Thermal stability and deformability of annealed nanotwinned Al/Ti multilayers

Zhang, Y.F.; Su, Rong; Niu, Tongjun; Richter, Nicholas A.; Xue, Sichuang; Li, Q.; Ding, Jie; Yang, Bo; Wang, H.; Zhang, X.

doi:10.1016/j.scriptamat.2020.04.015

Cited by 29 publications

(9 citation statements)

References 47 publications

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“…The 0001 direction is per-pendicular to the crystalline/amorphous interfaces, which is built according to the Ti-based nano-multilayers obtained in experiment. [9,13] The details of the crystalline Ti are shown in the inserted picture in the upper right corner of Fig. 1.…”

Section: Simulation Model and Methodsmentioning

confidence: 99%

“…It should be mentioned that the FCC-Ti has also been observed in simulation [67] and experiments. [9,13,68] Figure 8(c) shows the crystallographic orientations between HCP-Ti twin variant and the BCC-Ti, and the details of the transformation are presented in Fig. 8(e).…”

Section: Plastic Deformation Mechanism In Crystalline Phasementioning

confidence: 99%

“…For the samples with smaller thickness, the main plastic deformation mechanism of the crystalline phase is the transformation from HCP-Ti to FCC-Ti and BCC-Ti. [9,13,68,70] For the Ti/TiCu DPNLs with larger thickness, the transition from HCP-Ti to FCC-Ti and BCC-Ti and the later transition from FCC-Ti to HCP-Ti dominate the plastic deformation. For the samples with moderate layer thickness, the plasticity deformation of the crystalline part is mainly the transformation from HCP-Ti to FCC-Ti and BCC-Ti, and subsequent transformation from FCC-Ti to HCP-Ti, in which the transformation degree is between the smaller and larger samples.…”

Section: Size Effect On the Mechanical Behavior Of Ti/ticu Dpnlsmentioning

confidence: 99%

“…[7,8] Especially, the nanolaminate structures can possess the advantages of the components used in the nanolaminates, and even obtain some unexpected achievements. [9][10][11][12][13][14] For example, the nanotwinned Al/Ti multilayers exhibited compressive strength up to 2.4 GPa, good hardness and work hardening capability, which was much higher than the pure Ti and Al. [12] In addition, the annealed Al/Ti nanolaminates possessed high flow stress (exceeding 3 GPa), work hardening capability, and good deformability.…”

Section: Introductionmentioning

confidence: 99%

“…[12] In addition, the annealed Al/Ti nanolaminates possessed high flow stress (exceeding 3 GPa), work hardening capability, and good deformability. [13] The crystalline/crystalline interface (CCI) plays an important role in the improvement of the mechanical properties of the nanolaminates, but the stress often concentrates in the interphase interface, which may induce the nano-void in nanolam-inates.…”

Section: Introductionmentioning

confidence: 99%

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Layer thickness dependent plastic deformation mechanism in Ti/TiCu dual-phase nano-laminates

et al. 2023

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Crystalline/amorphous nanolaminate is an effective strategy to improve the mechanical properties of metallic materials, but the underlying deformation mechanism is still under the way of exploring. Here, the mechanical properties and plastic deformation mechanism of Ti/TiCu dual-phase nanolaminates (DPNLs) with different layer thickness are investigated using molecular dynamics simulations. The results indicate that the influence of the layer thickness on the plastic deformation mechanism in crystalline layer is negligible, while it affects the plastic deformation mechanism of amorphous layers distinctly. The crystallization of amorphous TiCu is exhibited in amorphous parts of the Ti/TiCu DPNLs, which is inversely proportional to the layer thickness. It is observed that the crystallization of the amorphous TiCu is a process driven by stress and heat. The Young’s modulus for the Ti/TiCu DPNLs are higher than that of composite material due to the amorphous/crystalline interfaces. Furthermore, the main plastic deformation mechanism in crystalline part: grain reorientation, transformation from hexagonal-close-packed-Ti to face-centered cubic-Ti and body-centered cubic-Ti, has also been displayed in present work. The results may provide a guideline for the design of high-performance Ti and its alloy.

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Section: Simulation Model and Methodsmentioning

confidence: 99%