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Title: Ion-irradiation-induced microstructural modifications in ferritic/martensitic steel T91

Abstract

In this paper, in situ transmission electron microscopy investigations were carried out to study the microstructural evolution of ferritic/martensitic steel T91 under 1 MeV Krypton ion irradiation up to 4.2 x 10(15) ions/cm(2) at 573 K, 673 K, and 773 K. At 573 K, grown-in defects are strongly modified by black dot loops, and dislocation networks together with black-dot loops were observed after irradiation. At 673 K and 773 K, grown-in defects are only partially modified by dislocation loops; isolated loops and dislocation segments were commonly found after irradiation. Post irradiation examination indicates that at 4.2 x 1015 ions/cm(2), about 51% of the loops were a(0)/2 < 111 > type for the 673 K irradiation, and the dominant loop type was a(0)< 100 > for the 773 K irradiation. Finally, a dispersed barrier hardening model was employed to estimate the change in yield strength, and the calculated ion data were found to follow the similar trend as the existing neutron data with an offset of 100-150 MPa. (C) 2017 Elsevier B.V. All rights reserved.

Authors:
ORCiD logo; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1411439
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Nuclear Materials; Journal Volume: 490; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Liu, Xiang, Miao, Yinbin, Li, Meimei, Kirk, Marquis A., Maloy, Stuart A., and Stubbins, James F. Ion-irradiation-induced microstructural modifications in ferritic/martensitic steel T91. United States: N. p., 2017. Web. doi:10.1016/j.jnucmat.2017.04.047.
Liu, Xiang, Miao, Yinbin, Li, Meimei, Kirk, Marquis A., Maloy, Stuart A., & Stubbins, James F. Ion-irradiation-induced microstructural modifications in ferritic/martensitic steel T91. United States. doi:10.1016/j.jnucmat.2017.04.047.
Liu, Xiang, Miao, Yinbin, Li, Meimei, Kirk, Marquis A., Maloy, Stuart A., and Stubbins, James F. Sat . "Ion-irradiation-induced microstructural modifications in ferritic/martensitic steel T91". United States. doi:10.1016/j.jnucmat.2017.04.047.
@article{osti_1411439,
title = {Ion-irradiation-induced microstructural modifications in ferritic/martensitic steel T91},
author = {Liu, Xiang and Miao, Yinbin and Li, Meimei and Kirk, Marquis A. and Maloy, Stuart A. and Stubbins, James F.},
abstractNote = {In this paper, in situ transmission electron microscopy investigations were carried out to study the microstructural evolution of ferritic/martensitic steel T91 under 1 MeV Krypton ion irradiation up to 4.2 x 10(15) ions/cm(2) at 573 K, 673 K, and 773 K. At 573 K, grown-in defects are strongly modified by black dot loops, and dislocation networks together with black-dot loops were observed after irradiation. At 673 K and 773 K, grown-in defects are only partially modified by dislocation loops; isolated loops and dislocation segments were commonly found after irradiation. Post irradiation examination indicates that at 4.2 x 1015 ions/cm(2), about 51% of the loops were a(0)/2 < 111 > type for the 673 K irradiation, and the dominant loop type was a(0)< 100 > for the 773 K irradiation. Finally, a dispersed barrier hardening model was employed to estimate the change in yield strength, and the calculated ion data were found to follow the similar trend as the existing neutron data with an offset of 100-150 MPa. (C) 2017 Elsevier B.V. All rights reserved.},
doi = {10.1016/j.jnucmat.2017.04.047},
journal = {Journal of Nuclear Materials},
number = C,
volume = 490,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 2017},
month = {Sat Jul 01 00:00:00 EDT 2017}
}