Effect of crystal fraction on hardness in FINEMET and NANOPERM nanocomposite alloys
Effect of crystal fraction on hardness in FINEMET and NANOPERM nanocomposite alloys
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DOI：
10.1063/1.1855173
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发表时间：
2005-05
影响因子：
3.2
通讯作者：
C. Um;F. Johnson;M. Simone;J. Barrow;M. McHenry
中科院分区：
文献类型：
--
作者：
C. Um;F. Johnson;M. Simone;J. Barrow;M. McHenry
研究了FINEMET （Fe71.1Si18.5B6.3Nb3Cu1.1）和NANOPERM合金（Fe91Zr7B2）的纳米晶化动力学，并测定了力学性能（硬度）随晶相体积分数（VFC）的变化。时间相关磁化和磁滞回线测量分别用于确定FINEMET和NANOPERM的VFC。动力学结果提供了必要的信息来解释硬度测量。采用纳米压痕法测定硬度，并将其作为VFC的函数，研究纳米复合材料结构的演变对力学性能的影响。提出了硬度随VFC增加而线性增加的强化机理。
Nanocrystallization kinetics of a FINEMET (Fe71.1Si18.5B6.3Nb3Cu1.1) and a NANOPERM alloy (Fe91Zr7B2) were studied and the variation of mechanical properties (hardness) with volume fraction of the crystalline (VFC) phase determined. Time-dependent magnetization and hysteresis loop measurements were used to determine VFC for FINEMET and NANOPERM, respectively. Kinetic results are presented to provide the information necessary to interpret the hardness measurements. Hardness was measured by nanoindentation as a function of VFC to investigate the effect of the evolution of the nanocomposite structure on the mechanical properties. Strengthening mechanisms to understand the linear increase of hardness with the increase of VFC are presented.