ◽  
Wear Resistant Coating ◽  
Titanium Coating ◽  
Structure And Properties ◽  
Properties Of Coatings ◽  
Wear Resistant ◽  
Ti Alloys ◽  
Titanium Wire

The paper offers technology of argon-arc surfacing with titanium wire in order to form heat and wear resistant coating based on the titanium cuprides. The influence of surfacing modes on the chemical compound and structure of formed coatings is determined. The wear resistance and heat resistance at 600°C and 800°C were researched for copper–titanium coating with 8–63% titanium.

scholarly journals Improving Properties of Tool Steels by Method of Dynamic Alloying

2019 ◽  
Vol 18 (5) ◽  
pp. 369-379
Author(s):  
A. S. Kalinichenko ◽  
V. I. Ovchinnikov ◽  
S. M. Usherenko ◽  
Javad F. Yazdani-Cherati
Keyword(s):  
Wear Resistance ◽  
High Speed ◽  
Matrix Material ◽  
Amorphous State ◽  
High Speed Steel ◽  
Deep Penetration ◽  
Structure And Properties ◽  
Tool Steels ◽  
Particle Flows ◽  
Dynamic Processing

The influence of high-speed particle fluxes on changes in the structure and properties of materials has been widely studied currently. The effect exerted by particles moving at very high speeds can have both negative (in spacecrafts) and positive character (dynamic processing of tool steels). Therefore a task for studying an effect of high-speed particle flows on structure change in tool steels and improving their performance properties has been set in the paper. The study has used an explosive method for creation of a high-speed flow of SiC + Ni and Al2O3 particles. Samples after dynamic alloying have been subjected to diffusion nitriding. Microstructure of specimens made of X12M, R18, R6M5K5steel has been studied using optical and electron metallography. Wear resistance of the samples has been also tested on a friction machine. Theoretical and experimental results on a complex effect of high-speed microparticle flows and nitriding on a structure and properties of tool steels have been obtained during the research. It has been established that dynamic alloying by particles leads to formation of a specific structure in a composite material reinforced with channels. Central fiber (channel) zone with powder particles residues is surrounded by areas of amorphous state which is succeeded by a zone with a nanocrystalline fragmented cellular structure. Then we observe a zone with a microcrystalline structure that transits to a zone with crystalline structure which is characteristic for a matrix material of structural steel. The obtained data can expand and complement some ideas about mechanisms for dynamic loading of solids and condensed matter, plastic deformation, physical mechanics of structurally inhomogeneous media at different levels, a number of effects arising from collision and ultra-deep penetration of microparticles into metals. It has been shown that wear resistance of high-speed steel subjected to dynamic alloying in the quenched state is increased by 1.2 times in comparison with wear resistance of steel alloyed in the annealing state.

Optimized Materials Properties for Organosilicate Glasses Produced by Plasma-Enhanced Chemical Vapor Deposition

2003 ◽  
Vol 766 ◽  
Author(s):  
M.L. O'Neill ◽  
R.N. Vrtis ◽  
J.L. Vincent ◽  
A.S. Lukas ◽  
E.J. Karwacki ◽  
...  
Keyword(s):  
Vapor Deposition ◽  
Material Properties ◽  
Chemical Vapor ◽  
Film Structure ◽  
Structure And Properties ◽  
Materials Properties ◽  
Precursor Structure ◽  
Processing Platform ◽  
The Relationship ◽  
Organosilicate Glasses

AbstractIn this paper we examine the relationship between precursor structure and material properties for films produced from several leading organosilicon precursors on a common processing platform. Results from our study indicate that for the precursors tested the nature of the precursor has little effect upon film composition but significant impact on film structure and properties.

Influences of RE-Ti Composite Modification on the Structure and Properties of W6Mo5Cr4V2 Alloy

2008 ◽  
Vol 33-37 ◽  
pp. 455-458 ◽  
Author(s):  
Xi Lan Feng ◽  
Zhi Qiang Jiang ◽  
Zhong Yan Hu
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Rare Earth ◽  
Structure Refinement ◽  
Matrix Structure ◽  
Structure And Properties ◽  
Eutectic Carbides ◽  
High Temperature Wear ◽  
The Impact ◽  
Composite Modification

The structural change and properties of W6Mo5Cr4V2 alloy (M2 steel) inoculated by addition of rare earth (RE)-Ti were investigated. The results indicated that the impact toughness and fracture toughness were increased distinctly due to network eutectic carbides elimination, matrix structure refinement, and well-distribution of eutectic carbides. The hardness of modified M2 steel hardly changed. In addition, the high temperature wear resistance was improved.

scholarly journals Effect of Titanium Alloying on the Microstructure and Properties of High Manganese Steel

2019 ◽  
Vol 79 ◽  
pp. 01001
Author(s):  
Wenwei Zhuang ◽  
Haixu Zhi ◽  
Handai Liu ◽  
Daxiang Zhang ◽  
Dongmin Shi
Keyword(s):  
Tensile Strength ◽  
Wear Resistance ◽  
Casting Process ◽  
Steel Sample ◽  
Manganese Steel ◽  
Structure And Properties ◽  
Micro Structure ◽  
High Manganese ◽  
High Manganese Steel ◽  
Scanning Electron

The test used casting process to alloy the traditional high manganese steel with adding Ti. The surface morphology of the high manganese steel sample was observed by the scanning electron microscopy.At the same time, the hardness, the tensile strength and the wear resistance of the sample were tested. Compared with the high manganese steel without alloying, it studied the micro-structure and properties of modified high manganese steel . The results show that the grain of high manganese steel alloyed by titanium alloy is refined, the inclusions is dispersed and their size is reduced. The hardness of high manganese steel is increased by 87 %~263 %, but the tensile strength is reduced. Compared with the sample without added titanium element, the wear resistance of the alloyed high manganese steel is significantly improved.

Effect of Nd on Structure and Properties of Hypereutectic Al-Si Alloys

2012 ◽  
Vol 476-478 ◽  
pp. 105-108
Author(s):  
Bo Gao ◽  
Fei Jiang ◽  
Yi Hao ◽  
Gan Feng Tu ◽  
Lei Chen ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Wear Resistance ◽  
Yield Strength ◽  
Structure And Properties ◽  
Initial Sample ◽  
Primary Si ◽  
Before And After ◽  
Average Size

The influence of Nd on structure and properties of hypereutectic Al-Si alloys (Al-17.5%Si, Al-25%Si) was investigated in this paper. For Al-17.5%Si alloy, there is no obvious variation in morphology of primary Si before and after Nd modification, but the average size of primary Si is decreased from 34.73µm to 23.39µm after 0.3%Nd modification. Compared with initial sample, the tensile strength and yield strength of 0.3%Nd-modified sample are increased by 11.6% and 1.5%, and wear resistance of Al-17.5%Si alloy is enhanced to a factor of 2.1 after 0.3%Nd modification. However, for Al-25%Si alloy, the tensile strength and yield strength of 0.3%Nd-modified sample are respectively improved by 22.1% and 9.5% as compared to initial sample. Meanwhile, wear resistance of modified sample is improved to a factor of 3 relative to initial sample. The property improvement of two alloys can be attributed to the change in morphology and size of primary Si after Nd modification.

Influence of the Structure and Properties OF WC – Co Alloy Powders on the Structure and Wear-Resistance of Detonation Coatings

2004 ◽  
Vol 43 (5/6) ◽  
pp. 258-264 ◽  
Author(s):  
Valerii E. Oliker ◽  
Eugenii F. Grechishkin ◽  
Vsevolod V. Polotai ◽  
Mikhail G. Loskutov ◽  
Izabella I. Timofeeva
Keyword(s):  
Wear Resistance ◽  
Structure And Properties

Influence of Rare Earth on the Properties of H13 Steel by the QPQ Salt-Bath Treatment

2010 ◽  
Vol 97-101 ◽  
pp. 1454-1458 ◽  
Author(s):  
Guang Yao Xiong ◽  
Ming Juan Zhao ◽  
Long Zhi Zhao ◽  
Zhang Jian
Keyword(s):  
Wear Resistance ◽  
Rare Earth ◽  
Sliding Wear ◽  
Salt Bath ◽  
Structure And Properties ◽  
Micro Hardness ◽  
H13 Steel ◽  
Hardness Tester ◽  
Different Content

The structure and properties of H13 steel treated by the QPQ Salt-bath treatment with different content of Rare Earth (RE) LaCO3 were studied. The surface of H13 steel was treated using this method. The microstructure and depth of the treated surface for the steel were analyzed using SEM. The sliding wear resistance was tested on the M-2000 tester and the micro-hardness was tested using 401MVA microscopy hardness tester. The results showed that the thickness and the wear resistance and the speed of nitriding was highly improved and the performance of nitriding layer and the nitriding structure was improved.

scholarly journals STRUCTURE AND PROPERTIES OF THE SURFACE LAYER HIGH CHROME AUSTENITIC STEEL, SUBMITTED TO ION-PLASMA NITROGEN

2020 ◽  
pp. 805-815
Author(s):  
Юрий Федорович Иванов ◽  
Елизавета Алексеевна Петрикова ◽  
Сергей Витальевич Лыков ◽  
Юлия Александровна Денисова ◽  
Олег Сергеевич Толкачев
Keyword(s):  
Wear Resistance ◽  
Surface Layer ◽  
Discharge Plasma ◽  
Low Pressure ◽  
Gas Discharge ◽  
Iron Nitride ◽  
Structure And Properties ◽  
Ion Nitriding ◽  
High Chromium ◽  
Gas Discharge Plasma

Ионное азотирование является одним из наиболее распространенных способов поверхностного упрочнения деталей и инструмента. Цель настоящей работы - выявление и анализ закономерностей преобразования структуры и свойств поверхностного слоя высокохромистой нержавеющей стали, подвергнутой низкотемпературному азотированию в плазме газового разряда низкого давления. Установлено, что насыщение азотом (793 К, 3 час.) аустенитной высокохромистой стали 202318 в плазме газового разряда низкого давления сопровождается формированием в слое толщиной (55 - 60) мкм структуры пластинчатого типа с чередующимися пластинами аустенита и нитрида железа (поперечные размеры пластин не превышают 10 нм), микротвердость и износостойкость которой превышают в 6,5 раз и более чем в 400 раз соответствующие характеристики исходного состояния. Ion nitriding is one of the most common methods of surface hardening of parts and tools. The purpose of this work is to identify and analyze the laws governing the transformation of the structure and properties of the surface layer of high-chromium stainless steel subjected to low-temperature nitriding in a low-pressure gas discharge plasma. It was found that the saturation with nitrogen (793 K, 3 hours) of austenitic high-chromium steel 20X23H18 in a low-pressure gas discharge plasma is accompanied by the formation of a plate type structure with alternating plates of austenite and iron nitride in a layer (55 - 60) µm thick (transverse plate sizes do not exceed 10 nm), the microhardness and wear resistance of which exceed the microhardness of the initial state by 6,5 times, wear resistance - more than 400 times.

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