effect of hot deformation on phase transformation kinetics

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Abstract The effect of deformation temperature (DT) and thickness reduction on the bainitic structure was investigated under various test conditions by using hot compression on a Gleeble-1500 thermo-mechanical simulation machine,and electron back scattering diffraction (EBSD) technique.In the case of the bainitic structure consisting of granular bainite (GB),lath bainite (LB) and a little The Effect of Hot Deformation Parameters onMay 13,2016 effect of hot deformation on phase transformation kinetics#0183;It appears that the behavior of deformation and transformation of the prior alpha lamellar phase is very complex at this processing temperature.From Figures 4 (a) through (e),it can be noted that some of the lamellar phases have been distorted during hot working and with the increasing strain showed that the break-up of the prior Study of the effect of plastic deformation on the kinetics In the second stage,the kinetics of phase transformation was studied,seeking to understand the effect of heating and cooling conditions on the cooling rate and on the final properties after quenching.In the last step,the plastic behavior on the kinetics of phase transformation,i.e.,the effect of necking on cooling,was studied.

Previous123456NextEffect of Phase Transformation and Latent Heat on Hot

In order to quantify the transformation process and latent heat of non-oriented electrical steel and obtain the deformation resistance in each phase region,the transformation kinetics model,latent heat model and high-temperature deformation constitutive models based on dislocation density theory are established respectively by thermal dilatometric tests,DSC thermal analysis test and hot Phase transformation kinetics in rolled U-10 wt.% Mo foil Here,the effect of sub-eutectoid heat treatment on the phase transformation behavior in rolled U-10 wt.% Mo (U10Mo) foils was systematically investigated.The as-cast 5 mm thick foils were initially homogenized at 900 effect of hot deformation on phase transformation kinetics#176;C for 48 h and were hot rolled to 2 mm and later cold rolled down to 0.2 mm.Kinetic model for phase transformations of proeutectoid The effect of hot deformation on the transformation kinetics is also discussed.AB - A mathematical model for predicting the transformation of proeutectoid steels during continuous cooling and the microstructure after transformation has been developed using time-independent equations of the transformation kinetics.

Kinetic analysis of austenite transformation for B1500HS

Oct 21,2020 effect of hot deformation on phase transformation kinetics#0183;The dilatometric curves of B1500HS high-strength steel at different heating rates were measured by a Gleeble-3800 thermal simulator and analyzed to investigate the effect of heating rate on austenitization.Results show that the value of starting temperature and ending temperature of austenite transformation increase with the rise of heating rates,whereas the temperature interval of austenite Investigation of the Effect of Deformation on Phase The current work has investigated the effect of deformation on the - phase transformation kinetics in the dual phase steel production using the hot rolling scheme.Effects of Austenitization Temperature and Pre-Deformation At low cooling rates,the effect of plastic deformation on the kinetics of phase transformations was indistinct.The combined effect of deformation temperature and strain value on the continuous cooling transformation (CCT) diagram of low-alloy steel with 0.23% C,1.17% Mn,0.79% Ni,0.44% Cr,and 0.22% Mo was studied.

Effect of hot plastic deformation of austenite on the

Apr 25,2007 effect of hot deformation on phase transformation kinetics#0183;Abstract.The influence of hot compressive plastic deformation (effective strain effect of hot deformation on phase transformation kineticsgt;40%) on the decomposition kinetics of austenite into pearlite and martensite in a eutectoid carbon steel has been studied.Dilatometer experiments have been carried out inEffect of hot plastic deformation in the austenite The effect of hot plastic deformation in the austenite interval on the kinetics of transformation and the formation of a ferrite-bainite structure is demonstrated.The specifics of phase transformations under continuous cooling and problems of structure formation afterEffect of hot deformation parameters on flow stress and May 22,2019 effect of hot deformation on phase transformation kinetics#0183;4.2.Effect of hot deformation on final microstructure.The hot deformation of austenite is normally considered to have two opposing effects on the shear phase transformation the promotion effect due to increased nucleation sites and the suppression effect as a result of mechanical stabilization retarding the growth of products [12,13,22].

Effect of hot deformation on phase transformation kinetics

Dec 01,2006 effect of hot deformation on phase transformation kinetics#0183;Although little effect of the hot deformation can be seen on the shape of the TTT diagram (Fig.3b); however,the pearlite and bainite transformations are noticeably promoted by the hot deformation.The nose temperatures of the pearlite and bainite transformation are 650 effect of hot deformation on phase transformation kinetics#176;C and 400 effect of hot deformation on phase transformation kinetics#176;C,respectively,and the incubation periods are about 33 s and 47 s,respectively.Effect of hot deformation on kinetics of [Show full abstract] ferrite (AF) phase transformation.Meanwhile,the hot deformation can increase the phase transformation temperature,and refine the microstructure.Effect of deformation induced transformation of Jan 16,2014 effect of hot deformation on phase transformation kinetics#0183;Metastable -martensite (-Ms) formed during a prior heat treatment of Fe-12Mn steel has been reported to transform into -Ms during subsequent inelastic deformation.This deformation induced phase transformation (DIPT) from -Ms to -Ms has been investigated in the present study within the framework of kinetics relation proposed based upon an internal variable theory of inelastic

Effect of deformation and cooling path on phase

Submit article on deformation effect on bainite/martensite formation Finalize coupled heat conduction phase transformation code Phase transformation code as Abaqus subroutine Collaboration with Joonas Ilmola Olli Leinonen (Hot rolling and phase transformations),Oskari Sepp effect of hot deformation on phase transformation kinetics#228;l effect of hot deformation on phase transformation kinetics#228; (detailed microstructure code),Joni Paananen (weldingEffect of Volume Changes on Hot Rolling Deformation the mixed effect of phase structures,the effect of volume changes on hot rolling deformation behavior should deserve much attention to make up for the deficiency of the exiting rolling models.The researches on the effect of volume changes due to temperature drop and phase transformation on internal stressEffect of V on Hot Deformation Characteristics of TWIP Effect of V on Hot Deformation Characteristics of TWIP Steels. The focus of this work is the characterization of the DRX kinetics of two TWIP steels. Effects of Manganese Content on Solidification Structures,Thermal Properties,and Phase Transformation Characteristics in Fe-Mn-Al-C Steels,Metallurgical and Materials Transactions B,10

Effect of Phase Transformation and Latent Heat on Hot

On the aspect of effect of phase transformation on rolling deformation,the related theoretical research is less,and it is still a hot spot and difficult point in controlled rolling of non-oriented electrical steel.Y.Saito11) converted the effect of phase transformation on the roll force into the effect of phase transformation on the Effect of Phase Transformation and Latent Heat on Hot Due to the high temperature deformation characteristics in dual-phase region is opposite to the austenite or ferrite single phase region,6) and the latent heat is released simultaneously with the phase transformation,the accuracy of roll force prediction is decreased by using the traditional austenitic rolling model in which the influences of microstructure difference and latent heat are neglected,which willEffect of Ni additions and hot deformation on Jul 05,2020 effect of hot deformation on phase transformation kinetics#0183;Additions of 12 Ni (wt.%) and hot deformation on the microstructure and hardness of A356 aged alloy were studied.The results show that the addition of this element generates the formation of Ni 31 Si 12 and NiFe phases with high thermal stability.In addition,the presence of Ni into the Al matrix and precipitates of the second phase affect the precipitation kinetics,transformation sequence,

Effect of Initial State and Deformation Conditions on

effect of hot deformation on phase transformation kinetics#0183;Results show that a pre-deformed sample shows a much lower activation energy and higher kinetic exponent compared with the as-cast sample,which are interpreted based on the deformation induced defects that can promote the nucleation andEffect of Initial State and Deformation Conditions on the Nov 26,2020 effect of hot deformation on phase transformation kinetics#0183;effect of hot deformation parameters on the DRX of alloys.However,results concerning M50NiL steel have rarely been reported.Apart from the hot deformation parameters,the initial state conditions,such as grain size and second phase particles,also have an e ect on DRX; however,they are often neglected.A fewEffect of Hot Deformation on Microstructure,Hardnesscompounds is promoted in a martensitic matrix.In this context,this paper aims to evaluate the effect of hot deformation on microstructure,kinetics and formation of reverted austenite in a C350 maraging steel modified by titanium addition,in order to improve the mechanical properties without addition of alloying elements.

Effect of Hot Deformation and Cooling Rate on Phase

The results show clearly that the kinetics of the austenite decomposition were depended on local equilibrium conditions between recovery,recrystallization and phase transformation processes for a given cooling rate.Bainite transformation was accelerated when sample was cooled after deformation at cooling rate 60 effect of hot deformation on phase transformation kinetics#176;C/s.Effect of Hot Deformation and Cooling Rate on Phase The results show clearly that the kinetics of the austenite decomposition were depended on local equilibrium conditions between recovery,recrystallization and phase transformation processes for a given cooling rate.Bainite transformation was accelerated when sample was cooled after deformation at cooling rate 60 effect of hot deformation on phase transformation kinetics#176;C/s.Effect of Hot Deformation and Cooling Rate on Phase Download Citation Effect of Hot Deformation and Cooling Rate on Phase Transformations in Low Carbon HN5MVNb Bainitic Steel Deformations at temperatures 900 effect of hot deformation on phase transformation kinetics#176;C,860 effect of hot deformation on phase transformation kinetics#176;C,810 effect of hot deformation on phase transformation kinetics#176;C and 780 effect of hot deformation on phase transformation kinetics#176;C in

Effect of Deformation Parameters on Microstructural

Samuel [13] investigated the phase transformation kinetics in ductile iron by using a Gleeble machine that was to estimate the CCT curve for 65-45-12 ductile iron.Moreover,Zaho [14] [15] [16] applied a new severe plastic deformation process on ductile iron and studied the graphite morphology after applying a hot compression test on ductile Dilatometric Analysis of the Austenite Decomposition in Nov 29,2020 effect of hot deformation on phase transformation kinetics#0183;Deformation strongly inuences the phase transformation kinetics [10,11],which is caused by the change in a state of microstructure.Undergoing deformation,the dislocation density in austenite increases leading to a higher preferential ferrite/bainite nucleation sites,such as grainCited by 75Publish Year 2014Author Ke Hua,Xiangyi Xue,Hongchao Kou,Jiangkun Fan,Bin Tang,Jinshan LiEffect of hot plastic deformation in the austenite May 02,2007 effect of hot deformation on phase transformation kinetics#0183;INTRODUCTION ship-building and pipe steels,requires an investigation of phase transformations after hot plastic deformation in these Preliminary hot plastic deformation in the austenite inter- steels.val has a significant effect on phase transformations in con- The purpose of the present study is to determine the re- tinuous cooling and,consequently,on the formation of the fi- gularities of phase and structural transformations

Cited by 17Publish Year 2006Author Furen Xiao,Bo Liao,Guiying Qiao,Shuzhe GuanEffect of hot deformation on phase transformation kinetics

Hot deformation increased the transformation start temperature Ar3 significantly,enlarged the polygonal ferrite transformation temperature range,and shortened the gestation period of pearlite Cited by 13Publish Year 2019Author Liangyun Lan,Wei Zhou,R.D.K.MisraEffects of Austenitization Temperature and Pre-Deformation Nov 13,2020 effect of hot deformation on phase transformation kinetics#0183;The major effect of the previous plastic deformation should be the displacement of the phase transformations to higher temperatures and shorter times.This is caused by the increased diffusivity of elements in the deformed austenite and a higher density of the favored nucleation places for the diffusional transformation products.Characterization of hot deformation microstructure of a Dec 05,2014 effect of hot deformation on phase transformation kinetics#0183;The microstructure evolution during hot deformation of Ti-5553 alloy was studied. The kinetics of phase transformation was accelerated by the deformation. The mechanism of phase globularization was described by phase wedges model. Hot deformation changed the strict Burgers-relationship between and phase.

12345NextEffect of Hot Deformation Processes on Phase

The conditions during hot deformation have a critical influence on the phase transformation,i.e.,they change the order of the phase transformations by promoting or suppressing certain phasetransformation types.This causes different phasetransformation types to predominate and results in different steel microstructures.(PDF) The effect of stress triaxiality on the phase Sep 22,2020 effect of hot deformation on phase transformation kinetics#0183;The effect of stress triaxiality on the phase transformation in transformation induced plasticity steels Experimental investigation and modelling the transformation kinetics(PDF) Effect of Double Hit Hot Deformation on the Effect of double hit hot deformation on the evolution of dynamically transformed ferrite K.Chadha 1* ,C.Jr.Aranas 2 ,M.Jahazi 3 1 Planetary and Space Science Centre,University of New Brunswick

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