摘要
利用倒扭摆仪研究了不同退火温度对Fe -7Al- 0 .5Ti合金阻尼性能的影响,并借助水基磁流体分析了磁畴结构变化,利用扫描电镜分析了晶界析出物的形态及组成。结果表明, 1000℃退火保温 2h时,Fe -7Al- 0 .5Ti合金阻尼性能出现峰值。热处理温度越高,组织内应力和缺陷的减少使得磁畴的排列越来越整齐,磁畴宽度也越大,但晶界附近少量含Ti碳化物析出,导致局部成分和结构的非均匀化,不仅使得该区域磁畴细化,而且阻碍了畴界的移动,从而影响了阻尼性能的提高。
The damping capacity of Fe-7Al-0.5Ti alloy annealed at different temperature was measured by reversal torsion apparatus. The water-based magnetic fluid was used to analyze the variation of magnetic domain structure. The precipitation along the grain boundary was investigated by SEM. The results show that there exists a damping peak when the alloy is annealed at 1000°C for 2 h and water-cooled. The internal stress and defects decrease with the increase of heat treatment temperature and this makes magnetic domains wider and more orderly, but the carbides containing Ti precipitate along the grain boundaries which cause local components and structure heterogeneousness in these areas. As a result, the magnetic domains are narrower, the domain boundary motion is obstructed, and the improvement of damping capacity of this alloy is also affected.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
2005年第3期43-45,共3页
Heat Treatment of Metals
基金
核燃料及材料国家级重点实验室项目
