摘要
采用自制实验装置对1A60铝导线在温度为90~130℃、应力为70~85 MPa条件下进行压入蠕变机制研究,并通过SEM和XRD分析蠕变前后的组织演变。结果表明:铝导线在稳态蠕变阶段的应力指数n为4.03,蠕变激活能QC为75.38 kJ/mol;蠕变后,导线受力区域的晶粒被压缩,基体被α-Al12Fe3Si相割裂,导致铝导线抗蠕变性能降低;铝导线的压入蠕变机制为晶界扩散主导的位错攀移运动。
The impression creep mechanism of 1A60 aluminum conductor was investigated by a special apparatus at 90-130 ℃ and70-85 MPa conditions.The changes of microstructure of the conductor before and after creep were analyzed by SEM and XRD.The results show that the stress exponent n of 1A60 aluminum conductor is 4.03 and creep activation energy QCis 75.38 kJ /mol in the steady creep stage;after creep,the grain in the experimental area of the conductor is compressed and the matrix is divided by α-Al12Fe3 Si phase,the result leads to the conductor creep resistance is decreased.The impression creep mechanism of the 1A60 aluminum conductor is dislocation climbing by grain boundary diffusion.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第11期97-100,共4页
Transactions of Materials and Heat Treatment
基金
西华大学研究生创新基金(Ycjj201307)
教育部"春晖计划"项目(Z2012012)
关键词
铝导线
压入蠕变
激活能
应力指数
1A60 aluminum conductor
impression creep
activation energy
stress exponent
