Microstructure and nanohardness of Ti-48%Al alloy prepared by rapid solidification under different cooling rates

被引：13
|
作者：
Wang Hong-wei [1 ,2 ]
Zhu Dong-dong [1 ]
Zou Chun-ming [1 ]
Wei Zun-jie [1 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China
[2] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2011年 / 21卷
关键词：
rapid solidification; microstructure; cooling rate; TiAl intermetallics; MELT; RIBBONS;
D O I：
10.1016/S1003-6326(11)61600-2
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The influence of cooling rate on the microstructure and nanohardness of the rapidly solidified Ti-48%Al alloys prepared by melt spinning method was studied. The results show that the microstructure of the rapidly solidified ribbons is refined and homogenized compared with that of the conventionally cast mother alloy. With increasing the cooling rate, the grain size decreases greatly. The relationship between the ribbon thickness and the wheel speed was examined, and the effect of the wheel speed on the cooling rate was also studied. It was found that the ribbon thickness decreases inversely with the wheel speed. The nanohardness increases with increasing cooling rate due to the grain size strength.
引用
收藏
页码：S328 / S332
页数：5
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