摘要
利用扫描电镜电子通道衬度技术(SEM-ECC)和透射电子显微镜(TEM)对[013]取向Cu单晶体在空气中和NaCl水溶液中疲劳到饱和的位错结构进行观察。结果表明:在0.5mol/L Nacl水溶液中,腐蚀疲劳饱和位错结构主要是迷宫和脉络位错结构,这与空气中的驻留滑移带(PSBs)和脉络位错结构不同,腐蚀疲劳饱和位错结构的观察表明,介质对疲劳位错结构的影响相当于在其它条件都不变的情况下,增大了疲劳的塑性切应变幅。
The saturation dislocation microstructures-in a [013] orientated copper single crystal during fatigue in air and NaCl aqueous solution were observed by electron channeling contrast (ECC) technique in SEM and TEM. The results show that the saturation dislocation structure during the corrosion fatigue in the aqueous solution of 0.5 mol/L NaCl mainly consists of labyrinth and veins dislocation structures, which differs from the dislocation structures of the PSBs and veins in the air environment. The observation reveals that the influence of environment for fatigued dislocation structures is equivalent to increase the plastic shear strain amplitude to the fatigued sample when other conditions are identical.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第1期99-102,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金50271075
中国博士后基金
关键词
Cu单晶体
腐蚀疲劳
位错微结构
copper single crystal
corrosion fatigue
dislocation microstructure
