先进材料疑固实验室 Laboratory of Advanced Materials Solidification 1896 1920 1987 2006 Solidification of multi phase alloys(2) Dr.Mingxu Xia anced Mate 国 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
1896 1920 1987 2006 Solidification of multi phase alloys (2) Dr. Mingxu Xia
先进材料疑固实验室 References Laboratory of Advanced Materials Solidification M.C.Flemings,凝固过程 W.Kuz,凝固原理 介万奇，凝固技术 JA Dantzig,M.Rappaz,Solidification tory of vanced Materials Solid 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
References M.C.Flemings, 凝固过程 W.Kurz,凝固原理 介万奇，凝固技术 JA Dantzig, M. Rappaz, Solidification
先进材料疑固实验室 OUTLINE Laboratory of Advanced Materials Solidification Solidification of Eutectics Solidification of Peritectics General considerations of pertitectics Nucleation of peritectics Solidification of peritectics Microstructure control through solidification method Solidification Defects The other defects vanced MaterialsS 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
OUTLINE Solidification of Eutectics Solidification of Peritectics • General considerations of pertitectics • Nucleation of peritectics • Solidification of peritectics Microstructure control through solidification method Solidification Defects The other defects
先进材料疑固实验室 General considerations Laboratory of Advanced Materials Solidification Many important industrial alloys exhibit a peritectic transforamtion during solidfiication.The most important systems are steel(Fe-C), Bronze(Cu-Sn)and brass(Cu-Zn).Peritectic invariants are also found in Al-Ti,Al-Ni or high-Tc YBaCuO superconductors. 0+l→B Cper Cper Cper a liquid T品(C) a+l aY 6+ C C B liquid (a) (b) (c) 上游文通大学 SHANGHAI JIAO TONG UNIVERSITY
General considerations Many important industrial alloys exhibit a peritectic transforamtion during solidfiication. The most important systems are steel (Fe-C), Bronze (Cu-Sn) and brass (Cu-Zn). Peritectic invariants are also found in Al-Ti, Al-Ni or high-Tc YBaCuO superconductors. α+l→β
先进材料疑固实验室 Nucleation Laboratory of Advanced Materials Solidification a phase nucleation temperature:T=(Ti(C)-4T) B phase nucleation temperature:=(T(C)-4T, Where,T(Co)T(C)liquidus temperature,4T undercooling T T △T% me Effective liquidus line △T 上浒充通大学 SHANGHAI JIAO TONG UNIVERSITY
Nucleation α phase nucleation temperature: β phase nucleation temperature: Where, liquidus temperature, undercooling