Duan, Jiaqi, Wen, Haiming, He, Li, Sridharan, Kumar, Hoffman, Andrew, Arivu, Maalavan, He, Xiaoqing, Islamgaliev, Rinat and Valiev, Ruslan (2022) Effect of grain size on the irradiation response of grade 91 steel subjected to Fe ion irradiation at 300 °C. Journal of Materials Science, 57 (28). pp. 13767-13778. doi:10.1007/s10853-022-07480-6 ISSN 0022-2461.

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Abstract

Irradiation using Fe ion at 300 °C up to 100 dpa was carried out on three variants of Grade 91 (G91) steel samples with different grain size ranges: fine-grained (FG, with blocky grains of a few micrometers long and a few hundred nanometers wide), ultrafine-grained (UFG, grain size of ~ 400 nm) and nanocrystalline (NC, lath grains of ~ 200 nm long and ~ 80 nm wide). Electron microscopy investigations indicate that NC G91 exhibit higher resistance to irradiation-induced defect formation than FG and UFG G91. In addition, nano-indentation studies reveal that irradiation-induced hardening is significantly lower in NC G91 than that in FG and UFG G91. Effective mitigation of irradiation damage was achieved in NC G91 steel in the current irradiation condition.

Item Type:	Journal Article
Divisions:	Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Journal or Publication Title:	Journal of Materials Science
Publisher:	Springer
ISSN:	0022-2461
Official Date:	July 2022
Dates:	Date Event July 2022 Published 14 July 2022 Available 22 June 2022 Accepted
Volume:	57
Number:	28
Page Range:	pp. 13767-13778
DOI:	10.1007/s10853-022-07480-6
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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