Effect of interface structure on dislocation glide behavior in nanolaminates

Jian, Wu-Rong; Su, Yanqing; Xu, Shuozhi; Ji, Weisen; Beyerlein, Irene J.

doi:10.1557/s43578-021-00261-y

Cited by 9 publications

(7 citation statements)

References 91 publications

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“…The initial peak stress in both SC-Ag and FS-Ag is significantly lower than in the nanolaminated Ag, being around 4 MPa for SC-Ag and 5.7 MPa for FS-Ag. In a Cu single crystal, it was also found that the SC model has a lower critical stress than the FS model [ 14 ]. The primary resistance to dislocation motion in the SC-Ag comes from the lattice itself.…”

Section: Results and Discussionmentioning

confidence: 99%

“…In these layers, the x , y , and z axes denote coordinates for layer M , while

, and

pertain to layer

. We have applied PBCs along the x (or

) and y (or

) axes, while traction-free boundary conditions are implemented along the z (or

) axis [ 14 , 47 , 48 , 49 ]. The crystallographic orientations are shown in Table 1 .…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Table 2 summarizes the interfacial energies of the three distinct interfaces. In each case, the most stable interface was identified following the steps in our previous work [ 14 ].…”

Section: Materials and Methodsmentioning

confidence: 99%

“…These materials not only have impressive strength and exceptional stability during mechanical deformation [ 1 , 2 , 3 ], but also demonstrate enhanced resistance to irradiation [ 4 , 5 ], fatigue [ 6 ], and shock [ 7 ] compared with traditional metals. Among those that have been investigated, the layers of nanolaminates can either consist of the same material, as seen in nanotwinned Cu [ 8 , 9 ] and nanotwinned Ag [ 10 ], or they can be made from different materials, such as Cu/Ag [ 11 , 12 ] and Cu/Nb [ 13 , 14 , 15 ] bimetal nanolaminates. Metals like Ag and Cu, as well as the nanolayers comprising them, have some specific features that make them important.…”

Section: Introductionmentioning

confidence: 99%

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Confined Layer Slip Process in Nanolaminated Ag and Two Ag/Cu Nanolaminates

Fani,

Jian,

et al. 2024

Materials

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The exceptional strength of nanolaminates is attributed to the influence of their fine stratification on the movement of dislocations. Through atomistic simulations, the impact of interfacial structure on the dynamics of an edge dislocation, which is compelled to move within a nanoscale layer of a nanolaminate, is examined for three different nanolaminates. In this study, we model confined layer slip in three structures: nanolaminated Ag and two types of Ag/Cu nanolaminates. We find that the glide motion is jerky in the presence of incoherent interfaces characterized by distinct arrays of misfit dislocations. In addition, the glide planes exhibit varying levels of resistance to dislocation motion, where planes with intersection lines that coincide with misfit dislocation lines experience greater resistance than planes without such intersection lines.

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Section: Results and Discussionmentioning

confidence: 99%

“…In these layers, the x , y , and z axes denote coordinates for layer M , while

, and

pertain to layer

. We have applied PBCs along the x (or

) and y (or

) axes, while traction-free boundary conditions are implemented along the z (or

) axis [ 14 , 47 , 48 , 49 ]. The crystallographic orientations are shown in Table 1 .…”

Section: Materials and Methodsmentioning

confidence: 99%

“…Table 2 summarizes the interfacial energies of the three distinct interfaces. In each case, the most stable interface was identified following the steps in our previous work [ 14 ].…”

Section: Materials and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Confined Layer Slip Process in Nanolaminated Ag and Two Ag/Cu Nanolaminates

Fani,

Jian,

et al. 2024

Materials

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“…To investigate the effect of interface structure on CLS motion, MD was applied to h = 5 nm Cu/Nb nanolaminates and nanotwinned Cu or Nb. Glide behavior was jerky for the semicoherent Cu/Nb interface, due to interactions with discrete misfit dislocation arrays in the interface (Figure 7b) (42). In contrast, the coherent interfaces in the nanotwinned material posed substantially less glide resistance, and CLS glide was smooth.…”

Section: Blocking and Restricting Dislocation Motionmentioning

confidence: 99%

Mechanical Properties of Metal Nanolaminates

Beyerlein

Mara

2022

Annu. Rev. Mater. Res.

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This article reviews recent basic research on two categories of metal-based nanolaminates: those composed of metal/metal constituents and those composed of metal/ceramic constituents. We focus primarily on studies that aim to understand—via experiments, modeling, or both—the biphase interface structure and its role in changing the mechanisms that govern strength and deformability at a fundamental level. We anticipate that, by providing a broad perspective on the latest advances in nanolaminates, this review will aid design of new metallic materials with unprecedented combinations of mechanical and physical properties.

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