Hierarchical nanotwins in single-crystal-like nickel with high strength and corrosion resistance produced<i>via</i>a hybrid technique

Li, Qiang; Xue, Sichuang; Price, Patrick; Sun, Xing; Ding, Jie; Shang, Zhongxia; Fan, Zhe; Wang, Han; Zhang, Yifan; Chen, Youxing; Wang, Haiyan; Hattar, Khalid Mikhiel; Zhang, Xinghang

doi:10.1039/c9nr07472d

Cited by 30 publications

(17 citation statements)

References 93 publications

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“… Variation in the yield strength with average grain size or twin thickness for Ni and Mo-microalloyed NT-Ni (1.3 at. %), along with literature data directly obtained by tensile and compression tests for electrodeposited (ED) Ni, Ni pillars, ED NT-Ni ( 22 , 24 – 33 , 53 , 54 ), and NT-Cu ( 2 ). Continuous strengthening behavior extending to twin thickness of 2.9 and 1.9 nm is observed in the as-deposited NT-Ni and Mo-microalloyed NT-Ni specimens, respectively.…”

Section: Resultsmentioning

confidence: 99%

Ultrastrong nanotwinned pure nickel with extremely fine twin thickness

et al. 2021

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The strength of nanocrystalline and nanotwinned metals stops increasing or even starts decreasing when their grain size or twin thickness is below a critical size—a phenomenon known as Hall-Petch breakdown—which hinders the attainment of ultrahigh strength. Here, we report continuous strengthening in nanotwinned pure Ni with twin thicknesses ranging from 81.0 to 2.9 nm. An unprecedented strength of 4.0 GPa was achieved at extremely fine twin thickness of 2.9 nm, which is about 12 times stronger than that of conventional coarse-grained nickel. This ultrahigh strength arises from the excellent stability of twin boundaries and their strong impedance to dislocation motion. In particular, we find that secondary nanotwins are activated to sustain plastic deformation, which also contribute to the high strength. These results not only advance the understanding of the strengthening mechanisms in nanotwinned metals but also offer an alternative pathway to develop engineering materials with ultrahigh strength.

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Section: Resultsmentioning

confidence: 99%

Ultrastrong nanotwinned pure nickel with extremely fine twin thickness

et al. 2021

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“…From the aforementioned applications of metallic coating and thin films, it is realized that their fabrication often relies on non-equilibrium routes, such as a variety of ultrahigh vacuum techniques and electrodeposition/electroplating. The energetic adatoms landing on the substrate often first form nanometric epitaxial zone and then become 3D clusters during the growth process [8]. Moreover, the sophisticated compositions or the interaction between matrix atoms and impurity atoms as dopants and alloying elements often exert pinning effects.…”

Section: Metallic Thin Filmsmentioning

confidence: 99%

“…The proportionality constant, C,is dependent on the deformation mode under indentation and it had been empirically determined that H/σ≈2:7 for materials with high strain hardening coefficient and yield strength (elastic-plastic transition mode). This indicates the 2D metallic thin films with columnar GBs possess substantial structural anisotropy, despite the crystal anisotropy governed by either Schmid factor or Taylor factor [2,8]. Metallic coatings or thin films have been used as protective, reflective, conductive components on apparatuses and devices.…”

Section: Anisotropy In Metallic 2d Thin Filmsmentioning

confidence: 99%

“…Furthermore, it should be noted that not all the metallic thin films prepared by non-equilibrium methods possessed the conventional columnar GBs. Li et al recently exhibited that manipulation of electrolytic solution with certain organic additive could potentially transfer the 3D cluster growth to a flat 2D layer-by-layer growth mode to facilitate the formation of TBs and suppress the formation of the columnar GBs from the island coalescence process [8]. The anisotropy of the NT metals mainly constructed by horizontal CTBs needs further investigation.…”

Section: Mechanical Anisotropy In Al-fe Thin Filmsmentioning

confidence: 99%

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Anisotropic Mechanical Properties of 2-D Materials

Li¹

2021

Plastic Deformation in Materials [Working Title]

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While prior reviews and research articles focused on the various synthetic routes and microstructural controls of 2D nanomaterials as well as their functional applications, this chapter discloses the anisotropic behaviors of 2D materials and puts emphasis on the mechanical anisotropy of three distinct 2D materials, namely graphene, MoS2 and Al alloy coating, representative of carbon, inorganic and metallic 2D crystalline materials. Except for the relatively low interlayer cohesive stress, the in-plane anisotropy of the former two materials classes is subjected primarily to the hexagonal structure of the unit cells of the graphene and MoS2. The anisotropy of metallic thin films with high-density grain boundaries with preferential directionality, rendered by the non-equilibrium synthetic methods, results from both the conventional Taylor factor and the directionality of the grain boundaries. Despite 2D materials’ wide spectrum of applications, such as electronics, energy devices, sensors, coating etc., the mechanical anisotropy could be critical for certain mechanical applications, such as friction, and provide instructions on the durability, reliability and property optimization in the various applications of different 2D materials.

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“…Dalam pelaksanaannya, adhesive bonding memerlukan waktu curing yang lama, sehingga pengerjaan menjadi tidak efisien dan efektif, selain itu, zat adhesive pada adhesive bonding tidak tahan suhu tinggi, sehingga joining dengan metode ini akan membatasi pada penggunannya. [4][5][6] Pada umumnya jika penyambungan menggunakan mechanical joining terdapat dua masalah utama. Yaitu waktu yang diperlukan untuk membuat lubang pada sheet dan terdapat adanya konsentrasi tegangan pada sambungan yang mana mempengaruhi property mekanikal dari struktur.…”

Section: Pendahuluanunclassified

Pengaruh Clamping Frame Kayu Meranti dan ASTM A36 pada Friction Spot Joining AL 1100 dan PVC

Raharjo

Hamidi

Widodo

et al. 2020

JRM

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In this paper, the effect of welding parameters on the shear strength of Al-PVC hybrid structures was discussed. This Research developed welding parameters in the form of Plunge Depth, heating time, and clamping frame materials. By these different parameters would result in different shear strength of welded materials. Following optimization of the process, a detailed comparison of the properties and microstructures of two different materials (meranti wood and ASTM A36 Steel) would affect to different values of thermal conductivity. The Aluminum used was Al 1100, which was welded by using a friction stir spot welding method with Polyvinyl Chloride (PVC). In this study, by the different heating times, the shear test was carried out with the ASTM D3163 standard. In this study, it was found that the maximum temperature of Aluminum occurs during the 2 nd second of the welding process and then decreased in the 5 th second until 60 th second. However, the optimum shear strength found at 20 th second. Following heat transfer and degradation materials, the 2mm plunge depth has a higher temperature and higher shear strength than 1,5mm plunge depth. Differences in the response of the two depth were attributed to the difference in mechanical interlocking. This study found that the ASTM A36 clamping frame maximum shear load of 182.4 N is higher than meranti wood frame of 125.5 N. Differences in these value are attributed to the differences of the thermal conductivity, which meranti wood had a lower thermal conductivity than ASTM A36. These have findings significant implications for the commercial application of welding hybrid structures. The best way to take advantage of the benefit of AL-PVC Structure Hybrid for friction stir spot welding would appear to be 20 second heating time, 2mm plunge depth with ASTM clamping frame.

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Hierarchical nanotwins in single-crystal-like nickel with high strength and corrosion resistance producedviaa hybrid technique

Abstract: Single-crystal-like nanotwinned Nickel was prepared via a hybrid technique and it renders superb mechanical behaviors and corrosion resistance.

Cited by 30 publications

References 93 publications

Ultrastrong nanotwinned pure nickel with extremely fine twin thickness

Ultrastrong nanotwinned pure nickel with extremely fine twin thickness

Anisotropic Mechanical Properties of 2-D Materials

Pengaruh Clamping Frame Kayu Meranti dan ASTM A36 pada Friction Spot Joining AL 1100 dan PVC

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