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Abstract The influence of Ti, a low activation alloying element, on the microstructure and mechanical properties was investigated of reduced activation ferritic–martensitic (RAFM) steel containing Ti instead of Ta, The… Click to show full abstract
Abstract The influence of Ti, a low activation alloying element, on the microstructure and mechanical properties was investigated of reduced activation ferritic–martensitic (RAFM) steel containing Ti instead of Ta, The steel design with Ti was based on thermodynamic calculations of phase equilibria. All samples were normalized at 1000 °C for 1 h and tempered at 650 °C and 750 °C for 2 h, which resulted in tempered martensite with M 23 C 6 carbides and MX precipitates. Ti-added RAFM steel tempered at 650 °C has fine M 23 C 6 carbides and nano-sized (Ti,W)C particles with about 20 nm, leading to a superior balance of strength and impact toughness, compared to the previous RAFM steels with Ta.
Journal Title: Fusion Engineering and Design
Year Published: 2017
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