Abstract

The precipitates obtained by EPE technology from the 9Cr-1.7W-0.4Mo-Co ferritic heat-resistant steel subject to isothermal aging were investigated using SEM, TEM and XRD. The particle size distribution and the coarsening kinetics of M23C6 with duration of isothermal aging were also analyzed with or without consideration of Laves phase. The results show that the isolated dislocations were detected in delta ferrite interior, and the precipitates on delta ferrite and martensite boundaries are obviously larger than other locations. Fe2W-Laves phase can only be found as duration of aging time to 2000 h, and is preferential to form adjacent to M23C6 particles. The small M23C6 particles firstly coarsen, but the large M23C6 are relatively stable during short aging. The total coarsening rate of M23C6 precipitates is 9.75 × 10−28m3s−1, and the coarsening of M23C6 depends on the formation of Laves phase.

Details

Title
Precipitates and Particles Coarsening of 9Cr–1.7W–0.4Mo–Co Ferritic Heat-Resistant Steel after Isothermal Aging
Author
Gao, Qiuzhi 1 ; Zhang, Yanan 2 ; Zhang, Hailian 3 ; Li, Huijun 4 ; Qu, Fu 1 ; Han, Jian 4 ; Cheng, Lu 4 ; Wu, Bintao 4 ; Lu, Yao 4 ; Ma, Yan 4   VIAFID ORCID Logo 

1  School of Materials Science and Engineering, Northeastern University, Shenyang, China 
2  Research and Development Department, CITIC Bohai Aluminium Industries Holding Company, LTD., Qinhuangdao, China 
3  School of Economics and Management, Yanshan University, Qinhuangdao, China 
4  School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, Australia 
Pages
1-11
Publication year
2017
Publication date
Jul 2017
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41598-017-06191-2
ProQuest document ID
1956173073
Copyright
© 2017. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.