Phase redistribution in an in situ Mg-based bulk metallic glass composite during deformation in the supercooled liquid region

Xu, Weixing; Robin, Lalu; Zheng, Rongkun; Laws, Kevin J.; Ferry, Michael

doi:10.1016/j.scriptamat.2010.05.029

Cited by 10 publications

(9 citation statements)

References 23 publications

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“…Subsequently, work done by in situ precipitating out ductile dendritic crystalline phases during solidification from the melt also produced BMGCs exhibiting significant ductility. [20] Similarly, Lee et al [11] reported a 6% tensile ductility in a La-base BMGC where they identified two common features for increasing ductility [55] : (i) a high volume fraction of the second phase above a certain value needs to be present in the amorphous matrix, and (ii) the second phases must be inherently ductile crystalline phases such as [52] Prospective Articles pure La in their La-base BMGCs. Hui and co-workers [47,56] recently developed a light-weight Mg-based in situ BMGC similar to that shown in Fig.…”

Section: Selected Mechanical Properties Of In Situ Bmgcsmentioning

confidence: 96%

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Recent developments in ductile bulk metallic glass composites

et al. 2013

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Offering a unique suite of mechanical, physical, and chemical properties, bulk metallic glasses (BMGs) show significant promise as engineering materials. Unfortunately, most BMGs exhibit low tensile ductility at ambient temperature that limits their use as structural (load-bearing) materials. To overcome this problem, BMG composites (BMGCs) containing a second phase are being developed for improving ductility by controlling the mechanics of shear band nucleation and growth in the glassy matrix, which is the primary mode of failure in these materials. This review describes some recent developments in BMGCs and discusses the influence of the type of second phase on mechanical behavior.

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Section: Selected Mechanical Properties Of In Situ Bmgcsmentioning

confidence: 96%

“…By deforming the BMGC shown in Fig. 9 in the SCLR, the crystalline flakes both rotate and deform plastically to realign normal to the direction of principal strain [52] (Fig. 10).…”

Section: Prospective Articlesmentioning

confidence: 99%

Recent developments in ductile bulk metallic glass composites

et al. 2013

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“…The reconstructed image in Fig. 9e shows the substantial bending of the Mg flakes with concurrent TEM indicating that they deform by dislocation slip [49].…”

Section: Phase Redistribution During Superplastic Deformation Of a Bu...mentioning

confidence: 99%

“…It is well-known that certain BMGs, when deformed in the SCL region, are superplastic [45][46][47][48]. 3D-FIB was used to investigate the redistribution of Mg flakes in the BMG composite during deformation in the SCL region in an attempt to understand its influence on mechanical properties [49]. Fig.…”

Section: Phase Redistribution During Superplastic Deformation Of a Bu...mentioning

confidence: 99%

3D-EBSD Studies of Deformation, Recrystallization and Phase Transformations

Ferry

Quadir

et al. 2012

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A focused ion beam (FIB) coupled with high resolution electron backscatter diffraction (EBSD) has emerged as a useful tool for generating crystallographic information in reasonably large volumes of microstructure. In principle, data generation is reasonably straightforward whereby the FIB is used as a high precision serial sectioning device for generating consecutive milled surfaces suitable for mapping by EBSD. The successive EBSD maps generated by serial sectioning are combined using various post-processing methods to generate crystallographic volumes of the microstructure. This paper provides an overview of the use of 3D-EBSD in the study of various phenomena associated with thermomechanical processing of both crystalline and semi-crystalline alloys and includes investigations on the crystallographic nature of microbands, void formation at particles, phase redistribution during plastic forming, and nucleation of recrystallization within various regions of the deformation microstructure.

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“…A major shortcoming of Mg-based bulk metallic glasses is their lack of ductility [24]. Many efforts have been devoted to improving their plastic deformation ability [20,[25][26][27]. Bulk metallic glasses reinforced with crystalline phases exhibit improved ductility; however, materials with an inverse microstructure (i.e., amorphous/nanocrystalline particles embedded in a crystalline matrix) have hardly been studied.…”

Section: Twin-roll Casting Of Mg-rare Earth Alloymentioning

confidence: 99%

Mg-Based Materials with Quasiamorphous Phase Produced by Vertical Twin-Roll Casting Process

Liu

Pei³

et al. 2020

Metals

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Metallic materials with micron grains, submicron grains, or amorphous structures have attracted great interest in recent decades owing to their excellent mechanical properties and corrosion resistance. Compared with traditional forming processes, rapid solidification technology has shown great superiority and potential in the preparation of materials in such structures. In this study, fine-grained quasiamorphous Mg-based alloy strips fabricated by a twin-roll strip casting process were explored using simulation and experimental methods. The concept of critical casting speed was proposed to reflect the optimum casting conditions. The product of critical casting speed and strip thickness was used to evaluate the cooling capacity of the casting system. Based on simulation results, a twin-roll strip-casting experiment was performed on a Mg-rare earth alloy. A novel puddle-like microstructure of the as-cast alloy strip was obtained. Tensile testing results showed that the novel strip exhibited improved ductility.

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Phase redistribution in an in situ Mg-based bulk metallic glass composite during deformation in the supercooled liquid region

Cited by 10 publications

References 23 publications

Recent developments in ductile bulk metallic glass composites

Recent developments in ductile bulk metallic glass composites

3D-EBSD Studies of Deformation, Recrystallization and Phase Transformations

Mg-Based Materials with Quasiamorphous Phase Produced by Vertical Twin-Roll Casting Process

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