Continuous fabrication of bulk amorphous alloy sheets by twin-roll strip casting

Lee, Jung G.; Lee, Hakcheol; Oh, Yoon Suk; Lee, S.; Kim, Nack J.

doi:10.1016/j.intermet.2006.01.039

Cited by 36 publications

(27 citation statements)

References 28 publications

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“…Flat rolled sheets/ plates represent more than 80% of the market for the production of general metal/ alloy products [1]. If BMG was readily available in this form its value would be greatly increased.…”

Section: Bulk Metallic Glassmentioning

confidence: 99%

“…TRC, which can achieve high cooling rates (10 2 -10 3 K/s) has been examined as a possible method to continuously produce BMG strips [1][2][3]. Various problems were encountered such as: achieving the cooling rates required, selecting an optimum casting speed taking into account the low conductivity of metallic glass and determining the HTC between rolls and the strip.…”

Section: Trc Of Bmgmentioning

confidence: 99%

“…Three assumed values, increasing for three distinct stages of the process, where chosen based on the range of HTC specified by literature [1,3] 0.15 (Wcm -2 K) 0.25 (Wcm -2 K) 0.40 (Wcm -2 K) The diameter of the rolls chosen for the model was 20 cm and the strip thickness was initially chosen as 2mm.…”

Section: Description Of Modelmentioning

confidence: 99%

“…The material properties and process parameter for Vit 1 which were required to run the model were obtained from the literature [1,3] Over the same range of casting speeds as used in the binary alloy model (1-5cm/s), it was found that the Vit 1 strip exits at sufficient low temperatures to remain strong enough to ensure continuous casting. The matter of interest is then whether the strip is fully amorphous throughout or if it contains some crystalline particles.…”

Section: Bmg -Vitmentioning

confidence: 99%

“…The matter of interest is then whether the strip is fully amorphous throughout or if it contains some crystalline particles. The research carried out by Lee et al [1,3] set two criteria for the successful casting of a fully amorphous strip.…”

Section: Bmg -Vitmentioning

confidence: 99%

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Modelling and simulation of twin-roll casting of bulk metallic glasses

Duggan

Browne

2009

Trans Indian Inst Met

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Section: Bulk Metallic Glassmentioning

confidence: 99%

Section: Trc Of Bmgmentioning

confidence: 99%

Section: Description Of Modelmentioning

confidence: 99%

Section: Bmg -Vitmentioning

confidence: 99%

Section: Bmg -Vitmentioning

confidence: 99%

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Modelling and simulation of twin-roll casting of bulk metallic glasses

Duggan

Browne

2009

Trans Indian Inst Met

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Processing of Bulk Metallic Glass

2010

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Bulk metallic glass (BMG) formers are multicomponent alloys that vitrify with remarkable ease during solidification. Technological interest in these materials has been generated by their unique properties, which often surpass those of conventional structural materials. The metastable nature of BMGs, however, has imposed a barrier to broad commercial adoption, particularly where the processing requirements of these alloys conflict with conventional metal processing methods. Research on the crystallization of BMG formers has uncovered novel thermoplastic forming (TPF)-based processing opportunities. Unique among metal processing methods, TPF utilizes the dramatic softening exhibited by a BMG as it approaches its glass-transition temperature and decouples the rapid cooling required to form a glass from the forming step. This article reviews crystallization processes in BMG former and summarizes and compares TPF-based processing methods. Finally, an assessment of scientific and technological advancements required for broader commercial utilization of BMGs will be made.

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The Effects of Microstructure Refinement and Coincidence Site Lattice Boundaries on the Plasticity of FeCrAlY Alloys

Cao

Jiang

et al. 2022

steel research int.

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FeCrAlY alloys are widely used as thin‐gauge catalyst carriers for automotive exhaust gas purification. However, they exhibit low ductility due to coarse Fe–Y phases in the alloys, which decreases the carrier yield. To improve the plasticity of the alloys, a novel method for fabricating FeCrAlY alloys using twin‐roll strip casting (TRSC) is proposed. It is found that the plasticity of the FeCrAlY alloy is significantly improved by TRSC compared to conventional ingot casting. Then, to understand the mechanism of plasticity improvement, the microstructures of the alloys are investigated. The Fe–Y phases and grains are significantly refined by TRSC due to its characteristics of subrapid solidification. In addition, the TRSC samples produce several low‐Σ coincidence site lattice (CSL) boundaries, and some of these CSL grain boundaries are inherited by the cold‐rolled sheets. The impact characteristic of steel liquid in the TRSC is the major reason for the formation of CSL grain boundaries. The finer microstructure and greater number of low‐Σ CSL boundaries in the TRSC samples result in strong resistance to fracture, which improves the plasticity of the FeCrAl alloys.

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Continuous fabrication of bulk amorphous alloy sheets by twin-roll strip casting

Cited by 36 publications

References 28 publications

Modelling and simulation of twin-roll casting of bulk metallic glasses

Modelling and simulation of twin-roll casting of bulk metallic glasses

Processing of Bulk Metallic Glass

The Effects of Microstructure Refinement and Coincidence Site Lattice Boundaries on the Plasticity of FeCrAlY Alloys

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