Effect of Aluminum and Silicon on Transformation Induced Plasticity of the TRIP Steel  

作　　者：LinLI B.C.DeCoomant P.Wollants YanlinHE XiaodongZHOU 

机构地区：[1]Dept.Mater.Sci.&Eng.,ShanghaiUniversity,149YanchangRoad,Shanghai200072,China [2]LaboratoryforIronandSteelmaking,UniversiteitGent,Technologiepark9,B-9052Zwijnaarde,Belgium [3]Dept.MTM,KatholiekeUniversiteitLeuven,KasteelparkArenberg44,B-3001Leuven,Belgium [4]ShanghaiBaosteelResearchInstitute,FujinRoad,Shanghai201900,China

出　　处：《Journal of Materials Science & Technology》2004年第2期135-138,共4页材料科学技术（英文版）

基　　金：This work was financially supported by the National Natural Science Foundation of China(No.50171038);the China-Belgium bilateral project(2001-242).

摘　　要：With the sublattice model, equilibrium compositions of ferrite (a) and austenite (7 ) phases, as well as the volume percent of austenite (7) at 780℃ in different TRIP steels were calculated. Concentration profiles of carbon, Mn, Al and Si in the steels were also estimated under the lattice fixed frame of reference so as to understand the complex mechanical behavior of TRIP steels after different isothermal bainitic transformation treatments. The effect of Si and Mn on transformation induced plasticity (TRIP) was discussed according to thermodynamic and kinetic analyses. It is recognized that Al also induces phase transformation in the steels but its TRIP effect is not as strong as that of Si.With the sublattice model, equilibrium compositions of ferrite (a) and austenite (7 ) phases, as well as the volume percent of austenite (7) at 780℃ in different TRIP steels were calculated. Concentration profiles of carbon, Mn, Al and Si in the steels were also estimated under the lattice fixed frame of reference so as to understand the complex mechanical behavior of TRIP steels after different isothermal bainitic transformation treatments. The effect of Si and Mn on transformation induced plasticity (TRIP) was discussed according to thermodynamic and kinetic analyses. It is recognized that Al also induces phase transformation in the steels but its TRIP effect is not as strong as that of Si.

关 键 词：Equilibrium composition Concentration profile THERMODYNAMIC KINETIC 

分 类 号：TG142.25[一般工业技术—材料科学与工程]