Microstructure and tensile properties of yttrium nitride dispersion-strengthened 14Cr-3W ferritic steels

Huang, Liqing, Liu, Zuming, Chen, Shiqi and Guo, Yang (2015) Microstructure and tensile properties of yttrium nitride dispersion-strengthened 14Cr-3W ferritic steels. Fusion Engineering and Design, 101 17-21. doi:10.1016/j.fusengdes.2015.09.004


Author Huang, Liqing
Liu, Zuming
Chen, Shiqi
Guo, Yang
Title Microstructure and tensile properties of yttrium nitride dispersion-strengthened 14Cr-3W ferritic steels
Journal name Fusion Engineering and Design   Check publisher's open access policy
ISSN 0920-3796
1873-7196
Publication date 2015-12-01
Sub-type Article (original research)
DOI 10.1016/j.fusengdes.2015.09.004
Open Access Status Not Open Access
Volume 101
Start page 17
End page 21
Total pages 5
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Language eng
Abstract 14Cr–3W ferritic steel powders were mechanically milled with microscale yttrium nitride (YN) particles to fabricate particle dispersion-strengthened ferritic steels. After hot consolidation and annealing, the steel matrix was homogeneously dispersed with nano-scale YN particles. The steel containing 0.3 wt.% YN particles exhibited a yield strength of 1445 MPa at room temperature. Its total elongation was 10.3%, and the fracture surface exhibited mixed ductile and quasi-cleavage fracture morphologies. The steel with a much higher content of YN particles (3 wt.%) in its matrix was much stronger (1652 MPa) at room temperature at the cost of ductility. In particular, it exhibited a high yield strength (1350 MPa) with applicable ductility (total elongation > 10%) at 500 °C. This study has developed a new kind of reinforcement particle to fabricate high-performance ferritic steels.
Keyword Yttrium nitride
Dispersion strengthened
Mechanical milling
Ferritic steel
Microstructure
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2016 Collection
 
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