Mechanical properties and optimal grain size distribution profile of gradient grained nickel

Lin, Yan; Pan, Jie; Zhou, Haofei; Gao, Hongsheng; Li, Y.

doi:10.1016/j.actamat.2018.04.065

Cited by 184 publications

(55 citation statements)

References 57 publications

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“…Most GS materials reported thus far are related to grain-size gradient [27][28][29]65,[68][69][70]. A typical gradient structure consists of nano-grained or nanostructured surface layers and a coarse-grained central layer with grain-size gradient in-between [27,29].…”

Section: Gradient Structured (Gs) Materialsmentioning

confidence: 99%

Heterostructured materials: superior properties from hetero-zone interaction

Zhu

Ameyama

Anderson

et al. 2020

Materials Research Letters

598

135

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Heterostructured materials are an emerging class of materials with superior performances that are unattainable by their conventional homogeneous counterparts. They consist of heterogeneous zones with dramatic (> 100%) variations in mechanical and/or physical properties. The interaction in these hetero-zones produces a synergistic effect where the integrated property exceeds the prediction by the rule-of-mixtures. The heterostructured materials field explores heterostructures to control defect distributions, long-range internal stresses, and nonlinear inter-zone interactions for unprecedented performances. This paper is aimed to provide perspectives on this novel field, describe the state-of-the-art of heterostructured materials, and identify and discuss key issues that deserve additional studies. IMPACT STATEMENT This paper delineates heterostructured materials, which are emerging as a new class of materials with unprecedented properties, new materials science and economic industrial production.

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Section: Gradient Structured (Gs) Materialsmentioning

confidence: 99%

Heterostructured materials: superior properties from hetero-zone interaction

Zhu

Ameyama

Anderson

et al. 2020

Materials Research Letters

598

135

View full text Add to dashboard Cite

show abstract

“…Many studies have reported that the FWHM values can be used to judge the grain size of the tested materials semi-quantitatively according to the Scherrer equation. Larger FWHM values infers broadening in the diffraction peaks, which denotes a decrease in the surface grain size [24,25]. Herein, the FWHM values of the typical three strongest peaks of the SNC-treated alloy are larger than that of the conform alloy (shown in the Table 2).…”

Section: Influential Mechanism Of Snc On the Corrosion Behavior Of Thmentioning

confidence: 85%

Effect of Surface Nanocrystallization on Corrosion Resistance of the Conformed Cu-0.4%Mg Alloy in NaCl Solution

Song

Jiang

Guan

et al. 2018

Metals

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Surface nano-crystallization (SNC) of a conform-extruded Cu-0.4 wt.% Mg alloy was successfully conducted by high-speed rotating wire-brushing to obtain the deformed zone with dislocation cells and nanocrystallines. SNC promotes the anodic dissolution and corrosion rate of the Cu-Mg alloy in the initial stage of immersion corrosion in 0.1 M NaCl solution. The weakened corrosion resistance is mainly attributed to the higher corrosion activity of SNC-treated alloy. With extending the immersion time, the SNC-treated alloy slows the corrosion rate dramatically and exhibits uniform dissolution of the surface. The formation of the dense corrosion products leads to the improvement of overall corrosion performance. It indicates that the SNC-treated Cu-Mg alloy can function reliably for a longer duration in a corrosive environment.

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“…The above-mentioned experimental evidences have shown that the enhanced mechanical properties (uniaxial tensile, dynamic and fatigue) can be achieved by the gradient structure, while the detailed mechanisms underlying the observed mechanical behaviors still need further investigations and how the mechanical properties can be optimized in the gradient structure need be clarified by theoretical and numerical modeling. In the past decade, several approaches (i.e., dislocation density-based continuum plasticity modeling [48,54,55], dislocation mechanism-based size-dependent crystal plasticity modeling [64], Crystal plasticity finite element modeling [65] and molecular dynamics (MD) simulation [60]) have been utilized to understand the strengthening and strain hardening behaviors. Li et al [48,54] have developed a dislocation density-based continuum plasticity model to reveal the extra strain hardening behaviors in the gradient structure of IF steel, in which the nonuniform deformation of the lateral surface, the interaction of different layers along the depth, GNDs and back stress were considered (Figure 11).…”

Section: Theoretical and Numerical Work For Gradient Structuresmentioning

confidence: 99%

“…These theoretical simulation results have indicated that the dynamic properties of the gradient nanotwinned austenite stainless steels are highly sensitive to the twin spacing and the twin volume fraction, and this mechanism-based dynamic plastic model can be used to well predict the plastic response of the gradient nanotwinned metals under a wide range of strain rates. Lin et al [60] have combined experimental observations and molecular dynamic simulations to reveal the optimal grain size distribution profile of the gradient structure. The results have indicated that the surface roughening of CGs and strain localization of NS grains can be effectively suppressed by the interaction between CG grains and NS grains, resulting in the observed strong strain hardening and the superior uniform elongation.…”

Section: Theoretical and Numerical Work For Gradient Structuresmentioning

confidence: 99%

A Review on Heterogeneous Nanostructures: A Strategy for Superior Mechanical Properties in Metals

Yang

Yuan

et al. 2019

Metals

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Generally, strength and ductility are mutually exclusive in homogeneous metals. Nanostructured metals can have much higher strength when compared to their coarse-grained counterparts, while simple microstructure refinement to nanoscale generally results in poor strain hardening and limited ductility. In recent years, heterogeneous nanostructures in metals have been proven to be a new strategy to achieve unprecedented mechanical properties that are not accessible to their homogeneous counterparts. Here, we review recent advances in overcoming this strength–ductility trade-off by the designs of several heterogeneous nanostructures in metals: heterogeneous grain/lamellar/phase structures, gradient structure, nanotwinned structure and structure with nanoprecipitates. These structural heterogeneities can induce stress/strain partitioning between domains with dramatically different strengths, strain gradients and geometrically necessary dislocations near domain interfaces, and back-stress strengthening/hardening for high strength and large ductility. This review also provides the guideline for optimizing the mechanical properties in heterogeneous nanostructures by highlighting future challenges and opportunities.

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Mechanical properties and optimal grain size distribution profile of gradient grained nickel

Cited by 184 publications

References 57 publications

Heterostructured materials: superior properties from hetero-zone interaction

Heterostructured materials: superior properties from hetero-zone interaction

Effect of Surface Nanocrystallization on Corrosion Resistance of the Conformed Cu-0.4%Mg Alloy in NaCl Solution

A Review on Heterogeneous Nanostructures: A Strategy for Superior Mechanical Properties in Metals

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