Directional recrystallization and microstructures of an Fe-6.5wt%Si alloy

被引：23

作者：

Zhang, Zhongwu ^{[1
]}

Chen, Guang ^{[1
,2
]}

Bei, Hongbin ^{[2
]}

Li, Feng ^{[1
]}

Ye, Feng ^{[3
]}

Chen, Guoliang ^{[1
,3
]}

Liu, Chain-Tsuan ^{[2
,4
]}

机构：

[1] Nanjing Univ Sci & Technol, Minist Educ, Engn Res Ctr Mat Behav & Design, Nanjing 210094, Peoples R China

[2] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA

[3] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[4] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Hong Kong, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH | 2009年 / 24卷 / 08期

基金：

美国能源部;

关键词：

COLUMNAR GRAIN-GROWTH; COMMERCIAL PURE IRON; NICKEL; SUPERALLOYS; EVOLUTION; VELOCITY; TEXTURE; RIBBONS; MA-6000; BASE;

D O I：

10.1557/JMR.2009.0303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Directional recrystallization of an Fe-6.5wt%Si alloy was investigated by changing hot zone temperatures and growth rates. Elongated (columnar) grains with an aspect ratio more than 10 can be produced when growth parameters are carefully adjusted. It was found that at a fixed growth rate, the grain length and aspect ratio increase with increased hot zone temperatures. At a fixed hot zone temperature, there is a critical growth rate at which columnar grains have the largest average aspect ratio. Below or above this growth rate, the aspect ratio decreases. Texture and grain orientation analysis showed that the preferentially selective growth to form columnar grains was favored by the formation of low-energy surfaces and grain boundaries.

引用

页码：2654 / 2660

页数：7

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