期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 706, 期 -, 页码 584-588出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.02.271
关键词
Atom probe tomography; Ferritic steels; Heusler phases; Precipitation; Transmission electron microscopy (TEM)
资金
- Department of Energy (DOE), Office of Fossil Energy Program [DE-09NT0008089, DE-FE0005868, DE-FE-0011194, DE-FE-0024054]
- ORNL's Center for Nanophase Materials Sciences (CNMS)
- DOE Office of Science User Facility
The microstructures of a hierarchical-precipitate-strengthened ferritic alloy are characterized, using transmission-electron microscopy (TEM) and atom-probe tomography (APT). The alloy shows duplex precipitates. The primary precipitate with an average edge length of 90 nm consists of NiAl -and Ni2TiAl-type phases, while the secondary precipitate with an average radius of 2 nm is a NiAl-type phase. Based on the APT results, the volume fractions of the primary and secondary precipitates were calculated, using the lever rule to be 17.3 and 2.3%, respectively. (C) 2017 Elsevier B.V. All rights reserved.
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