Effect of tellurium on the microstructure and mechanical properties of Fe-14Cr oxide-dispersion-strengthened steels produced by additive manufacturing

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Conventionally, Te has primarily been used to improve the machinability of steel and its alloys. In this work, Te was used to refine the grains of an oxide-dispersion-strengthened (ODS) steel produced by additive manufacturing (AM) with fixed processing parameters. Addition of Te to the raw powder produced an ODS steel with a fine-grained microstructure, in contrast to the ODS steel manufactured without Te. Moreover, the addition of Te resulted in superior yield strength and ultimate tensile strength, which was attributed to the combined effects of grain refinement and the finer nanoparticles (NPs) composed of Te-rich composite NPs and Cr-rich NPs. For the first time, the AM technique was used to obtain grain and nanoparticle sizes of ~3.4 µm and 6 nm, respectively, from the Te-added ODS steel
Publisher
JOURNAL MATER SCI TECHNOL
Issue Date
2021-12
Language
English
Article Type
Article
Citation

JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY, v.95, pp.114 - 126

ISSN
1005-0302
DOI
10.1016/j.jmst.2021.03.068
URI
http://hdl.handle.net/10203/290813
Appears in Collection
NE-Journal Papers(저널논문)
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