|Effect of silicon on the microstructure and mechanical properties of reduced activation ferritic/martensitic steel|
|S. H.; Rong Chen, L. J.
|Source Publication||Journal of Nuclear Materials
|Abstract||The effect of Si in the range of 0.05-0.77 wt.% on the microstructure, tensile properties and impact toughness of reduced activation ferritic/martensitic (RAFM) steels has been investigated. An increase in Si content affected the prior austenite grain size resulting in an increase in the tensile strength at room temperature. The tensile strength of steels tested above 773 K did not change significantly with the addition of Si, which was due to the diminished carbide hardening effect and boundary strengthening effect. Detailed fractographic analysis revealed that tear fractures occurred in the samples tensile tested at room temperature, while cup and cone fractures were found in samples tensile tested at temperatures above 773 K, which were induced by the easing of dislocation pile-ups. The ductile-to-brittle transition temperature (DBTT) decreased when the Si content increased to 0.22 wt.%. However, the DBTT increased when the Si content reached 0.77 wt.% and this was due to the precipitation of Laves phase. The RAFM steel with approximately 0.22 wt.% Si content was found to possess an optimized combination of microstructure, tensile properties and impact toughness. (C) 2015 Elsevier B.V. All rights reserved.|
; rong, lijian] chinese acad sci, inst met res, key lab nucl mat & safety assessment, shenyang 110016, peoples r china.
; chen, sh (reprint author), chinese acad sci, inst met res, div mat special environm, 72 wenhua rd, shenyang 110016, peoples r china.
S. H.,Rong Chen, L. J.. Effect of silicon on the microstructure and mechanical properties of reduced activation ferritic/martensitic steel[J]. Journal of Nuclear Materials,2015,459:13-19.
S. H.,&Rong Chen, L. J..(2015).Effect of silicon on the microstructure and mechanical properties of reduced activation ferritic/martensitic steel.Journal of Nuclear Materials,459,13-19.
S. H.,et al."Effect of silicon on the microstructure and mechanical properties of reduced activation ferritic/martensitic steel".Journal of Nuclear Materials 459(2015):13-19.
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