Anomalously linear grain growth in nanocrystalline Fe

作者：Paul Heiko; Krill Carl E III^*

来源：Scripta Materialia, 2011, 65(1): 5-8.

DOI：10.1016/j.scriptamat.2011.03.028

• Grain growth
• Iron
• X-ray diffraction
• Nanocrystalline materials

Isothermal grain growth curves recorded in nanocrystalline Fe at 423 and 452 degrees C manifest a linear time dependence followed by an equally anomalous acceleration in growth rate, accompanied by a broadening and then a narrowing of the grain-size distribution. This behavior appears not to result from a transition in the rate-controlling mechanism for grain growth from triple-junction to grain-boundary migration, as posited previously. Rather, the observations are found to be consistent with the predictions of a phenomenological model for abnormal grain growth.

• 出版日期2011-6