球磨转速对含钆ODS钢中M<sub>23</sub>C<sub>6</sub>析出的影响研究

doi:10.11896/cldb.22030003

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Abstract The gadolinium-containing oxide dispersion strengthening (ODS) alloy, which will promisingly be with good neutron shielding performance and elevated-temperature mechanical properties, can be used as one of the shielding materials for the small modular lead-cooled fast reactor. The gadolinium-containing ODS-316L steel was prepared through the powder metallurgy process of mechanical alloying-spark plasma sintering. It was found that the speed of ball-milling affected the types of precipitated phases in the steel. Nano-sized Gd-Si-O precipitates distributed in the ODS-316L steel at a low ball-milling speed of 220 r/min, while hundred-nanometers sized M₂₃C₆ clusters and Gd-Si-O precipitates both distributed in the steel fabricated with high ball-milling speed of 300 r/min. A certain number of nanometer gadolinium-containing oxides distributed in M₂₃C₆ clusters. The segregation of elements and the accumulation of internal stress caused by the high ball-milling speed in as-milled powders were conducive to the nucleation of M₂₃C₆ precipitates, and the temperature of the powder sintering process provided a driving force for the growth of M₂₃C₆ precipitates. This study can provide certain experimental experience and theoretical foundation for the microstructure control of powder metallurgy gadolinium-containing ODS-316L steel.

Key words： neutron shielding alloy gadolinium-containing oxide dispersion strengthening steel powder metallurgy ball mill speed M₂₃C₆ precipitates

Published: 10 September 2023 Online: 2023-09-05

CLC number:	TL344
	TF124

Fund:National Key Research and Development Program of China (2020YFB1901900), the International Partnership Program of Chinese Academy of Sciences (116134KYSB20200056) and the Project of the ‘115’ Industrial Innovation Team of Anhui Province.

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	YANG Xinyi
	HUANG Qunying

Cite this article:

YANG Xinyi,HUANG Qunying. Effect of Ball Milling Speed on Precipitation of M₂₃C₆ in Gadolinium-containing ODS Steel[J]. Materials Reports, 2023, 37(17): 22030003-6.

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http://www.mater-rep.com/EN/10.11896/cldb.22030003 OR http://www.mater-rep.com/EN/Y2023/V37/I17/22030003

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