Formation of Nanometer Coherent Structures During Spinodal
Decomposition and Ordering Coexistence Phase
Transformation in Fe-24Al Alloys

doi:10.1007/s12204-012-1306-9

上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (4): 461-464.doi: 10.1007/s12204-012-1306-9

Formation of Nanometer Coherent Structures During Spinodal Decomposition and Ordering Coexistence Phase Transformation in Fe-24Al Alloys

ZHAO Rong-da1,2 (赵荣达), ZHU Jing-chuan2 (朱景川), LAI Zhong-hong2 (来忠红), LIU Yong2 (刘勇)

(1. Department of Materials Science and Engineering, Liaoning Institute of Technology, Jinzhou 121001, Liaoning, China; 2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

出版日期:2012-08-30 发布日期:2012-11-16
通讯作者: ZHU Jing-chuan2 (朱景川) E-mail:zhujcl@gmail.com

Formation of Nanometer Coherent Structures During Spinodal Decomposition and Ordering Coexistence Phase Transformation in Fe-24Al Alloys

ZHAO Rong-da1,2 (赵荣达), ZHU Jing-chuan2 (朱景川), LAI Zhong-hong2 (来忠红), LIU Yong2 (刘勇)

(1. Department of Materials Science and Engineering, Liaoning Institute of Technology, Jinzhou 121001, Liaoning, China; 2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)

Online:2012-08-30 Published:2012-11-16
Contact: ZHU Jing-chuan2 (朱景川) E-mail:zhujcl@gmail.com

摘要/Abstract

摘要： The nanometer coherent structure evolution of spinodal decomposition and ordering coexistence phase transformation in Fe-24Al alloys is investigated by the microscopic phase field kinetic model. The results show that the concentration and long-range order parameters all continuously change towards to their equilibrium values during phase transformation. With the increase of elastic interaction energy, the anisotropy along [01] or [10] elastic soft direction is more obvious and the time reaching equilibrium state is also shortened. According to the results, the formation of nanometer coherent structures during phase transformation is composed of the initial decreasing stage of order degree stage, the incubation stage, the continuous increasing stage of concentration order parameter and long-range order parameter, and the later stable stage. The spinodal decomposition and ordering is interaction; the initial ordering stage is a necessary condition of the coexistence phase transformation. The nanometer coherent structures are not found to grow during the whole phase transformation. The simulation results are in accordance with the results in experiment obtained by the aging treatment in Fe-24Al alloys.

关键词: spinodal decomposition, ordering, coherent structures, phase field

Abstract: The nanometer coherent structure evolution of spinodal decomposition and ordering coexistence phase transformation in Fe-24Al alloys is investigated by the microscopic phase field kinetic model. The results show that the concentration and long-range order parameters all continuously change towards to their equilibrium values during phase transformation. With the increase of elastic interaction energy, the anisotropy along [01] or [10] elastic soft direction is more obvious and the time reaching equilibrium state is also shortened. According to the results, the formation of nanometer coherent structures during phase transformation is composed of the initial decreasing stage of order degree stage, the incubation stage, the continuous increasing stage of concentration order parameter and long-range order parameter, and the later stable stage. The spinodal decomposition and ordering is interaction; the initial ordering stage is a necessary condition of the coexistence phase transformation. The nanometer coherent structures are not found to grow during the whole phase transformation. The simulation results are in accordance with the results in experiment obtained by the aging treatment in Fe-24Al alloys.

Key words: spinodal decomposition, ordering, coherent structures, phase field

中图分类号:

TG 131

ZHAO Rong-da1,2 (赵荣达), ZHU Jing-chuan2 (朱景川), LAI Zhong-hong2 (来忠红), LIU Yong2 (. Formation of Nanometer Coherent Structures During Spinodal Decomposition and Ordering Coexistence Phase Transformation in Fe-24Al Alloys[J]. 上海交通大学学报（英文版）, 2012, 17(4): 461-464.

ZHAO Rong-da1,2 (赵荣达), ZHU Jing-chuan2 (朱景川), LAI Zhong-hong2 (来忠红), LIU Yong2 (刘勇). Formation of Nanometer Coherent Structures During Spinodal Decomposition and Ordering Coexistence Phase Transformation in Fe-24Al Alloys[J]. Journal of shanghai Jiaotong University (Science), 2012, 17(4): 461-464.

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Formation of Nanometer Coherent Structures During Spinodal Decomposition and Ordering Coexistence Phase Transformation in Fe-24Al Alloys

Formation of Nanometer Coherent Structures During Spinodal Decomposition and Ordering Coexistence Phase Transformation in Fe-24Al Alloys

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