典型文献
Carbide Precipitation in Austenite of a Titanium-Tungsten-Bearing Low-Carbon Steel
文献摘要：
In this study,the carbide precipitation at 925℃in austenite(γ)of a 0.04C-1.5Mn-0.10Ti-0.39 W(wt％)low-carbon steel was investigated by stress relaxation(SR)high-resolution transmission electron microscopy and atom probe tomography.First-principles calculations were employed to reveal the precipitation mechanism.Results indicate that a high dispersion of W-and Fe-rich MC-type ultrafine carbides(＜10 nm)forms during the very early stage prior to the onset of precipitation determined by SR.These ultrafine carbides possess a B1-crystal structure with a lattice parameter of 3.696 ?,which is quite close to that of γ(3.56 ?).It can significantly decrease the misfit of carbide/γ interface with a cube-on-cube relationship,thus assisting the carbide nucleation.As the time prolongs,a few spherical or polygonal Ti-rich(Ti,W)C particles(18-60 nm)are formed at the expense of the ultrafine carbides by nucleation and growth on them.These(Ti,W)C particles are identified with a"core-shell"structure(Ti-rich core and Ti,W-rich shell),which leads to a better-coarsening resistance compared with pure TiC in Ti steel.Calculation results show that the composition and structure of carbides at certain stage are closely related to a combined effect of W,Fe,and Ti atoms together with interstitial vacancies.
文献关键词：
中图分类号：
作者姓名：
Yanyuan Zhou;Zhenqiang Wang;Haokai Dong;Fengchun Jiang
作者机构：
Key Laboratory of Superlight Materials and Surface Technology,Ministry of Education College of Material Science and Chemical Engineering,Harbin Engineering University,Harbin 150001,China;National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Technology,Guangzhou 510641,China
文献出处：
引用格式：
[1]Yanyuan Zhou;Zhenqiang Wang;Haokai Dong;Fengchun Jiang-.Carbide Precipitation in Austenite of a Titanium-Tungsten-Bearing Low-Carbon Steel)[J].金属学报（英文版）,2022(07):1090-1102
A类：
10Ti
B类：
Carbide,Precipitation,Austenite,Titanium,Tungsten,Bearing,Low,Carbon,Steel,In,this,study,precipitation,austenite,04C,5Mn,low,carbon,steel,was,investigated,by,stress,relaxation,SR,high,resolution,transmission,electron,microscopy,probe,tomography,First,principles,calculations,were,employed,reveal,mechanism,Results,indicate,that,dispersion,rich,MC,type,ultrafine,carbides,forms,during,very,early,stage,prior,onset,determined,These,possess,B1,crystal,structure,lattice,parameter,which,quite,It,significantly,decrease,misfit,interface,cube,relationship,thus,assisting,nucleation,prolongs,few,spherical,polygonal,particles,formed,expense,growth,them,identified,core,shell,leads,better,coarsening,resistance,compared,pure,TiC,Calculation,results,show,composition,certain,closely,related,combined,effect,atoms,together,interstitial,vacancies
AB值：
0.615375
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