Phase stability of four different chemical component Fe-Cr-Mn(W, V) alloys are investigated by experimental method and thermodynamic model in this paper. It is indicated that the main phase of four alloys after aged u...Phase stability of four different chemical component Fe-Cr-Mn(W, V) alloys are investigated by experimental method and thermodynamic model in this paper. It is indicated that the main phase of four alloys after aged under 623, 673, 773K for 200h are austenitic phase. The results of Thermo-Calc, which are based on Gibbs energy, show that the phases of four alloys under ihe same temperature as experimental method are single austenitic phase. The results of experimental method and Thermo-Calc agree well.展开更多
The behavior of void swelling and segregation in Fe-15Cr-xMn alloys and an alloy con- taining small amount of W and V was investigated by electron-irradiation.The compositional analysis in the irradiated regions inclu...The behavior of void swelling and segregation in Fe-15Cr-xMn alloys and an alloy con- taining small amount of W and V was investigated by electron-irradiation.The compositional analysis in the irradiated regions including grain boundaries was performed.The resultdts show that there are many common features of irradiuation tehavior in the Fe-Cr-Mn and Fe-Cr-Ni systems while there are some significant differences,In the Fe-Cr-Mn alloy sys- tems void swelling was rematrkably suppressed and at the same time the radiation-induced segregation was also retarded,furthermore,the segregation was strongly retarded in an Fe-15Cr-15Mn alloy containing small amount of W and V.The results also show that Ni re- placed by Mn does not in general confer immunity from either swelling or phase instabilities. The phase instability is due to the different diffusion behavior of Ni and Mn in reponse to the operation of the inverse-Kirkendall effecr.Fe segregates to the microstructural sinks in the Fe-Cr-Mn alloys.The segregation of Fe often leads to the formation of ferrite.This fact is beneficial to reducing the swelling rate and segregation on the grain boundaries.展开更多
文摘Phase stability of four different chemical component Fe-Cr-Mn(W, V) alloys are investigated by experimental method and thermodynamic model in this paper. It is indicated that the main phase of four alloys after aged under 623, 673, 773K for 200h are austenitic phase. The results of Thermo-Calc, which are based on Gibbs energy, show that the phases of four alloys under ihe same temperature as experimental method are single austenitic phase. The results of experimental method and Thermo-Calc agree well.
文摘The behavior of void swelling and segregation in Fe-15Cr-xMn alloys and an alloy con- taining small amount of W and V was investigated by electron-irradiation.The compositional analysis in the irradiated regions including grain boundaries was performed.The resultdts show that there are many common features of irradiuation tehavior in the Fe-Cr-Mn and Fe-Cr-Ni systems while there are some significant differences,In the Fe-Cr-Mn alloy sys- tems void swelling was rematrkably suppressed and at the same time the radiation-induced segregation was also retarded,furthermore,the segregation was strongly retarded in an Fe-15Cr-15Mn alloy containing small amount of W and V.The results also show that Ni re- placed by Mn does not in general confer immunity from either swelling or phase instabilities. The phase instability is due to the different diffusion behavior of Ni and Mn in reponse to the operation of the inverse-Kirkendall effecr.Fe segregates to the microstructural sinks in the Fe-Cr-Mn alloys.The segregation of Fe often leads to the formation of ferrite.This fact is beneficial to reducing the swelling rate and segregation on the grain boundaries.
