摘要
对Ｆｅ－３６．５ａｔ％Ａｌ金属间化合物进行了高温拉伸试验研究。结果表明，变形温度在６００～１０００℃范围内，这种ＦｅＡｌ合金的延伸率随温度的升高不断增加，在１０００℃时延伸率最高，达１１５％。经透射电镜分析，该合金高温变形后不仅有大量的滑移位错线，而且有一定数量的位错绻线存在。这些位错的柏氏矢量均为〈１１１〉。研究认为，该合金在高温时的良好塑性来自于〈１１１〉型位错参与滑移以及〈１１１〉型位错发生攀移。
The mechanical properties of Fe 36 5at% Al intermetallic alloy at elevated temperatures have been measured The elongation to failure of the alloy increases significantly with the temperature increasing from 600℃ to 1000℃ and the and the maximum of elongation to failure is up to 115% when the alloy deformed at 1000℃ The dislocation features in the alloy have also been investigated by transmission electron microscopy There exist not only a large number of gliding dislocation lines but also a number of helical dislocations in the Fe Al alloy deformed at elevated temperatures All of these dislocations have a Burger vector of <111> It is assumed that the climb motion as well as the glide motion of dislocations with a<111> Burgers vector are responsible for a good ductility of the Fe 36 5at% Al alloy deformed at elevated temperatures
出处
《材料工程》
EI
CAS
CSCD
北大核心
1998年第10期11-14,共4页
Journal of Materials Engineering
关键词
金属间化合物
力学性能
位错
高温
铁铝
FeAl intermetallic alloy mechanical property dislocation
