期刊
出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.msea.2014.06.099
关键词
Mechanical alloying; Nanocrystalline Fe-Cr alloys; Grain growth; Thermal stability
类别
资金
- U.S. Department of Energy [DE-NE0000538]
- State of North Carolina
- National Science Foundation
The influence of 1-4 at%, Hf additions on the thermal stability of mechanically alloyed nanocrystalline Fe-14Cr alloys was studied in this work. XRD-calculated grain size and microhardness results were reported versus isochronal annealing treatments up to 1100 degrees C Microstructural evolution was investigated using channeling contrast FIB imaging and TEM. Grain size of samples with 4 aft Hf was found to be maintained in the nanoscale range at temperatures up to 1000 degrees C Zener pinning was considered as a major source of high temperature grain size stabilization. By comparing the Orowan strengthening contribution to the total hardness, the deviation of grain size predictions from the actual grain size in Fe-14Cr-4Hf suggests the presence of thermodynamic stabilization by the solute segregation to grain boundaries (GBs). A predictive thermodynamic model indicates that the thermodynamic stabilization can be expected. (C) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据