Deformation behavior of designed dual-phase CuZr metallic glasses

Peng, Chuanxiao; Şopu, Daniel; Cheng, Yun; Song, Kaikai; Wang, S.H.; Eckert, J.; Wang, L.

doi:10.1016/j.matdes.2019.107662

Cited by 27 publications

(6 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The solid-like region forms elastic networks, while the liquid-like region enveloped by the network acts as a viscous flow unit that dissipates energy. In BMGs, local shear events induced by external forces have been shown to cause expansion of the liquid-like region after absorbing energy, which promotes the growth and formation of the liquid-like region 47 , 48 . Now the question is: what will happen when under cyclic loading?…”

Section: Resultsmentioning

confidence: 99%

Joining of metallic glasses in liquid via ultrasonic vibrations

Li,

Huang

et al. 2023

Nat Commun

View full text Add to dashboard Cite

Joining processes especially for metallic materials play critical roles in manufacturing industries and structural applications, therefore they are essential to human life. As a more complex technique, under-liquid joining has far-reaching implications for national defense, offshore mining. Furthermore, up-to-now, the effective joining of metals in extreme environments, such as the flammable organo-solvent or the arctic liquid nitrogen, is still uninvestigated. Therefore, an efficient under-liquid joining approach is urgently called for. Here we report a method to join different types of metallic glasses under water, seawater, alcohol and liquid-nitrogen. The dynamic heterogeneity and liquid-like region expansion induces fluid-like behavior under ultrasonic vibration to promote oxide layer dispersion and metal bonding, allowing metallic glasses to be successfully joined in heat-free conditions, while still exhibiting excellent tensile strength (1522 MPa), bending strength (2930 MPa) and improved corrosion properties. Our results provide a promising strategy for manufacturing under offshore, polar, oil-gas and space environments.

show abstract

Section: Resultsmentioning

confidence: 99%

Joining of metallic glasses in liquid via ultrasonic vibrations

Li,

Huang

et al. 2023

Nat Commun

View full text Add to dashboard Cite

show abstract

“…A former study reports that the ductility of BMGs intrinsically correlates with their STZs volumes 18 . This explains why an improved deformability/ductility of MGs was observed after imprinting, minor alloying, flash annealing, integrating crystalline phases to form composites or deformationcycling in the so-called elastic regime [3][4][5][6][7][8][9][10][37][38][39] since all these procedures stimulate topological changes by shuffling atoms/clusters and thus increase the STZ volume. The results obtained from Fig.…”

Section: Modelsmentioning

confidence: 99%

“…The key parameter for ductility seems to be the structural heterogeneity of the amorphous material, which can be selectively manipulated by imprinting, minor alloying, flash annealing, integrating crystalline phases to form composites or deformation-cycling in the so-called elastic regime [2][3][4][5][6][7][8][9][10] . In the absence of crystallinity, such structural heterogeneity may be comprehended as polyamorphism, i.e.…”

Section: Introductionmentioning

confidence: 99%

What renders bulk metallic glass ductile/brittle? -- new insight from the medium-range order

Davani,

Hilke,

Rösner

et al. 2020

Preprint

View full text Add to dashboard Cite

Understanding ductility or brittleness of monolithic bulk metallic glasses (BMGs) requires detailed knowledge of the amorphous structure. The medium range order (MRO) of ductile Pd 40 Ni 40 P 20 and brittle Zr 52.5 Cu 17.9 Ni 14.6 Al 10 Ti 5 (Vit105) was characterized prior to and after notched 3-point bending tests using variable-resolution fluctuation electron microscopy. Here we show the presence of a second larger MRO correlation length in the ductile material which is not present in the brittle material. A comparison with literature suggests that the larger correlation length accounts for larger shear transformation zones (STZs) which increase the heterogeneity. This enables an easier shear band formation and thus explains the difference in deformability.

show abstract

“…The larger value of ρ indicates that the sample has better plasticity. [41,42] For the Mg 20 Al 80 DPMA model, the values of ρ with AB spacing of 1.0, 3.0, 5.0, 7.0, 8.0, and 9.0 nm are 2.33, 4.54, 6.67, 8.33, 9.09, and 11.11, respectively. According to the values of τ y and ρ of the samples, the mechanical properties of the DPMA are representatively characterized in Fig.…”

Section: Effect Of Amorphous Phasementioning

confidence: 99%

Balancing strength and plasticity of dual-phase amorphous/crystalline nanostructured Mg alloys*

Wang¹,

Song²,

An³

et al. 2020

Chinese Phys. B

View full text Add to dashboard Cite

The dual-phase amorphous/crystalline nanostructured model proves to be an effective method to improve the plasticity of Mg alloys. The purpose of this paper is to explore an approach to improving the ductility and strength of Mg alloys at the same time. Here, the effect of amorphous phase strength, crystalline phase strength, and amorphous boundary (AB) spacing on the mechanical properties of dual-phase Mg alloys (DPMAs) under tensile loading are investigated by the molecular dynamics simulation method. The results confirm that the strength of DPMA can be significantly improved while its excellent plasticity is maintained by adjusting the strength of the amorphous phase or crystalline phase and optimizing the AB spacing. For the DPMA, when the amorphous phase (or crystalline phase) is strengthened to enhance its strength, the AB spacing should be increased (or reduced) to obtain superior plasticity at the same time. The results also indicate that the DPMA containing high strength amorphous phase exhibits three different deformation modes during plastic deformation with the increase of AB spacing. The research results will present a theoretical basis and early guidance for designing and developing the high-performance dual-phase hexagonal close-packed nanostructured metals.

show abstract

Deformation behavior of designed dual-phase CuZr metallic glasses

Cited by 27 publications

References 74 publications

Joining of metallic glasses in liquid via ultrasonic vibrations

Joining of metallic glasses in liquid via ultrasonic vibrations

What renders bulk metallic glass ductile/brittle? -- new insight from the medium-range order

Balancing strength and plasticity of dual-phase amorphous/crystalline nanostructured Mg alloys*

Contact Info

Product

Resources

About