o examine the austenite grain growth behavior and kinetics under isothermal austenitization process in a low alloy medium carbon forged steel,heat treatments at different temperatures (1150,1175 results for this questionWhat ' s The difference between grain growth and coarsening?What ' s The difference between grain growth and coarsening?Coarsening and grain growth both refer to the parasitic surface energy driven evolution of a system of particles to larger mean sizes.Coarsening refers to the evolution of a system of precipitate particles embedded in a matrix.In grain growth the particles abut one another and are not separated by a matrix phase.PRECIPITATE COARSENING AND GRAIN GROWTH IN STEELS results for this questionWhat is grain growth paper?What is grain growth paper?In grain growth the particles abut one another and are not separated by a matrix phase.This paper deals with grain growth in austenite and ferrite and the coarsening of compound precipitates.The latter include both temper carbides and other compounds used in strengthening and in control of grain size in austenite and ferrite.PRECIPITATE COARSENING AND GRAIN GROWTH IN STEELS
Investigating the growth laws of austenite and establishing the mathematical model to predict grain growth behavior under different temperatures and holding times are thus necessary .More (PDF) Effect of Cold-Deformation on Austenite Grain Growth Prior austenite grain structures of the solution-treated (ST) specimens after annealing at (a) 1298 K for 1800 s,(b) 1323 K for 60 s,(c) 1323 K for 1800 s,and (d) 1423 K for 1800 s.(PDF) Grain growth behavior of blade steel KT5331 for ·Translate this pageThe austenite grain growth behavior of KT5331 steel and the effect of precipitates on the austenite grain growth were studied by isothermal austenization at 950-1280.
Abstract.The 20CrMnTiH gear steel was heated at temperature range from 850°C to 1250°C and.at holding time range from 0s to 480s to obtain the law of austenite grain growth by using.Gleeble A NEW VIEW OF THE GRAIN-COARSENING BEHAVIOR2.2.4 Austenite Grain Size Prediction Models for Microalloyed Steels .14 2.2.5 Estimation of Pinning Force and Driving Force for Grain Growth ..17 2.3 SEAMLESS LINE PIPE STEEL GRADE MANUFACTURING ..19 2.4 AUSTENITE GRAIN COARING WELDING SENING MECANISMS DURA Study of Growth of Austenite Grains in a Steel May 26,2017·The growth of austenite grains and the dissolution of carbonitrides under heating of a structural steel microalloyed with niobium and titanium are studied.The microstructure of the steel is investigated with the help of light and transmission electron microscopes.The content of elements in precipitated particles is determined using an energy dispersive spectrometer.
SCIENTIFIC REPORTS ã 3968 DI1.13s415-1-431-1 naturescientificreports A new study on the growth behavior of austenite grains during heating processes DongAustenite Grain Growth - an overview ScienceDirect TopicsThe observed grain growth behavior is a representative example for austenite grain growth in low-carbon steels.Grain growth rates increase with reheat temperature.At each individual temperature,an initial period of comparatively rapid growth precedes a second stage where the grain size changes very little,and a limiting grain size is Austenite Grain Growth Behavior of X80 Pipeline Steel in Mar 01,2010·Because the initial average grain size Do is smaller than the average grain size after solid solution treatment and soaking time are equal in the research,approximate Issue 3 Austenite Grain Growth Behavior of X80 Pipeline Steel in Heating Process 65 relation between average grain size and soaking temperature can be expressed by following
carbonitrides to suppress grain growth and provide resistance to austenite grain coarsening.[2,49] This study investigates the eectiveness of both molybdenum (Mo) additions and thermal processing to increase the coars-ening resistance of Nb-rich precipitate distributions in austenite and delay the associated onset of abnormal grain growth.Austenite grain growth and hot deformation behavior in a Nov 01,2020·To examine the austenite grain growth behavior and kinetics under isothermal austenitization process in a low alloy medium carbon forged steel,heat treatments at different temperatures (1150,1175,1200,and 1260 °C) and times (5,15,and 25 min) were conducted.Austenitic Grain Growth behavior Immediately afterAustenitic grain growth behavior after static recrystallization was also inves-tigated using 0.09C2.26Ni steel.Hot compression was conducted at strain rate of 1 10s 1 and the strain of 0.69,and other thermo-mechanical cycles were the same with the
austenite grain sizeprior austenite grain sizeaustenite grain boundaries12345NextAuthor W.Fang,C.Zhang,F.Gou,B.Jiang,Y.LiuPublish Year 2020Austenitic Grain Growth Behavior during Austenization in In addition,the kinetic equations of austenite grain growth in both steels are proposed.The calculated grain growth exponents are n = 0.33 and n = 0.35,and the activation energies of grain growth are Q = 1.51 × 10 5 J mol 1 and Q = 1.85 × 10 5 J mol 1 for 0Al and 1.1Al,respectively.Author Zhen-bao Liu,Xin Tu,Xiao-hui Wang,Jian-xiong Liang,Zhi-yong Yang,Yong-qing Sun,Chang-jun WangPublish Year 2020Austenite Grain Growth Behavior after Recrystallization In this study,a predictive model was developed to estimate the austenite grain growth behavior after recrystallization during hot rolling of microalloyed low-carbon steels.The features of the model are as follows the solute drag effect of not only niobium (Nb) but also molybdenum (Mo) was assessed,
austenite grains would cause the brittleness of steel.Besides,the ultrasonic inspection of the grain size is too dif-ficult to carry out under such circumstance.2) Therefore,it is necessary to study the austenite grain growth behavior so as to obtain desirable austenite grain size.It is well known that small amounts of alloying elementsCited by 112Publish Year 2011Author S.S.Zhang,M.Q.Li,Y.G.Liu,J.Luo,T.Q.LiuA new study on the growth behavior of austenite grains Jun 21,2017·Austenite grain growth behavior of steel 33Mn2V designed for oil well tubes.Acta Metall.Sinica 39,699703 (2003).CAS Google Scholar 16.Uhm,S.et al.Prediction model for the austenite Cited by 14Publish Year 2015Author Charles M.Enloe,Kip O.Findley,John G.Speer Effect of Austenite Grain Size on the Fatigue Crack The effect of austenite grain size on the fatigue crack growth and arrest behavior of carburized steel was studied.On the fatigue test of same stress amplitude,the fatigue crack initiation of fine austenite grain steels is delayed in comparison with coarse austenite grain steels,but the difference of crack initiation life between fine grain steels and coarse grain steels is very slight
study on grain growth behavior is essential for deter-mining the austenitizing temperature.Austenite grains in carbon steels grow gradually as temperature increases. Sellars et al. have proposed a mathematical model for describing the austenite grain growth ofCited by 26Publish Year 2014Author Geng-wei Yang,Geng-wei Yang,Xin-jun Sun,Qi-long Yong,Zhao-dong Li,Xiao-xian LiThe Effects of Heating Rate on Austenite Grain Growth ingrowth,6,7) increases austenite grain growth,8,9) or results in a decrease in the rate of austenite growth.8) Some studies have reported different responses in a single steel.For ex-ample,Sheard and Nutting,9) in a study on a high purity FeC alloy with 0.47wt% carbon heated to 795°C,found that increasing the heating rate reduced Cited by 28Publish Year 2014Author Xiang-liang Wan,Kai-ming Wu,Gang Huang,Ran Wei,Lin ChengResearchArticle Austenite Grain Growth Behavior of AISI Austenite grain growth behavior of X80 pipeline steel in 10.1155_2013-762890.pdf Author Akhtar.ali Subject Advances in Mechanical Engineering Created Date 1/9/2015 7:29:35 PM
·Translate this pageAug 01,2014·Corresponding with the precipitation behavior of (Ti,V)C with temperature,the growth behavior of austenite in the vanadium microalloyed steel could be divided into two regions.At lower reheating temperature,austenite grains grew slowly,and ultra-fine grained austenite smaller than 5 m was successfully obtained.Cited by 3Publish Year 2020Author A.Chamanfar,S.M.Chentouf,M.Jahazi,L.-P.Lapierre-BoireAustenite Grain Growth Behavior after Recrystallization In this study,a predictive model was developed to estimate the austenite grain growth behavior after recrystallization during hot rolling of microalloyed low-carbon steels.The features of the model are as follows (1) the solute drag effectCited by 4Publish Year 2017Author H.L.Yang,G.Xu,L.Wang,Q.Yuan,B.HeCarbonitride Dissolution and Austenite Grain Growth in a 4.3.Austenite Grain Growth Behavior.When the initial austenite grains are fine and uniform,the grain boundary area would be large and leads to a high total interfacial energy.From the thermodynamics point of view,the higher interfacial energy leads to the more unstable interface and tends to be lowered through the coalescence of fine grains.
3.2.Grain growth behavior in the -phase After the transformation was completed,austenite grains continued to grow during the simulated thermal cycle.Figs.46 show typical in situ images of the grain growth behavior in the -phase in 0.012wt% Ti steel at high tem-peratures (12501400°C).Notably,the small grains (grainsCited by 7Publish Year 2015Author Su-Fen Tao,Fu-Ming Wang,Gui-Lin Sun,Zhan-Bing Yang,Chang-Rong LiCarbide dissolution and austenite grain growth behavior of Jun 04,2020·The isothermal grain growth behavior for a new ultrahigh-strength stainless steel (UHSSS) is investigated in temperature range from 900 to 1150 °C and holding time range from 0 to 20 min.In the temperature range from 1000 to 1050 °C,a bimodal grain size distribution was induced by different austenite grain growth rates which resulted from the weakened pinning effect by the partial Cited by 7Publish Year 2016Author Sha-Sha Li,Yao-Hui Liu,Yu-Lai Song,Ling-Nan Kong,Tuan-Jie Li,Ren-Hang ZhangPreventing Abnormal Grain Growth of Austenite in LowAbnormal grain growth (AGG) in austenitic state is studied in low alloy steel in relation with precipitation state.It is observed that initial austenite grain size and precipitation state plays more important role in defining the normal or abnormal grain growth condition than the final one obtained after a
be e ective in restricting grain growth behavior at temperatures when precipitates are stable.An increase in heating rate was found to reduce overall grain growth (from 48 to 25 m between 10 and 1000° C/s),eventually reaching a limiting behavior at the maximum heating rate (i.e.1000° C/s).PRECIPITATE COARSENING AND GRAIN GROWTH INIn grain growth the particles abut one another and are not separated by a matrix phase.This paper deals with grain growth in austenite and ferrite and the coarsening of compound precipitates.The latter include both temper carbides and other compounds used in strengthening and in control of grain size in austenite and ferrite.People also askWhat is the growth of austenite?What is the growth of austenite?Grain growth in austenite and ferrite is limited by particle pinning and by solute segregation at grain boundaries.Progress has been made in the modeling of grain growth and some experimental verification has been made.Particulate phases are important in ferrite and austenite,both for strengthening and for grain size control.PRECIPITATE COARSENING AND GRAIN GROWTH IN STEELS
investigated the austenite grain growth behavior and they found that heating temperature,holding time are the main affecting factor on the austenite grain growth behavior [6-7].Pous-Romero developed a model to show the evolution of the austenite grain structure in nuclear pressure vessel steel .The Effect of Size and Distribution of MnS Inclusions on Aug 31,2017·Based on the results,the austenite grain growth behavior of the two steels are studied and the effect of MnS inclusions on the austenite grain growth are discussed using an optical microscope,a scanning electron microscopy,and a confocal scanning laser microscopy.The effect of micro alloying elements (vanadium,titanium The austenite grain growth behavior of microalloying elements free steel (nitrogen steel) and micro alloyed steel (VN steel and VTiN steel) was investigated.The equilibrium dissolving behavior of precipitates was calculated by thermodynamic software and the morphology was observed by tunneling electron microscope.
Jun 15,2011·1.Introduction.The grain growth of austenite in heating process of steel has been focused by many researchers for many years.Sha and Sun investigated the grain growth behavior of austenite in NbVTi microalloyed steel,and found that the grains of austenite grow up with the increasing of heating temperature; the Ti-rich carbonitrides assembling in the grain boundaries of austenite