Han Young-Soo, Park Duck-Gun, Kobayashi Satoru
J Nanosci Nanotechnol. 2015 Nov;15(11):8608-12. doi: 10.1166/jnn.2015.11478.
Nano-sized precipitates in a Fe-1 wt% Cu alloy were studied by SANS (Small Angle Neutron Scattering). The SANS experiments were performed with the 40 m SANS instrument at HANARO. Due to the ferromagnetic nature of the ferrous alloys, a horizontal magnetic field of 1 Tesla was applied during the SANS experiment. The nano-sized Cu precipitates were quantitatively analyzed by SANS in the Fe-1 wt% Cu alloy. The size of the precipitates increased from 2 nm to 4 nm with increasing aging time from 20 min. to 1800 min. at 753 K. The measured A-ratio obtained from SANS data increased from 2.2 to 6.6 with increasing aging time. It is surmised that Cu clusters containing a large amount of Fe are initiated at the early stage of aging and the Fe content in the Cu precipitate decreases with increasing aging time and eventually an almost pure BCC Cu precipitate is formed.
通过小角中子散射（SANS）研究了Fe-1 wt% Cu合金中的纳米级析出物。小角中子散射实验是在韩国原子能研究所的40米小角中子散射仪上进行的。由于铁合金的铁磁性质，在小角中子散射实验期间施加了1特斯拉的水平磁场。通过小角中子散射对Fe-1 wt% Cu合金中的纳米级铜析出物进行了定量分析。在753 K下，随着时效时间从20分钟增加到1800分钟，析出物的尺寸从2纳米增加到4纳米。从小角中子散射数据获得的测量A比率随着时效时间的增加从2.2增加到6.6。据推测，在时效早期会形成含有大量铁的铜簇，并且铜析出物中的铁含量随着时效时间的增加而降低，最终形成几乎纯的体心立方铜析出物。
