Universally scaling Hall-Petch-like relationship in metallic glass matrix composites

Liu, Y.Y.; Liu, P.Z.; Li, J.J.; Liaw, Peter K.; Spieckermann, Florian; Kiener, Daniel; Qiao, J.W.; Eckert, J.

doi:10.1016/j.ijplas.2018.02.015

Cited by 47 publications

(6 citation statements)

References 66 publications

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“…Increased number of shear bands along the two sides of the crack are displayed, suggesting the advantages of the tubular structure in resisting fracture, compared to Figure 5 As indicated by the arrows in the inset C4, the shear bands intersect with each other and tend to branch and deviate during their propagation, indicating more conspicuous plastic deformation around the crack tip during fracture. More importantly, as shown in C5, dimples and slip bands are observed on the Ti6Al4V frame, suggesting that the Ti6Al4V frame also affords considerable plastic deformation during the crack propagation process and enhances the fracture toughness [10]. The deflection of cracks and the deformation of the frame explain the significantly increased fracture toughness of the BMG composite reinforced with 2-layers frame #2.…”

Section: Resultsmentioning

confidence: 87%

“…Utilizing the transformation of metastable B2-CuZr phase to martensite B19 phase during the loading process, Wu et al [8] fabricated a B2-CuZr phase reinforced CuZr-based BMG composites, which even exhibits workhardening under tensile loading. Qiao et al established a quantitative tensile model [9] to elucidate the respective contribution of dendrites and BMG matrix in the ductility of in-situ dendrites reinforced BMG composites, and derived an universal Hall-Petch-like relationship [10] which reveals the strengthening effect of dendrites on the composites. Although a series of in-situ BMG composites with high-performance have been developed, the spatial distribution of crystalline phases remains tough to control [11,12], which limits the reliability and stability of BMG composites.…”

Section: Introductionmentioning

confidence: 99%

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Metal frame reinforced bulk metallic glass composites

Meng

et al. 2019

Materials Research Letters

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Inspired by the aseismic structure of skyscrapers, Ti6Al4V frames with tubular structure were designed, 3D printed and thermoplastic formed with Zr 35 Ti 30 Be 26.75 Cu 8.25 bulk metallic glass matrix under ultrasonic vibration, forming sandwich-structured bulk metallic glass composites. The interface characterization between matrix and frame reveals a typical metallurgical bonding. By tuning the geometry of Ti6Al4V frame, the composites manifest an enhanced fracture toughness of 213 MPa m 1/2 , 2.3 times higher than that of the monolithic bulk metallic glass. Our findings provide a promising route for the development of metallic composites. Highlights • Our findings providing a promising route for the fabrication of strong-and-tough BMG composites. • Metallurgical bonding was achieved at the interface between BMG matrix and the Ti6Al4V frame. • By tuning the geometry of Ti6Al4V frame, the BMG composites exhibited high fracture toughness of about 213 MPa m 1/2 and a bending strength of about 1 GPa. IMPACT STATEMENT A promising route for the design and fabrication of bulk metallic glass composites with tailored mechanical properties was developed by combing ultrasonic vibration-assisted thermoplastic forming and 3D printing.

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Section: Resultsmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Metal frame reinforced bulk metallic glass composites

Meng

et al. 2019

Materials Research Letters

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“…Refining the grain size can improve the ductility and the strength of the alloy at the same time [ 58 , 63 ]. According to the Hall–Petch relation [ 59 , 64 , 65 ], which can be written as follows (4): σ y = σ 0 + kd −1/2 where k is a material constant, as well as normal stress σ 0 , and d represents the grain size. Obviously, alloys with smaller grain sizes should possess higher yield strength according to this Hall–Petch relation.…”

Section: Discussionmentioning

confidence: 99%

“…Refining the grain size can improve the ductility and the strength of the alloy at the same time [58,63]. According to the Hall-Petch relation [59,64,65], which can be written as follows ( 4):…”

Section: Possible Strengthening Mechanismmentioning

confidence: 99%

Effect of Thermo-Mechanical Treatment on the Microstructure and Tensile Properties of the Fe-22Cr-5Al-0.1Y Alloy

et al. 2021

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Oxide dispersion strengthened ferritic steel is considered an important structural material in fusion reactors due to its excellent resistance to radiation and oxidation. Fine and dispersed oxides can be introduced into the matrix via the powder metallurgy process. In the present study, large grain sizes and prior particle boundaries (PPBs) formed in the FeCrAlY alloy prepared via powder metallurgy. Thermo-mechanical treatment was conducted on the FeCrAlY alloy. Results showed that microstructure was optimized: the average grain diameter decreased, the PPBs disappeared, and the distribution of oxides dispersed. Both ultimate tensile strength and elongation improved, especially the average elongation increased from 0.5% to 23%.

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“…As a new type of amorphous materials, metallic glasses (MGs) have many unique performance such as superb strength and hardness, excellent corrosion resistance and high wear resistance, thus has wide potential applications in engineering field (Schuh et al 2007, Yavari et al 2007. However, compared to conventional crystalline alloys, MGs display completely different deformation and fracture mechanisms which are still poorly understood (Qiao et al 2016, Liu et al 2018. Generally, when a MG was deformed at room temperature, almost all plastic strain is concentrated within the nanoscale shear band regions with a thickness of only about 10-20 nm.…”

Section: Introductionmentioning

confidence: 99%

Normal stress effect on plastic yielding of notched metallic glass: a finite element simulation study

Zhong

Ren

et al. 2020

Mater. Res. Express

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The pressure or normal stress effect on the plastic yielding of metallic glasses (MGs) is still poorly understood due to their complex nature of deformation process. A knowledge on the internal stress distribution and evolution around the plastic shearing plane holds the key for understanding the above issue. In this study, we studied the plastic deformation process of a notched bulk metallic glass by finite element simulation using the von-Mises yielding criterion and Mohr-Coulomb yield criterion, respectively. The internal shear stress distribution and evolution on the notched shear plane was analyzed, and the yielding strength is extracted by averaging the shear stress on the shear plane. It was found that the plastic flow of MGs is greatly influenced by the pressure/normal stress effect as captured by Mohr-Coulomb yielding criterion, and the strength extracted with the criterion agrees well with that obtained from experiments. The effect of pressure/normal stress on the plastic flow of MGs are also discussed from the mechanistic viewpoint. Our results may help for understanding the underlying origin for the pressure/normal stress effect on the plastic flow of MGs.

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Universally scaling Hall-Petch-like relationship in metallic glass matrix composites

Cited by 47 publications

References 66 publications

Metal frame reinforced bulk metallic glass composites

Metal frame reinforced bulk metallic glass composites

Effect of Thermo-Mechanical Treatment on the Microstructure and Tensile Properties of the Fe-22Cr-5Al-0.1Y Alloy

Normal stress effect on plastic yielding of notched metallic glass: a finite element simulation study

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