He implantation of bulk Cu–Nb nanocomposites fabricated by accumulated roll bonding

Han, Wei‐Zhong; Mara, Nathan A.; Wang, Y. Q.; Misra, Amit; Demkowicz, Michael J.

doi:10.1016/j.jnucmat.2014.04.034

Cited by 51 publications

(21 citation statements)

References 28 publications

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“…It involves multiple cycles of rolling, cutting and stacking and rerolling. Recent studies have shown that bulk Cu/Nb nanolayered sheets fabricated by ARB exhibit excellent irradiation tolerance [3,4,8,26,27], shock resistance [28], and thermal stability [29,30], as well as an ultra-high strength [31]. These desirable properties have been attributed to the unusually high density of Cu/Nb interfaces and the low density of accumulated defects in the layers [7].…”

Section: Introductionmentioning

confidence: 99%

High strength and thermal stability of bulk Cu/Ta nanolamellar multilayers fabricated by cross accumulative roll bonding

et al. 2016

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Section: Introductionmentioning

confidence: 99%

High strength and thermal stability of bulk Cu/Ta nanolamellar multilayers fabricated by cross accumulative roll bonding

et al. 2016

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“…PVD metal multilayers have been used to study the interaction of He with a variety of interfaces, including Cu-Nb [18][19][20][21][22], Cu-V [6,23], Cu-Mo [24], Al-Nb [25] and Fe-W [26]. Recently, studies on He behavior at interfaces in bulk-scale Cu-Nb nanocomposites synthesized by accumulative roll bonding have also been performed [27,28].…”

Section: Introductionmentioning

confidence: 99%

Imaging the in-plane distribution of helium precipitates at a Cu/V interface

Chen

Yuryev

et al. 2017

Materials Research Letters

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We describe a transmission electron microscopy investigation of the distribution of helium precipitates within the plane of an interface between Cu and V. Statistical analysis of precipitate locations reveals a weak tendency for interfacial precipitates to align along 110 -type crystallographic directions within the Cu layer. Comparison of these findings with helium-free Cu/V interfaces suggests that the precipitates may be aggregating preferentially along atomic-size steps in the interface created by threading dislocations in the Cu layer. Our observations also suggest that some precipitates may be aggregating along intersections between interfacial misfit dislocations. IMPACT STATEMENTThe innovation of this paper is providing the first plane-view experimental images of in-plane helium precipitate distributions at an interface between physical vapor deposited face-centered cubic (fcc) and body-centered cubic (bcc) metals. ARTICLE HISTORY

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“…Nevertheless, recent studies have concluded that the ARB material has a trapping efficiency for point defects similar to that of the PVD-grown material [31,32], and it is therefore reasonable to suppose that they will also be good traps for He. In addition to studying the ARB directly, we also investigate ARB Cu-Nb material that has been subjected to subsequent treatment by HPT.…”

Section: Introductionmentioning

confidence: 99%

Role of interfaces on the trapping of He in 2D and 3D Cu–Nb nanocomposites

Ekiz

Averback

Mara

et al. 2015

Journal of Nuclear Materials

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The role of interface structure on the trapping of He in Cu-Nb nanocomposites was investigated by comparing He bubble formation in nano-multilayers grown by PVD, nanolaminates fabricated by accumulative roll bonding (ARB), and 3D nanocomposites obtained by high pressure torsion (HPT). All samples were implanted with 1 MeV He ions at room temperature and characterized by cross section transmission electron microscopy (TEM). The critical He concentration leading to bubble formation was determined by correlating the He bubble depth distribution detected by TEM with the implanted He depth profile obtained by SRIM. The critical He dose per unit interfacial area for bubble formation was largest for the PVD multilayers, lower by a factor of ~1.4 in the HPT nanocomposites annealed at 500 ˚C, and lower by a factor of ~4.6 in the ARB nanolaminates relative to the PVD multilayers. The results indicate that the (111)FCC||(110)BCC Kurdjumov-Sachs (KS) interfaces predominant in PVD and annealed HPT samples provide more effective traps than the (112)KS interfaces predominant in ARB nanolaminates; however, the good trapping efficiency and high interface area of 3D HPT structures make them most attractive for applications.

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He implantation of bulk Cu–Nb nanocomposites fabricated by accumulated roll bonding

Cited by 51 publications

References 28 publications

High strength and thermal stability of bulk Cu/Ta nanolamellar multilayers fabricated by cross accumulative roll bonding

High strength and thermal stability of bulk Cu/Ta nanolamellar multilayers fabricated by cross accumulative roll bonding

Imaging the in-plane distribution of helium precipitates at a Cu/V interface

Role of interfaces on the trapping of He in 2D and 3D Cu–Nb nanocomposites

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