@article{57838e9d896c419486f38d9d066edda8,
title = "He ion irradiation response of a gradient T91 steel",
abstract = "Metallic materials with a gradient microstructure usually exhibit excellent mechanical properties. However, the radiation response of gradient structural materials is less well understood. Here, room-temperature He ion irradiation up to \textasciitilde{}4.5 dpa with \textasciitilde{}10 at\% He injection was performed on a gradient T91 steel processed by surface severe plastic deformation. In comparison to the coarse-grained ferritic T91, the gradient T91 with the nanocrystalline layers shows improved radiation tolerance in terms of less bubble swelling and radiation hardening. Additionally, bubble distribution along grain boundaries depends on misorientation angle suggesting a strong capacity of non-equilibrium grain boundaries in storing He atoms. The present study provides insight into the design of radiation tolerant gradient steels for nuclear industry applications.",
keywords = "Gradient microstructures, Grain boundary misorientation, He bubbles, Irradiation-induced hardening, T91 steel",
author = "Zhongxia Shang and Jie Ding and Cuncai Fan and Di Chen and Jin Li and Yifan Zhang and Yongqiang Wang and Haiyan Wang and Xinghang Zhang",
note = "Funding Information: This work is primarily supported by NSF-DMR 1611380. JD acknowledges partial support by DOE-Nuclear Energy under DE-NE0008787. CF also acknowledges financial support by NSF-CMMI-1728419. We acknowledge accesses to the ion irradiation facility and microscopy center at the DOE-Center for Integrated Nanotechnologies. The ion irradiation was performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy's NNSA, under contract 89233218CNA000001. Accesses to the Microscopy Centers at Life Science and School of Materials Engineering at Purdue University are also acknowledged. Funding Information: This work is primarily supported by NSF - DMR 1611380 . JD acknowledges partial support by DOE -Nuclear Energy under DE-NE0008787 . CF also acknowledges financial support by NSF - CMMI-1728419 . We acknowledge accesses to the ion irradiation facility and microscopy center at the DOE-Center for Integrated Nanotechnologies. The ion irradiation was performed at the Center for Integrated Nanotechnologies, an Office of Science User Facility operated for the U.S. Department of Energy (DOE) Office of Science. Los Alamos National Laboratory, an affirmative action equal opportunity employer, is managed by Triad National Security, LLC for the U.S. Department of Energy{\textquoteright}s NNSA, under contract 89233218CNA000001. Accesses to the Microscopy Centers at Life Science and School of Materials Engineering at Purdue University are also acknowledged. Publisher Copyright: {\textcopyright} 2020 Acta Materialia Inc.",
year = "2020",
month = sep,
day = "1",
doi = "10.1016/j.actamat.2020.06.019",
language = "English",
volume = "196",
pages = "175--190",
journal = "Acta Materialia",
issn = "1359-6454",
publisher = "Acta Materialia Inc",
}