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PDF Pinning Effect of Cerium Inclusions during Austenite

The Mechanism of Intragranular Acicular Ferrite Nucleation

The features of inclusion and microstructure for carbon structural steel containing Mg-Al-O inclusions were studied through the scanning electron microscope (SEM) and Energy Dispersive Spectrometer (EDS).It can be seen that,in Mg-Al-O inclusions,the elements of Mn,Si,and S coexist,and their central mole ratio of Mg/Al varies in a wide range.This value for most inclusions is larger than The Effect of Size and Distribution of MnS Inclusions on Aug 31,2017 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The pinning effect of MnS inclusions plays an important role during austenite grain growth,when the austenite grain size exceeds the average spacing of MnS inclusions.The results indicate that large quantities of small MnS inclusions can be used to inhibit austenite grain growth during heating process in a low cost hot forged steel,where Steel Research at University of Science and Technology This research focuses on the effect of oxide inclusions on the nonoriented electrical steel deoxidized by silicon alloy.The increase of the CaO content in inclusions reduces the viscosity of inclusions.When the viscosity of inclusions is lower than that of the steel matrix,inclusions can be deformed and fractured during the hot rolling process,leading to a larger pinning effect on the

Review On the Role of Non-metallic Inclusions in the

The mechanisms of acicular ferrite formation on non-metallic inclusions,such as reduction of interfacial en-ergy,mismatch strain between the inclusion and ferrite/austenite,thermal strains at the inclusions and changes in matrix composition near the inclusions are also discussed.Finally,the effects of inclusionReview On the Role of Non-metallic Inclusions in the The mechanisms of acicular ferrite formation on non-metallic inclusions,such as reduction of interfacial en-ergy,mismatch strain between the inclusion and ferrite/austenite,thermal strains at the inclusions and changes in matrix composition near the inclusions are also discussed.Finally,the effects of inclusionProgress in the Development and Use of Grain Rener2) By contributing to pinning of the grain boundaries,thereby inhibiting austenitic grain growth.To function optimally,the pinning inclusions should have a size below 100nm and be nely distributed.5) 3) By promoting nucleation of intragranular acicular fer-rite during the austenite to

Progress in the Development and Use of Grain Rener

2) By contributing to pinning of the grain boundaries,thereby inhibiting austenitic grain growth.To function optimally,the pinning inclusions should have a size below 100nm and be nely distributed.5) 3) By promoting nucleation of intragranular acicular fer-rite during the austenite toPrevious123456NextEffect of cerium modification on microstructure and May 06,2014 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The atomic radius of cerium is about 58% larger than that of iron,and the cerium atom dissolving in austenite causes lattice distortion,but cerium modification does not change the organizational structure of the material .So cerium modification has little effect on the hardness of the alloy and the hardness increased slightly compared with Pinning Effect of Cerium Inclusions during Austenite The pinning effect of cerium inclusions in the austenite grain growth of SS400 steel at 1300 PDF Pinning Effect of Cerium Inclusions during Austenite#176;C is investigated by using a semi-empirical-simulation.Firstly,steel samples containing cerium inclusions are prepared; then the properties of inclusions are determined using SEM.In situ observation of austenite grain growth is performed by LSCM,to determine the fitting parameters of the model

Pinning Effect of Cerium Inclusions during Austenite

Pinning Effect of Cerium Inclusions during Austenite Grains Growth in SS400 Steel at 1300 C A Combined Phase Field and Experimental Study Zary Adabavazeh,Weng-Sing Hwang * and Amir R.A.Dezfoli Department of Materials Science and Engineering,NationalMicro-structure Refinement in Low Carbon Highation sites and for restraining the austenite grain growth by pinning.Suito et al.reported the pinning effect of oxide par-ticles on austenite grain growth,Ce2O3 and CeS in Fe-C alloy,35) MgO and ZrO 2 in Fe-10%Ni alloy.6) Austenite grain size would be estimated by the equation proposed by Zener7) or Nisizawa et al.,8) which consist of Influence of Ti(C,N) precipitates on austenite growth of Calculations show that the final sizes of austenite grains are 2.155,1.244,0.965,0.847 and 0.686 mm,respectively,under the cooling rate of 1,3,5,7,and 10 PDF Pinning Effect of Cerium Inclusions during Austenite#176;Cs-1,when ignoring the pinning effect of precipitation on austenite growth.Whereas,if taking the pinning effect into consideration,the grain growth remains stable from 1,350

Influence of Ce on the corrosion properties of Fe-Mn-Si

1 day ago PDF Pinning Effect of Cerium Inclusions during Austenite#0183;Among shape memory materials,iron based shape memory alloys are of special interest.Its relative low cost encourages mass scale production,such asIn situ observation of the evolution of intragranular C.-H.Chang et al.[1] and Han S.Kim et al.[16 7] who have studied separately the effect of Mg on the variation of inclusions and microstructures during the solidification of steel after deoxidized by MnSi-Ti.The results - indicated that,with the increasing of Mg,the inclusions were changed as follows Ti2O3(core)+ MnSImproving the Toughness of Heat Affected Zone of Steel Apr 12,2011 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The oxide metallurgy technology with strong deoxidizers is developed in Baosteel.With the pinning effect of fine particles,after welding with highheat input of 400 kJ/cm,the average austenite grain size decreased to 61 PDF Pinning Effect of Cerium Inclusions during Austenite#181;m in HAZ,the average energy absorbed value increased to 142 J for V notch Charpy test at 1653 K.

Grain growth stagnation by inclusions or pores SpringerLink

The mechanism of grain growth stagnation by second-phase particles or pores,also known as Zener pinning,has been analyzed through a variety of theoretical approaches.These range from Zeners original analysis through recent advances made by computer modeling.The Zener phenomenon is routinely utilized in metals and ceramics processing to prevent grain growth and to take full advantageGrain Refinement in Lightweight Advanced High-Strength Apr 15,2016 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;In the following study,a Ce-based inoculant in levels of 0,0.05,and 0.1 wt% Ce was added during the tap and also in-mold to determine the effect of an increasing amount of Ce on reduction in the primary austenite grain size in a Fe-30.5 %Effects of cerium on the compositional variations in and Oct 01,2013 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The various inclusions were analyzed using a FIB milling technique with a TEM.The line profiles of Cr in the various inclusions were measured using an EDS attached to the TEM.3.Results and discussion 3.1.Effects of Ce addition on the distribution of inclusions

Effects of Y and Ti addition on microstructure stability

Aug 01,2019 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;These inclusions could play a role in pinning the austenite grain boundaries based on the Zener pinning force.Gladman had studied the pinning effect of the second phase particles on austenite grain and it could be expressed as D C = d PDF Pinning Effect of Cerium Inclusions during Austenite#175; V 6 f V (3 2 2 Z).Effects of Y and Ti addition on microstructure stability Aug 01,2019 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;These inclusions could play a role in pinning the austenite grain boundaries based on the Zener pinning force.Gladman had studied the pinning effect of the second phase particles on austenite grain and it could be expressed as D C = d PDF Pinning Effect of Cerium Inclusions during Austenite#175; V 6 f V (3 2 2 Z).Effects of Totally 48 Alloying Elements in Steel (Full Element 1 HHydrogen H is the most harmful element in steel,and the solution of hydrogen in steel can cause hydrogen embrittlement and white spots of steel..Like oxygen and nitrogen,the solubility of Hydrogen in solid steel is very low.When mixed into liquid steel in high temperature,it can not escape timely before cooling and accumulates in the organization,forming high-pressure

Effect of precipitates on grain growth in non-oriented

Apr 24,2017 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;Pinning Effect of Oxide Particles on Grain Boundaries of a Low Aluminum Nonoriented Electrical Formation of the sulfide inclusions during the solidification of cast FeMnCS alloys.Mater.Sci. Karasev,A.V.and Suito,H.Effect of particle size distribution on austenite grain growth in Fe0.05 mass% C alloy deoxidized Effect of cerium sulphide particle dispersions on acicular Laser scanning confocal microscopy (LSCM) was used to study the inhibition of austenite grain growth by the inclusions and the effect of cerium on the trend of acicular ferrite (AF) and ferrite Effect of cerium modification on microstructure and May 06,2014 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The atomic radius of cerium is about 58% larger than that of iron,and the cerium atom dissolving in austenite causes lattice distortion,but cerium modification does not change the organizational structure of the material .So cerium modification has little effect on the hardness of the alloy and the hardness increased slightly compared with

Effect of austenitizing temperature on microstructure in

Dec 04,2011 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The change of inclusions and microstructure of 16Mn steel treated by Ce were observed,and the effect of austenitizing temperature on the microstructure was also examined.The results show that the inclusions are transformed from Si-Mn-Al composite oxide and MnS into AlCeO3,Ce2O2S,and MnS composite inclusions after being treated by Ce.Plenty of intragranular ferrites areEffect of aluminium content on the formation of inclusions Jul 24,2020 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The effects of Al and Mn contents on the size,composition,and three-dimensional morphologies of inclusions formed in Fe-xMn-yAl (x = 10 and 20Effect of Ti-based inclusions and acicular ferrite on the Jul 15,2014 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;This phenomenon could be as result of an increase in the volume fraction of Ti-based inclusions and the pinning effect of the oxide nanoparticles.Fig.2(d)(f) shows the optical and SEM micrographs of an austenite grain and the Ti-based inclusions detected in the CGRZ of weld W3.It is obvious that grain boundary allotriomorphic ferrite

Effect of Ti De-oxidation on Solidication and Post

size and inclusion density had to be 0.510mm and 310 104/mm3 respectively in order to adequately control the micro-structure.While it was reported that nonmetallic inclusions have a strong effect on the nucleation of ferrite,the mechanism behind this phenomenon was not estab-lished.6) Particle pinning of austenite grain boundaries duringEffect of Cerium on the Austenitic Nucleation and Growth The influence of small amounts of cerium on the solidification phenomena of S31254 high-Mo austenitic stainless steel was investigated by in situ observations and theoretical calculations.In situ observations indicate that cerium addition in molten steel can accelerate austenitic nucleation but inhibit primary austenite grain growth.The initial nucleation temperature occur 32.3 PDF Pinning Effect of Cerium Inclusions during Austenite#176;C in Effect of Adding Yttrium on the Inclusion Modification and Methods of Analysis Detection of Inclusions.In order to clarify the inclusions in steel samples,10 PDF Pinning Effect of Cerium Inclusions during Austenite#215; 10 PDF Pinning Effect of Cerium Inclusions during Austenite#215; 10 mm 3 cubic samples were cut from sample steel,then ground and polished using 3.5 and 0.5 m diamond compound.The types of inclusions and their morphology were extensively analyzed by scanning electron microscope (SEM) and energy-dispersive spectrometry (EDS) (model ProX).

Effect of Adding Yttrium on the Inclusion Modification and

Methods of Analysis Detection of Inclusions.In order to clarify the inclusions in steel samples,10 PDF Pinning Effect of Cerium Inclusions during Austenite#215; 10 PDF Pinning Effect of Cerium Inclusions during Austenite#215; 10 mm 3 cubic samples were cut from sample steel,then ground and polished using 3.5 and 0.5 m diamond compound.The types of inclusions and their morphology were extensively analyzed by scanning electron microscope (SEM) and energy-dispersive spectrometry (EDS) (model ProX).Effect of Adding Cerium on Microstructure and Morphology May 09,2017 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The effect of adding cerium on microstructure and controlling proper cerium-based inclusions in order to improve properties in low-carbon commercial steel (SS400) were investigated.The type of inclusions can be controlled by changing S/O ratio and Ce content.Without Ce modification,MnS is a dominate inclusion.Effect of Adding Cerium on Microstructure and Morphology May 09,2017 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The effect of adding cerium on microstructure and controlling proper cerium-based inclusions in order to improve properties in low-carbon commercial steel (SS400) were investigated.

Crystals October 2017 - Browse Articles

The pinning effect of cerium inclusions in the austenite grain growth of SS400 steel at 1300 PDF Pinning Effect of Cerium Inclusions during Austenite#176;C is investigated by using a semi-empirical-simulation.Firstly,steel samples containing cerium inclusions are prepared; then the properties of inclusions are determined using SEM.Cited by 2Publish Year 2017Author Zary Adabavazeh,Weng-Sing Hwang,Amir R.A.DezfoliEffect of Cerium on the Behavior of Inclusions in H13 Apr 12,2020 PDF Pinning Effect of Cerium Inclusions during Austenite#0183;The rare earth element Ce has a good modification effect on the spinel [7][8] [9],which can modify the hard oxide inclusions into rare earth inclusions with a12345NextCrystals October 2017 - Browse ArticlesThe pinning effect of cerium inclusions in the austenite grain growth of SS400 steel at 1300 PDF Pinning Effect of Cerium Inclusions during Austenite#176;C is investigated by using a semi-empirical-simulation.Firstly,steel samples containing cerium inclusions are prepared; then the properties of inclusions are determined using SEM.

(PDF) Pinning Effect of Cerium Inclusions during Austenite

Pinning Effect of Cerium Inclusions during Austenite Grains Growth in SS400 Steel at 1300 C A Combined Phase Field and Experimental Study Article (PDF Available) in Crystals 7(10):308 (PDF) Anisotropic Pinning-Effect of Inclusions in Mg-Based MgOMnS is the most effective inclusions for pinning of austenite grain boundaries in Mg-containing SS400,and the ratios of inclusion on austenite grain boundaries to the total inclusion are 43%.

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