Study of thermal ageing behaviour of Fe-Cr model alloys by magnetic hysteresis loop technique
Study of thermal ageing behaviour of Fe-Cr model alloys by magnetic hysteresis loop technique
复制标题
磁滞回线技术研究Fe-Cr模型合金的热老化行为
DOI：
10.1088/1742-6596/266/1/012041
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Y. Cheong
中科院分区：
文献类型：
--
作者：
J. Mohapatra;Y. Kamada;H. Kikuchi;S. Kobayashi;J. Echigoya;D. Park;Y. Cheong
采用电弧熔炼技术制备了不同 Cr 含量（5-20 wt.%）的 Fe-Cr 合金。合金在1050℃/2小时下固溶退火并空气淬火，然后在750℃/1小时下回火，随后空气冷却。热老化在 475 oC 下进行长达 1000 小时 (hrs) 的不同时间长度，以产生热脆化。 Fe−20%Cr合金的硬度和矫顽力增加，剩磁下降，这是由于富Cr a'相的析出及其随后的生长所致。在Fe−15% Cr和Fe−10% Cr合金中，由于位错恢复和富Cr相析出的竞争作用，矫顽力在时效初期下降，随后又增加。 Fe−5% Cr 合金的磁性能变化与其他合金不同，因为它处于 Cr 在 Fe 中的溶解度极限之内。 Fe−20% Cr 合金的矫顽力和硬度之间存在线性关系，表明磁滞回线（MHL）技术将成为 Fe-Cr 合金脆性无损评估（NDE）的良好工具。
Fe-Cr alloys with different Cr content (5–20 wt. %) were prepared by arc melting technique. The alloys were solution annealed at 1050 oC/ 2h and air quenched and then tempered at 750 oC/ 1h followed by air cooling. Thermal ageing was carried at 475 oC for various lengths of time up to 1000 hours (hrs) to produce thermal embrittlement. The hardness and coercivity of Fe−20% Cr alloys were increased and the remanence was decreased, being due to the precipitation of Cr-rich a' phase and their subsequent growth. In Fe−15% Cr and Fe−10% Cr alloys, it was found that the coercivity decreased at the initial ageing period and then increased subsequently due to the competing effect of recovery of dislocations and precipitation of Cr rich phase. The change in magnetic properties in Fe−5% Cr alloy was different than other alloys since it was within the solubility limit of Cr in Fe. A linear relationship was found between the coercivity and hardness in Fe−20% Cr alloy, indicating that Magnetic Hysteresis Loop (MHL) technique would be a good tool for the Non-Destructive Evaluatiion (NDE) of embrittlement in Fe-Cr alloys.
DOI：
--
发表时间：
2008
期刊：
Journal of Optoelectronics and advanced Materials 10,5
影响因子：
--
作者：
Y. Kai;Y. Tsuchida;M. Enokizono
通讯作者：
M. Enokizono