Study of phase equilibria, diagrams and transformations in the Fe-Co-Si ternary system

被引：2

作者：

Yang, Mujin ^{[1
,2
]}

Wang, Cuiping ^{[1
,2
]}

Yang, Shuiyuan ^{[1
,2
]}

Wu, Chao ^{[1
,2
]}

Chen, Dichun ^{[3
]}

Shi, Zhan ^{[1
,2
]}

Liu, Xingjun ^{[1
,2
]}

机构：

[1] Xiamen Univ, Coll Mat, Xiamen 361005, Peoples R China

[2] Xiamen Univ, Fujian Prov Key Lab Mat Genome, Xiamen 361005, Peoples R China

[3] Luoyang Ship Mat Res Inst, Xiamen Branch, Xiamen 361005, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2017年 / 201卷

基金：

中国国家自然科学基金;

关键词：

Phase equilibrium; Magnetic transition; Order-disorder transition; Martensitic transformation; Microstructure; MARTENSITIC-TRANSFORMATION; HEAT-TREATMENTS; COBALT;

D O I：

10.1016/j.matchemphys.2017.08.007

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A 1000 degrees C isothermal phase diagram in the total composition range of the Fe-Co-Si ternary system is constructed featuring the interconnected epsilon-(Fe,Co)Si, large bcc-structure (alpha Fe), and fcc-structure (gamma Fe,alpha Co) phases. In addition, a vertical magnetic plus ordering transition phase diagram of Fe80-xCoxSi20 allosy is also constructed. It is shown that the magnetic transition (D0(3)(ferro./para.)) temperature increases with the Co concentration and reaches a maximum value (845 degrees C) at 50 at. % Co in the investigated Fe80-xCoxSi20 alloys. Meanwhile, the B2/D0(3) ordering transition temperature versus Co content dependence exhibits an initial slight rise followed by a gradual decrease to similar to 67 at. % Co. Furthermore, a fcc/bcc martensitic transformation was revealed in several Co-rich ternary alloys under study. The resulting lath martensitic microstructures of the studied alloys include numerous twins and dislocations defects, revealing a similarity with the FeNi-based alloy system. (C) 2017 Published by Elsevier B.V.

引用

页码：180 / 188

页数：9

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