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Effects of He radiation on cavity distribution and hardness of bulk nanolayered Cu-Nb composites
Yang, L. X.; Zheng, S. J.; Zhou, Y. T.; Zhang, J.; Wang, Y. Q.; Jiang, C. B.; Mara, N. A.; Beyerlein, I. J.; Ma, X. L.; Zheng, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
2017-04-01
Source PublicationJOURNAL OF NUCLEAR MATERIALS
ISSN0022-3115
Volume487Pages:311-316
AbstractInterface engineering is an important strategy for developing radiation tolerant materials. In prior work, bulk nanolayered composites fabricated by accumulative roll bonding (ARB) showed outstanding radiation resistance. However, the effects of layer thickness and radiation conditions on damage distributions and their effect on hardness have not been explored. Here, we use transmission electron microscopy (TEM) and nanoindentation to investigate the effects of radiation on the distribution of radiation-induced cavities and post-radiation hardness in ARB nanolayered Cu-Nb composites. We show that whether the cavities cross the interface depends on layer thickness and temperature, and that, remarkably, radiation could generate softening, not always hardening. We posit that the softening mainly results from the recovery of dislocations stored in the crystal after the bulk forming ARB processing due to He radiation and this phenomenon offsets radiation-induced hardening as layers become finer and temperatures rise. (C) 2017 Elsevier B.V. All rights reserved.; Interface engineering is an important strategy for developing radiation tolerant materials. In prior work, bulk nanolayered composites fabricated by accumulative roll bonding (ARB) showed outstanding radiation resistance. However, the effects of layer thickness and radiation conditions on damage distributions and their effect on hardness have not been explored. Here, we use transmission electron microscopy (TEM) and nanoindentation to investigate the effects of radiation on the distribution of radiation-induced cavities and post-radiation hardness in ARB nanolayered Cu-Nb composites. We show that whether the cavities cross the interface depends on layer thickness and temperature, and that, remarkably, radiation could generate softening, not always hardening. We posit that the softening mainly results from the recovery of dislocations stored in the crystal after the bulk forming ARB processing due to He radiation and this phenomenon offsets radiation-induced hardening as layers become finer and temperatures rise. (C) 2017 Elsevier B.V. All rights reserved.
description.department[yang, l. x. ; zheng, s. j. ; zhou, y. t. ; jiang, c. b. ; ma, x. l.] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china ; [zhang, j.] xiamen univ, sch energy res, xiamen 361005, peoples r china ; [wang, y. q. ; mara, n. a.] los alamos natl lab, lam inst mat sci, los alamos, nm 87545 usa ; [wang, y. q. ; mara, n. a.] los alamos natl lab, ctr integrated nanotechnol, los alamos, nm 87545 usa ; [beyerlein, i. j.] univ calif santa barbara, mech engn dept, mat dept, santa barbara, ca 93106 usa
KeywordInterface Cavity Softening Radiation Nanolayered Composite
Subject AreaMaterials Science, Multidisciplinary ; Nuclear Science & Technology
Funding OrganizationChinese Academy of Sciences; "Thousand Youth Talents Plan" of China; National Natural Science Foundation of China [51401208]; Shenyang National Laboratory for Materials Science [2015RP18]; U.S. Department of Energy [DE-AC52-06NA25396]
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/78207
Collection中国科学院金属研究所
Corresponding AuthorZheng, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
Recommended Citation
GB/T 7714
Yang, L. X.,Zheng, S. J.,Zhou, Y. T.,et al. Effects of He radiation on cavity distribution and hardness of bulk nanolayered Cu-Nb composites[J]. JOURNAL OF NUCLEAR MATERIALS,2017,487:311-316.
APA Yang, L. X..,Zheng, S. J..,Zhou, Y. T..,Zhang, J..,Wang, Y. Q..,...&Zheng, SJ .(2017).Effects of He radiation on cavity distribution and hardness of bulk nanolayered Cu-Nb composites.JOURNAL OF NUCLEAR MATERIALS,487,311-316.
MLA Yang, L. X.,et al."Effects of He radiation on cavity distribution and hardness of bulk nanolayered Cu-Nb composites".JOURNAL OF NUCLEAR MATERIALS 487(2017):311-316.
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