Plasticity enhancement in Ni–P amorphous alloy/Ni/Zr-based metallic glass composites with a sandwich structure

Ren, L.W.; Yang, F.Q.; Jiao, Zhiming; Ye, Haifeng; Wang, Zhi Hua; Qiao, J.W.

doi:10.1016/j.msea.2015.06.092

Cited by 17 publications

(2 citation statements)

References 32 publications

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“…They used a thin soft Cu layer as a buffer to absorbing the deformation energy, and a strong outer Ni coating for geometric confinement effects [43]. Also, Ren et al used electrodeposition and chemical plating to prepare a Ni-P/Ni bilayer on Vit 1 BMG, forming an "amorphous-crystalline-amorphous" sandwiched structure to effectively improve the ductility of Zr-based BMG [44]. In these studies, the effectiveness of the coating in the geometric confinement of BMG alloys was considered closely related to the thickness of the coating.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Electroplating Nickel on the Mechanical Properties of Brittle Mg-Based Bulk Metallic Glasses

Zhang,

Li,

Jing

et al. 2023

Coatings

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Magnesium-based bulk metallic glasses (BMGs) are typical intrinsic brittle lightweight BMG alloys, and their improvement in plasticity has attracted widespread attention in the field of BMGs. We used the electroplating method to modify the surface of Mg59.5Cu22.9Ag11Gd6.6 BMGs and investigated the geometric confinement effect of the Ni coating on the mechanical properties of the BMG. The results show that under the plating conditions of adding 1 g/L nano Al2O3 to the plating solution, adjusting the plating temperature to 50 °C, and plating time to 3 h, a smooth and dense nickel coating with a thickness of about 150 μm can be formed on the surface of the Mg-based BMG. The uniaxial compression tests showed that the average fracture strength of the BMG was increased from 565 MPa to 598 MPa by a 50 μm Ni coating, and the fluctuation range of strength was decreased from 429 MPa to 265 MPa, a reduction of 36%. The Weibull analysis showed that the Weibull modulus m was increased from 4.3 to 4.8 by the coating, and the safety stress was increased from 54 MPa to 235 MPa, indicating that electroplating nickel could improve the reliability of the Mg-based BMG alloy. However, no significant improvement of the compression plasticity was found, which indicated that improving the room temperature plasticity of brittle Mg-based BMG alloys by the geometric confinement of electroplating Ni was limited. The influence of the thickness of the Ni coating on the maximum stress level and stress distribution in the BMG samples was analyzed by ANSYS finite element simulation. It was found that when the thickness of the coating was 30% of the radius of the cylindrical compressed sample, the stress distribution caused by the Ni coating was the most uniform, and the maximum stress level was relatively reduced, which is beneficial for improving the geometric confinement effect. As a result, the Mg-based BMG sample coated with a Ni coating of 150 μm thickness exhibited ~0.3% macroscopic compressive plasticity. This is of great significance for understanding the plastic deformation mechanism of brittle BMGs improved by geometric confinement.

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Section: Introductionmentioning

confidence: 99%

The Effect of Electroplating Nickel on the Mechanical Properties of Brittle Mg-Based Bulk Metallic Glasses

Zhang,

Li,

Jing

et al. 2023

Coatings

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“…Lu et al [8] observed that under the constraint of a ductile Ni substrate, homogeneous plastic flow occurred in the amorphous film simultaneously with cracking or the formation of shear bands. Ren et al [9] reported that the NiP/Ni bilayered surface coating can improve the compressive ductility of the Zr-based amorphous alloy pillars. The Ni coatings absorb the mechanical energy due to the deformation of the "soft" crack buffer zone, while the NiP coatings impede the rapid propagation of shear bands as hard regions.…”

Section: Introductionmentioning

confidence: 99%

Deformation Mechanisms of NiP/Ni Composite Coatings on Ductile Substrates

Zhang

Zhou

et al. 2021

Coatings

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NiP/Ni composite coatings with different thicknesses were prepared on coarse-grained Ni substrates by electrodeposition. The tensile tests show that compared with the substrate, the toughness and strength of the samples with multilayer composite coatings are greatly improved. The uniform elongation is increased from 24% to 43%, and the yield strength is increased from 108 to 172 MPa. In the deformation process, the geometrically necessary dislocations accumulate, resulting in long-range back stress, leading to strain hardening, showing synergistic strength and ductility. The mechanical properties of composite coatings are strongly affected by the layer thickness. Molecular dynamics studies show that there is a more uniform distribution of the shear strain in thinner coatings, and the propagation of shear transformation zones (STZs) is restrained, preventing the formation of a large shear band. With the decrease of thickness, the deformation of the NiP layer changes from shear fracture to the coexistence of uniform deformation and shear deformation. The interface resistance of the multilayer structure increases the resistance of crack propagation and alleviates the effects of NiP layer cracking on substrate cracking. Multilayer amorphous/crystalline coatings therefore may increase the toughness of the Ni substrate.

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Preparation of magnetic Ni-P amorphous alloy microspheres and their catalytic performance towards thermal decomposition of ammonium perchlorate

Deng

Yang

Ge³

et al. 2017

Applied Surface Science

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Plasticity enhancement in Ni–P amorphous alloy/Ni/Zr-based metallic glass composites with a sandwich structure

Cited by 17 publications

References 32 publications

The Effect of Electroplating Nickel on the Mechanical Properties of Brittle Mg-Based Bulk Metallic Glasses

The Effect of Electroplating Nickel on the Mechanical Properties of Brittle Mg-Based Bulk Metallic Glasses

Deformation Mechanisms of NiP/Ni Composite Coatings on Ductile Substrates

Preparation of magnetic Ni-P amorphous alloy microspheres and their catalytic performance towards thermal decomposition of ammonium perchlorate

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