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The Effect of Carbide Morphologies on Elevated

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The Effect of Semi-Solid Parameters on the Microstructure

High chromium cast iron samples of 14% Cr and 24% Cr were produced in sand and permanent mold using semi-solid casting process.A series of experiments were carried out to clarify the effect of copper cooling plate and mold cooling rate on microstructure,particularly morphology and sphericity of primary austenite,hardness and heat treatment cycles.The Effect of Carbide Morphologies on ElevatedWasson and Fuchs (2008) investigated the effect of carbide morphologies on elevated temperature tensile and fatigue behavior of a modified nickel-based single crystal superalloy.(2009) and Wu et The Effect of Carbide Morphologies on ElevatedThe Effect of Carbide Morphologies on Elevated Temperature Tensile and Fatigue Behavior of a Modified Single Crystal Ni-Base Superalloy A.J Wasson1 and G.E.Fuchs1 1University of Florida; P.O.Box 116400; Gainesville,FL 32611,USA Keywords Fatigue,Carbide Morphology,Porosity,Crack Initiation,Single Crystal Superalloys

Synthesis of Silicon Carbide of Different Morphologies and

Leriche A.,Cambier F.(1990) Synthesis of Silicon Carbide of Different Morphologies and the Effect of Second Phase in Ceramic Composites.In Freer R.(eds) The Physics and Chemistry of Carbides,Nitrides and Borides.Surface and Bulk Carbide Transformations in High-Speed This carbide transformation phenomenon has a beneficial effect during forging and therefore it can contribute to the design of future thermo-mechanical processes for high-speed steels.Surface and Bulk Carbide Transformations in High-Speed This carbide transformation phenomenon has a beneficial effect during forging and therefore it can contribute to the design of future thermo-mechanical processes for high-speed steels.

Summary - uliege.be

microstructure explains the formation of different carbide types and morphologies at different deposit depths.This allows reaching a deeper understanding of (1) the effect of the melt superheating temperature and of the thermal cyclic history on carbides solidification,and (2) the effect of the cooling rate on carbide growth.Some results are removed in response to a notice of local law requirement.For more information,please see here.Previous123456NextRetained carbide distribution in intercritically Two 52100 steels,one containing 0.009 pct P,the other 0.023 pct P,were homogenized at 1150 The Effect of Carbide Morphologies on Elevated#176;C,slowly cooled to form proeutectoid carbides and pearlite,partially spheroidized,austenitized at 850 The Effect of Carbide Morphologies on Elevated#176;C for one hour,oil quenched,and tempered at 200 The Effect of Carbide Morphologies on Elevated#176;C.Light microscopy and transmission electron microscopy of carbon extraction replicas showed that cementite particles were retained as three

Microstructure Development in Hot-Pressed Silicon

Silicon carbide is a desirable material for high temperature structural applications because of its light weight and outstanding high temperature mechanical properties (high hardness,high creep resistance,good chemical stability).However,the low fracture toughness of commercial SiC (3~5 MPa.m1/2) has detracted from its widespread applications.Microstructural Modications of As-Cast High-Chromium matrix,the secondary and the primary carbide phases are responsible for the abrasion wear resistance of such alloys,with latter being the most signicant one (Ref 1).Martensitic phases are considered to have a positive effect on the wear resistance,whereas pearlitic/ferritic morphologies generally increase the wear loss (Ref 1-4,6,8).Methods to Classify Bainite in Wire Rod Steel - Ackermann Sep 30,2020 The Effect of Carbide Morphologies on Elevated#0183;ac) Effect of cooling regime in steel shows primarily intermediatetemperature morphologies in regime I (0.3 K s 1 from 400 The Effect of Carbide Morphologies on Elevated#176;C),whereas in regime II (1 K s 1 from 500 The Effect of Carbide Morphologies on Elevated#176;C) and regime III (0.3 K s 1 from 500 The Effect of Carbide Morphologies on Elevated#176;C) hightemperature morphologies dominate the microstructural composition.df) Increasing the manganese content from

Investigation on the Growth of Boron Carbide Nanowires

Simple methods for preparing boron carbide nanowires have been investigated.The methods involve thermal evaporation of C/B/B2O3 powder precursors in an argon atmosphere with or without metal catalysts.High-purity nanowires (50200 nm) were obtained by employing a precursor that has C:B:B2O3 molar ratios of 1:2:1.Less carbon content (C:B:B2O3 = 1:8:4) yielded products exhibitingInfluence of the Nitrogen Content on the Carbide The Effect of Carbide Morphologies on Elevated#0183;Effect of Nitrogen on the Carbide Transformation and Impact Toughness of Annealed Steel.M 2 C-type carbide is metastable and decomposes into M 6 C and MC during forging and annealing of the steel Improvement of Morphology and Free Carrier Mobility Graphene was epitaxially grown on both the C- and Si-faces of 4H- and 6H-SiC(0001) under an argon atmosphere and under high vacuum conditions.Following growth,samples were imaged with Nomarski interference contrast and atomic force microscopies and it was found that growth under argon led to improved morphologies on the C-face films but the Si-face films were not significantly affected.

Hydrothermal Synthesis of Hydroxyapatite with Different

In the present study,hydroxyapatite (HA,Ca5(PO4)3OH) with different morphologies,such as nanorods,microspheres,hexagonal prisms,and hollow flowerlike structure,were synthesized via a facile hydrothermal route by adjusting reaction parameters.The as-synthesized samples were characterized by X-ray diffraction,Fourier transform infrared spectroscopy,scanning electron microscopy,and Fatigue Behavior of Ultrafine-Grained Medium Carbonwe focus on the effect of different carbide morphologies in the initial microstructure on the fatigue behavior after high pressure torsion (HPT) treatment of SAE 1045 steels.The two initial carbide morphologies are spheroidized as well as tempered states.The HPTEffects of process parameters on morphologies of titanium Jan 22,2020 The Effect of Carbide Morphologies on Elevated#0183;Porous ceramics with high specific surface area and high volume fraction of porosity,have attractive properties,such as high temperature resistance,high permeability and high adsorption [1,2].Therefore,they can be widely applied in industries and engineering fields,including filters,absorbers,catalyst carriers and reactors etc [35].Pore structure is a significant factor to evaluate

Effects of process parameters on morphologies of titanium

Jan 22,2020 The Effect of Carbide Morphologies on Elevated#0183;Effects of process parameters on morphologies of titanium carbide powder by thermal plasma treatment Sihui Zeng 1,3 ,Meng Xiao 1,3 ,Xiaoqing Liu 1,3 ,Yaosha Wu 2,3 ,Kefeng Li 4 ,Zhaoguo Qiu 5 5,1,3 and Dechang Zeng 5 5,1,3Effects of polymer matrices to the formation of silicon Effects of polymer matrices to the formation of silicon carbide (SiC) nanoporous fibers and nanowires under carbothermal reduction P.Lu,Q.Huang,A.Mukherjee and Y.Hsieh,J.Effects of High WaterVapor Pressure on Oxidation of Dec 20,2004 The Effect of Carbide Morphologies on Elevated#0183;The oxidation of SiC at 1200 The Effect of Carbide Morphologies on Elevated#176;C in a slowly flowing gas mixture of either air or air + 15 vol% H 2 O at 10 atm (1 MPa) was studied for extended times to examine the effects of elevated watervapor pressure on oxidation rates and microstructural development.At a watervapor pressure of 1.5 atm (150 kPa),distinct SiO 2 scale structures were observed on the SiC; thick,porous,

Effect of withdrawal rate on precipitation characteristics

Jan 01,2021 The Effect of Carbide Morphologies on Elevated#0183;Yu et al.[ 19] discovered four types of MC-type carbide morphologies in the AM3 single crystal superalloy,such as acicular,nodular,blocky,and Chinese script-type.Moreover,the volume fraction and size of carbide increased significantly with an increase in carbon levels.Effect of solidification rate on MC-type carbide Oct 01,2010 The Effect of Carbide Morphologies on Elevated#0183;The solidification rate has a large effect on carbide size and morphology,with higher rates producing finer carbides.Effect of solidification rate on MC-type carbide For the low withdrawing rate,with the increase of withdrawing rate,the carbide size becomes larger.For the case of dendritic interface,the carbide size becomes smaller with refinement of

Effect of carbon addition on carbide morphology of single

Feb 01,2014 The Effect of Carbide Morphologies on Elevated#0183;The solidification rate has great effects on carbide size and morphology with higher-rate produced finer carbides [15 17].Also,some researches have shown the additions of elements would affect the segregation behavior of the constitutive refractory elements,and intentional carbon additions also affect the morphology of carbides.Effect of Porous Carbon Morphologies and Composite Long-cycling performance of LiS batteries was studied with the high-sulfur loading composites composed of 86% sulfur and 14% carbon.The composites are made by the physical mixing and S-liquefied pore-filling processes with nano sulfur powder and two kinds of porous carbons.Effect of Methane Flow Rate on the Microstructural and SiC films were deposited by reactive DC magnetron sputtering of high purity (99.999%) Si target.3 types of substrates,AISI M2 grade high speed steel,glass and Si (100) wafer were used in each deposition.The effect of different CH4 flow rates on the microstructural properties and surface morphologies were characterized by cross-sectional FE-SEM (Field-Emission Scanning Electron Microscope

Effect of Heat Treatment on Microstructure and Stress

The effects of Ti,TiMo,and TiNb microalloy additions on the precipitation strengthening in three experimental high-strength low-alloy steels have been investigated.The objective of this work was to study the carbide precipitation under the conditions of continuous cooling and interrupted cooling.EFFECT OF SILICON ON GRAIN BOUNDARY CARBIDESi.It is concluded that the effect of silicon is via the change of the morphology,amount and distri- bution of the precipitate of the carbides.Silicon accelerates [email protected] formation due to the high solubility of silicon in this type of carbide.Between 0.4-0.6s Si,appreciable amount of continuous platelets ofComparative study on the effects of Cr,V,and Mo carbides Mar 26,2019 The Effect of Carbide Morphologies on Elevated#0183;In this study,the ideal alloying element (among Cr,V,and Mo carbides) to enhance the resistance to hydrogen embrittlement (HE) in a tempered martensitic steel was investigated.Four types of

Cited by 9Publish Year 2015Author Christoph Ruffing,Aaron Kobler,Eglantine Courtois-Manara,Robby Prang,Christian K The Effect of Carbide Morphologies on Elevated#252;bel,Yulia IvanMicrostructural Modications of As-Cast High-Chromium

matrix,the secondary and the primary carbide phases are responsible for the abrasion wear resistance of such alloys,with latter being the most signicant one (Ref 1).Martensitic phases are considered to have a positive effect on the wear resistance,whereas pearlitic/ferritic morphologies generally increase the wear loss (Ref 1-4,6,8).Cited by 9Publish Year 2012Author D.Heydari,A.Alipour Skandani,M.Al HaikThe Effect of Carbide Size,Morphology and CompositionThe Effect of Carbide Size,Morphology and Composition on the Rolling Contact Fatigue Properties of High Speed Steels Bearings Dennis W.Hetzner The Timken Company Canton,Ohio 44706 USA Most bearings for piston-driven aircraft engines and early jet engines were made of through hardening 52100 steel or carburizing grades of alloy steels.Cited by 76Publish Year 2009Author A.E.Karantzalis,A.Lekatou,H.MavrosFocused Ion Beam-Prepared Transmission ElectronSilicon carbide (SiC)-based ceramic matrix composites (CMCs) are utilized for their refractory properties in the aerospace industry.The composition and structure of these materials are crucial to maintaining the strength,toughness,oxidation,and creep resistances that are desired of silicon carbide.This work analyzes the chemical composition of the matrix in batches of SiC/SiC (silicon

Cited by 3Publish Year 2014Author Christoph Ruffing,Eberhard KerscherEffects of process parameters on morphologies of

Effects of process parameters on morphologies of titanium carbide powder by thermal plasma treatment To cite this article Sihui Zeng et al 2019 Mater.Res.Express 6 1265h5 View the article online for updates and enhancements.This content was downloaded from IP address 157.55.39.237 on 09/04/2020 at 01:11Cited by 14Publish Year 2010Author Zhu-huan Yu,Zhu-huan Yu,Lin Liu,Xin-bao Zhao,Wei-guo Zhang,Jun Zhang,Heng-zhi FuEffect of titanium carbide concentration on the morphology Apr 15,2019 The Effect of Carbide Morphologies on Elevated#0183;Thus constitutional undercooling might have existed which could promote the formation of dendritic morphologies.Download Download high-res image (131KB) Download Download full-size image; Fig.6.Effect of dissolved TiC in the molten pool and cooling rate on the MC carbideCited by 13Publish Year 2019Author Ali Dadoo,Seyyed Mohammad Ali Boutorabi,Shahram KheirandishEffect of carbon addition on carbide morphology ofcan be seen in the dendrite.This is because of the high carbon level,and some carbide forming elements have not enough time to form carbides in the interdendritic during the solidification process.Figure 5 shows the carbide morphologies of deep etched sample containing 0.006% C.It can be seen that the sample contains a little carbide.

Cited by 12Publish Year 2014Author Zhu-huan Yu,Lin Liu,Jun ZhangEffect of carbon content on carbide morphology and

Apr 30,2012 The Effect of Carbide Morphologies on Elevated#0183;The effect of chromium carbides different morphologies on the high chromium white cast iron has been investigated,,,.Also the presence of tungsten carbide was reported in the high chromium white cast iron as well.Chi-Carbide in Tempered High Carbon MartensiteMartensite in an Fe-1.22C alloy was tempered at 523,573,and 623 K and examined by transmission electron microscopy (TEM) and M The Effect of Carbide Morphologies on Elevated#246;ssbauer effect spectroscopy (MES) to identify the morphology and type of carbide formed at the beginning of the third stage of tempering.Carbides formed in three morphologies on twins within the martensite plates,in the matrix of twin-free areas of the martensite Chi-Carbide in Tempered High Carbon Martensite - NASA/ADSMartensite in an Fe-1.22C alloy was tempered at 523,573,and 623 K and examined by transmission electron microscopy (TEM) and M The Effect of Carbide Morphologies on Elevated#246;ssbauer effect spectroscopy (MES) to identify the morphology and type of carbide formed at the beginning of the third stage of tempering.Carbides formed in three morphologies on twins within the martensite plates,in the matrix of twin-free areas of the martensite

Carbide Types in Knife Steels - Knife Steel Nerds

Jul 15,2019 The Effect of Carbide Morphologies on Elevated#0183;Here are examples of a small carbide steel with high toughness (AEB-L) and a steel with large carbides and relatively low toughness (D2) AEB-L with a small volume of small carbides.D2 with large carbides.Different Carbide Types.There are many more types of carbides than the basic iron carbides (cementite).Author Sihui Zeng,Meng Xiao,Xiaoqing Liu,Yaosha Wu,Kefeng Li,Zhaoguo Qiu,Dechang ZengPublish Year 2020Transformation from austenite in alloy steels - NASA/ADSThis paper is concerned with the direct transformation of austenite at high temperatures to form ferrite and alloy carbide dispersions.The ferrite/austenite interfaces vary from high energy random boundaries to low energy planar boundaries which grow by step propagation,while the alloy carbide morphologies include a pearlitic form,fine fibers and fine banded arrays of particles.Author Sihui Zeng,Meng Xiao,Xiaoqing Liu,Yaosha Wu,Kefeng Li,Zhaoguo Qiu,Dechang ZengPublish Year 2020Fatigue Behavior of Ultrafine Grained Medium Carbon Steel The main focus of our investigation was the evaluation of the effect of different carbide morphologies in the initial microstructure on the fatigue behavior after high pressure torsion (HPT) treatment of SAE 1045 steel.In our case HPT increased the hardness by a factor of 1.75 - 3.2 compared to the initial states.

Author Sihui Zeng,Meng Xiao,Xiaoqing Liu,Yaosha Wu,Kefeng Li,Zhaoguo Qiu,Dechang ZengPublish Year 2020(PDF) Effect of Co Content and WC Grain Size on Wear

Micro carbide endmills suffer severe abrasive friction and impact wear in high speed milling of graphite.This paper focused on the study of the effect of Co content and WC grain size on the tool Advances in Mechanical Engineering 2017,Vol.9(7) 113 carbide tool under high and even ultra-high cutting speeds,the face end milling experiments of titanium alloy were carried out at small depth of cuts and a low feed rate,ensuring that these values are small enough to contribute less thermal effect at further higher cutting speed levels.The analysis of chip morphologies,chip12345NextImpact of Morphological Effects on the Activity and Fundamental understanding of the effects of phase and exposed facets of transition metal carbide (TMC) catalysts on reactivity is a route to preparing more active and stable materials for targeted applications.In this work,two geometries of tungsten carbide nanomaterials,nanorods,and nanoparticles with different exposed facets were synthesized to investigate the impact of

(PDF) Structural properties of porous 6H silicon carbide

This effect becomes more important as the surface to volume ratio increases and the size of nanocrystallites decreases,and therefore the peak becomes more intense for the morphologies created at higher current densities.ConclusionsWe have shown initial results on the effects of current density and UV illumination on the morphology of porous SiC.(PDF) Fatigue Behavior of Ultrafine-Grained Medium Carbon In this paper,we focus on the effect of different carbide morphologies in the initial microstructure on the fatigue behavior after high pressure torsion (HPT) treatment of SAE 1045 steels.(PDF) Effect of yttrium on morphologies and size of Effect of yttrium on morphologies and size of tungsten carbide particles prepared through CO reduction September 2020 Journal of Materials Research and Technology 9(5):10166-10174

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