QUASI-CRYSTALLINE EUTECTIC GROWTH AND METASTABLE PHASE ORIENTATION RELATIONS IN RAPIDLY SOLIDIFIED FE-TI ALLOYS

被引：32

作者：

DONG, C ^{[1
]}

CHATTOPADHYAY, K ^{[1
]}

KUO, KH ^{[1
]}

机构：

[1] DAHLIAN INST TECHNOL,DEPT MAT ENGN,DALIAN,PEOPLES R CHINA

来源：

SCRIPTA METALLURGICA | 1987年 / 21卷 / 10期

关键词：

CRYSTALS - Orientation - IRON AND STEEL METALLOGRAPHY - Microstructures - MICROSCOPIC EXAMINATION - Transmission Electron Microscopy;

D O I：

10.1016/0036-9748(87)90104-9

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Fe-Ti alloys corresponding to the composition FeTi//2 can form icosahedral quasicrystals from the melt during rapid solidification. The morphology consists of imperfect nodules with a tendency for primary dendritic growth and encirclement by metastable beta titanium. These metastable phases compete with the FeTi//2 phase which is also not observed under equilibrium conditions. The authors carried out experiments to delineate the hierarchy of the metastable phase formation. In the process they discovered a quasicrystalline eutectic reaction followed by the formation of a metastable large cell cubic phase. Orientation relationships between the icosahedral phase and the crystalline phase are given.

引用

页码：1307 / 1312

页数：6

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