SANS Study of Phase Decomposition in Fe-Cu Alloy with Ni and Mn Addition
SANS Study of Phase Decomposition in Fe-Cu Alloy with Ni and Mn Addition
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DOI：
10.2355/isijinternational.34.346
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发表时间：
1994-04
影响因子：
1.8
通讯作者：
K. Osamura;H. Okuda;K. Asano;M. Furusaka;K. Kishida;F. Kurosawa;R. Uemori
中科院分区：
文献类型：
--
作者：
K. Osamura;H. Okuda;K. Asano;M. Furusaka;K. Kishida;F. Kurosawa;R. Uemori
采用小角中子散射（SANS）测量方法研究了Fe-Cu-Ni-Mn季元合金相分解初期的结构变化。散射强度数据分析表明，在2 nm以上，核基尼尔半径大于磁基尼尔半径。这可能是由于fcc富铜沉淀周围形成了富集Ni、Mn的偏析层。原子探针（AP）分析直接证实了这种偏析，并从热力学角度证实了这种偏析。计算的SANS强度与中子散射的磁分量和核分量的实验数据拟合得很好。在Fe-Cu二元合金中加入Ni和Mn可以促进e-Cu相的析出反应。
Small-angle neutron scattering (SANS) measurements were carried out to investigate the structural change during the early stage of phase decomposition in Fe-Cu-Ni-Mn quaternary alloy. Data analysis of scattering intensities showed that the nuclear Guinier radius becomes larger than the magnetic one beyond about 2 nm. This is suggested to be attributable to the formation of segregated layer enriched by Ni and Mn around fcc copper-rich precipitate. This segregation was confirmed directly by atom-probe (AP) analysis and approved from a thermodynamic point of view. The calculated SANS intensities are well fitted to experimental data of both magnetic and nuclear components of neutron scatterings. Addition of Ni and Mn in Fe-Cu binary alloy was suggested to promote the precipitation reaction of e-Cu phase.