High pressure die casting of Fe-based metallic glass

Ramasamy, Parthiban; Szabó, Attila; Borzel, Stefan; Eckert, J.; Stoica, M.; Bàrdos, Andràs

doi:10.1038/srep35258

Cited by 24 publications

(6 citation statements)

References 64 publications

(71 reference statements)

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“…As a vacuum forming method, EPV-HPDC offers a novel pathway for manufacturing other advanced materials, such as metallic glass matrix composites, high-entropy alloys, and nanostructured materials, in complex shapes. Furthermore, the flowing speed of the supercooled liquid and solidification pressure in the EPV-HPDC process can reach tens of meters per second and hundreds of megapascal [16], which are orders of magnitude larger than that of the common fabricating way of the BMGs, such as suction casting. Hence, the EPV-HPDC process provides access to study some of the critical scientific issues, such as the extreme fluid dynamics of glass forming liquid, shear-induced structural changes in fast-relaxing atomic liquids and melt [38,39], and relaxation kinetics of supercooled glass forming liquid under pressure [40], which are fundamental concerns for amorphous materials.…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the HPDC process is also considered as the one of the methods with the most potential to be applied to the large-scale production of BMG components with sophisticated geometries. Recently, low oxygen affinity Fe-based bulk metallic glass with a key-shape was produced successfully using a traditional HPDC method in an open atmosphere [16]. However, most glass formers are extremely oxidizable, and thus are difficult to be synthesized directly by this route.…”

Section: Introductionmentioning

confidence: 99%

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Near-Net Forming Complex Shaped Zr-Based Bulk Metallic Glasses by High Pressure Die Casting

et al. 2018

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Forming complex geometries using the casting process is a big challenge for bulk metallic glasses (BMGs), because of a lack of time of the window for shaping under the required high cooling rate. In this work, we open an approach named the “entire process vacuum high pressure die casting” (EPV-HPDC), which delivers the ability to fill die with molten metal in milliseconds, and create solidification under high pressure. Based on this process, various Zr-based BMGs were prepared by using industrial grade raw material. The results indicate that the EPV-HPDC process is feasible to produce a glassy structure for most Zr-based BMGs, with a size of 3 mm × 10 mm and with a high strength. In addition, it has been found that EPV-HPDC process allows complex industrial BMG parts, some of which are hard to be formed by any other metal processes, to be net shaped precisely. The BMG components prepared by the EVP-HPDC process possess the advantages of dimensional accuracy, efficiency, and cost compared with the ones formed by other methods. The EVP-HPDC process paves the way for the large-scale application of BMGs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Near-Net Forming Complex Shaped Zr-Based Bulk Metallic Glasses by High Pressure Die Casting

et al. 2018

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“…The binaries Ag-Pr, Be-Fe, Ag-Yb, Mg-Eu, Ag-Te and Ag-Sm are also proposed with confidence to form bulk metallic glasses. Of these, Ag-Pr has been suggested as a potential metallic glass former 15 and Fe, Ag and Te have been used as additions in multicomponent metallic glass systems in various combinations 45–47 , similar to Ag-Yb and Mg-Eu. Furthermore, nearly pure Ag-Te has been reported in some cases when investigating Te- based chalcogenide glasses 48 .…”

Section: Discussionmentioning

confidence: 99%

Probabilistic Assessment of Glass Forming Ability Rules for Metallic Glasses Aided by Automated Analysis of Phase Diagrams

Dasgupta¹,

Broderick²,

Mack³

et al. 2019

Sci Rep

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The use of machine learning techniques to expedite the discovery and development of new materials is an essential step towards the acceleration of a new generation of domain-specific highly functional material systems. In this paper, we use the test case of bulk metallic glasses to highlight the key issues in the field of high throughput predictions and propose a new probabilistic analysis of rules for glass forming ability using rough set theory. This approach has been applied to a broad range of binary alloy compositions in order to predict new metallic glass compositions. Our data driven approach takes into account not only a broad variety of thermodynamic, structural and kinetic based criteria, but also incorporates qualitative and descriptive attributes associated with eutectic points in phase diagrams. For the latter, we demonstrate the use of automated machine learning methods that go far beyond text recognition approaches by also being able to interpret phase diagrams. When combined with structural descriptors, this approach provides the foundations to develop a hierarchical probabilistic predication tool that can rank the feasibility of glass formation.

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“…Heinrich et al (2012) reported that Zr58.5Cu15.6Ni12.8Al10.3Nb2.8 BMG with size of 5mm can be prepared by a horizontal vacuum cold-chamber die casting process. Ramasamy et al 2016 found Fe-based bulk metallic glass key-shaped specimens can be fabricated by HPDC under Ar atmosphere. However, systematic study on the fabrication ability of HPDC for a certain composition is still absent.…”

Section: Introductionmentioning

confidence: 96%

Determination of forming ability of high pressure die casting for Zr-based metallic glass

Liu

et al. 2017

Journal of Materials Processing Technology

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Large-sized industrial grade Zr55Cu30Ni5Al10 bulk metallic glass (BMG) was fabricated by a two-step arc-melting process and adding a trace of rare earth yttrium elements. A model to calculate critical cooling rate for forming BMG was established by considering the effect of pressure. Based on the model, the most important indicator, namely the critical size of forming BMG, for design and fabrication of BMG components by high pressure die casting (HPDC) is determined in consideration of different processing parameters, including the pressure and casting temperature. Theoretical calculation and numerical simulation indicated that increasing applied pressure during casting suppresses the nucleation of crystal nuclei but has little effect on the growth of nuclei at a deep supercooled temperature, thereby decreasing critical cooling rate and thus increase critical size. An increasing casting temperature would reduce critical size caused by more heat to dissipate. The critical size of the optimized Zr55Cu30Ni5Al10 BMG cast by using steel mold is determined to be about 4–7 mm under different HPDC parameters. Our study reveals that the forming ability of HPDC is large enough for fabricating low cost Zr-based BMGs with suitable size for applications

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High pressure die casting of Fe-based metallic glass

Cited by 24 publications

References 64 publications

Near-Net Forming Complex Shaped Zr-Based Bulk Metallic Glasses by High Pressure Die Casting

Near-Net Forming Complex Shaped Zr-Based Bulk Metallic Glasses by High Pressure Die Casting

Probabilistic Assessment of Glass Forming Ability Rules for Metallic Glasses Aided by Automated Analysis of Phase Diagrams

Determination of forming ability of high pressure die casting for Zr-based metallic glass

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