Effect of rotation mode on microstructure and mechanical properties of directionally solidified Nb-Silicon based alloys

被引：0
|
作者：
Wu, Meiling [1 ]
Li, Shusuo [1 ]
Han, Yafang [2 ]
机构：
[1] Beihang Univ, Sch Mat Sci & Engn, 37 Xueyuan Rd, Beijing 100191, Peoples R China
[2] Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China
来源：
2011 CHINESE MATERIALS CONFERENCE | 2012年 / 27卷
关键词：
Nb-Si; Intermetallics; Rotate mode; Directionally solidification; Fracture toughness;
D O I：
10.1016/j.proeng.2011.12.569
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nb-xSi(x= 3,9)-22Ti-3Cr-3Al-2Hf (at.%) have been successfully prepared by directional solidification(DS) in an optical floating zone furnace with different rotation mode. Microstructure analysis and phases identification of the alloys were examined by X-ray diffraction (XRD), Electro Probe Micro Analyzer (EPMA) and Energy Disperse Spectroscopy (EDS). Fracture toughness specimens without pre-crack were prepared and room temperature fracture toughness of alloys was tested by three-point bending method. The results showed the microstructure and fracture toughness of directionally solidified Nb-silicon based alloys were seriously affected by the rotation mode in the processing of directional solidification. The influence of rotate mode on microstructure and fracture toughness had been discussed in this paper. (C) 2011 Published by Elsevier Ltd.
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页码：1179 / 1186
页数：8
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