Effects of He radiation on cavity distribution and hardness of bulk nanolayered Cu-Nb composites

IMR OpenIR

	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
发表期刊	JOURNAL OF NUCLEAR MATERIALS
ISSN	0022-3115
卷号	487 页码:311-316
摘要	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.; 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.
部门归属	[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
关键词	Interface Cavity Softening Radiation Nanolayered Composite
学科领域	Materials Science, Multidisciplinary ; Nuclear Science & Technology
资助者	Chinese 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]
收录类别	SCI
语种	英语
WOS记录号	WOS:000399506900036
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/78207
专题	中国科学院金属研究所
通讯作者	Zheng, SJ (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China.
推荐引用方式 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.