Microstructure and Mechanical Properties of Low-Activation Fe-Cr-V Multicomponent Single-Phase Alloys

被引:13
作者
Sun, Zhiping [1 ]
Cui, Huachun [1 ]
机构
[1] Qilu Univ Technol, Shandong Acad Sci, Sch Mech & Automot Engn, Jinan 250353, Shandong, Peoples R China
关键词
Gibbs free energy; microstructure; multicomponent alloy; phase stability; INDUCED STRUCTURAL-CHANGE; SOLID-SOLUTION; ENTROPY;
D O I
10.1007/s11665-018-3436-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A ternary equiatomic and nearly equiatomic alloy composed of the low-activation elements Fe, Cr, and V was designed for potential application as low-activation structural materials for the first wall of fusion reactors. The optimal composition of the multicomponent alloy was determined by minimizing the Gibbs free energy for solid-solution formation. The microstructure, phase stability, and mechanical properties of the equiatomic and optimized Fe-Cr-V alloys were studied. The equiatomic alloy consisted of a body-centered-cubic (BCC) solid-solution phase with a small amount of a face-centered-cubic (FCC) solid-solution phase, whereas the optimized alloy consisted of a single BCC solid-solution phase in the as-cast state. The crystal grains of both alloys were equiaxial. No phase transition was observed in the optimized alloy after homogenization; however, for the equiatomic alloy, the FCC solid-solution phase disappeared and surface relief was observed. The Vickers microhardness and yield strength of the Fe-Cr-V alloys increased after homogenization compared with those of the as-cast alloys.
引用
收藏
页码:3394 / 3400
页数:7
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