摘要
研究了不同成分的Fe-Cu合金在过饱和固溶体状态下其硬度随Cu含量的变化规律,分析了Cu元素在Fe中的固溶强化作用。研究了Fe-Cu合金的时效硬化现象以及Cu的析出过程,结果表明Fe-Cu合金硬度值增加近一倍,通过透射电镜观察到随时效时间的增加,析出相的尺寸逐渐增大,形状由球状转变为棒状。电子衍射分析得知,时效处理硬度达到最大值时对应的析出相具有B2型晶体结构,与基体之间保持平行位向关系。
The variation of hardness in binary Fe-Cu alloys with different Cu content under the condition of supersaturation and was investigated. The aging hardening phenomenon and precipitation behavior of the Fe-Cu hinary alloys were examined. Experimental results show that hardness of the Fe-Cu alloys is almost doubled by aging treatment. TEM observation reveals that size of the precipitates increases with prolonging aging time and morphology of the precipitates changes from spherical shape to bar-like shape with increasing aging time. The electron diffraction analyses shows that the precipitates of Cu is of B2 crystal structure under peak aging condition. The B2 precipitates keep parallel orientation relationship with Fe matrix.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2009年第3期80-83,共4页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金资助课题(50671012)
关键词
析出
时效硬化
B2晶体结构
相变
precipitation
age-hardening
B2 crystal structure
phase transformation
