FeAl金属间化合物的高温变形行为  

Deformation Behavior of an FeAl Intermetallic Alloy at Elevated Temperatures

作　　者：郦定强[1] 孙宝德[1] 刘毅 林栋梁 

机构地区：[1]上海交通大学国家教委高温材料及高温测试开放实验室

出　　处：《材料工程》1998年第10期11-14,共4页Journal of Materials Engineering

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

关 键 词：金属间化合物 力学性能 位错 高温 铁铝 

分 类 号：TG113.25[金属学及工艺—物理冶金] TG13[金属学及工艺—金属学]