Fe-based bulk metallic glass matrix composite with large plasticity

Guo, Shuyu; Liu, L.; Li, N.; Li, Y.

doi:10.1016/j.scriptamat.2009.10.024

Cited by 167 publications

(65 citation statements)

References 32 publications

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“…Among which, formation of BMG composite structures has been proved to be an effective way in enhancing the roomtemperature plasticity, and large tensile ductility has been achieved by proper introduction of the dendritic reinforcing phases into Zr-or Ti-based BMGs [4][5][6][7][8][9][10]. However, these types of BMG composites still show the strain-softening behavior [9,10].…”

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confidence: 99%

Relationship between composite structures and compressive properties in CuZr-based bulk metallic glass system

Song

Zhang

et al. 2011

Chin. Sci. Bull.

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Bulk metallic glass (BMG) composites with the austenite B2 phase as reinforcement macroscopically showed strain hardening behavior due to the plasticity induced by martensitic transformation during deformation. Relationship between characteristics of the B2-CuZr reinforcing phase and uniaxial compressive properties of CuZr-based BMG composites was studied. Mechanical properties of these BMG composites were found to depend on not only the reinforced phases but also the amorphous matrix, and the yield and fracture strength can be roughly estimated by the rule of mixture principle. Distribution of the reinforced B2-CuZr phase has an important impact on the compressive plasticity even for the composites with a similar volume fraction of the crystalline phase.

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confidence: 99%

Relationship between composite structures and compressive properties in CuZr-based bulk metallic glass system

Song

Zhang

et al. 2011

Chin. Sci. Bull.

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“…Some characteristics of metallic glasses can be superior to their crystalline counterparts [7,15,16], and adverse properties can be mitigated by developing composites with ductile or hard crystals in a bulk amorphous matrix [17][18][19] or a twophase nanocomposite microstructure [20][21][22][23][24]. Hence, the knowledge of the crystallization kinetics and the phase sequence is essential to either determine the thermal stability of the alloy under specific conditions or to optimize the generation route of new microstructures.…”

Section: Introductionmentioning

confidence: 99%

Kinetics and crystallization path of a Fe-based metallic glass alloy

et al. 2017

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The thermal stability and the quantification of the different transformation processes involved in the overall crystallization of the Fe50Cr15Mo14C15B6 amorphous alloy were investigated by several characterization techniques. Formation of various metastable and stable phases during the devitrification process in the sequence α-Fe, χ-Cr6Fe18Mo5, M23(C,B)6, M7C3, η-Fe3Mo3C and FeMo2B2 (with M=Fe, Cr, Mo), was observed by in-situ synchrotron high energy X-ray diffraction and in-situ transmission electron microscopy. By combining these techniques with differential scanning calorimetry data, the crystallization states and their temperature range of stability under continuous heating were related with the evolution of the crystallized fraction and the phase sequence as a function of temperature, revealing structural and chemical details of the different transformation mechanisms.

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“…In the past decades, a new class of composites, called bulk metallic glass (BMG) composites, have been explored by introducing ductile crystalline phases ex situ or in situ in a glassy matrix in order to enhance the ductility or/and toughness at the cost of the high strength of intrinsically brittle BMGs [4][5][6][7][8][9][10][11][12][13][14][15]. During deformation, ductile crystals in BMG composites may serve as heterogeneous nucleation sites for the initiation of shear bands and act as attraction or pinning centers during shear band propagation.…”

Section: Introductionmentioning

confidence: 99%

“…However, the strain softening induced by the formation of shear bands in the glassy matrix cannot be compensated by the strain hardening provided by these ductile phases during deformation. Overall, the microscopic strain-softening of BMG composites dominates their plastic deformation [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. In this regard, shape memory B2 CuZr crystals were introduced into a glassy matrix as an alternative reinforcing phase because the B2 CuZr crystals usually show a pronounced work hardening during deformation due atmosphere, which were remelted at least for three times to achieve chemical homogeneity.…”

Section: Introductionmentioning

confidence: 99%

Glass-Forming Ability and Early Crystallization Kinetics of Novel Cu-Zr-Al-Co Bulk Metallic Glasses

Han

Qin

et al. 2016

Metals

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Abstract:In recent years, CuZr-based bulk metallic glass (BMG) composites ductilized by a shape memory B2 CuZr phase have attracted great attention owing to their outstanding mechanical properties. However, the B2 CuZr phase for most CuZr-based glass-forming compositions is only stable at very high temperatures, leading to the uncontrollable formation of B2 crystals during quenching. In this work, by introducing Co (i.e., 4, 5, and 6 at. %) and 10 at. % Al into CuZr-based alloys, the relatively good glass-forming ability (GFA) of CuZr-based alloys still can be achieved. Meanwhile, the B2 phase can be successfully stabilized to lower temperatures than the final temperatures of crystallization upon heating CuZr-based BMGs. Unlike previous reported CuZr-based BMGs, the primary crystallization products upon heating are mainly B2 CuZr crystals but not CuZr 2 and Cu 10 Zr 7 crystals. Furthermore, the primary precipitates during solidification are still dominated by B2 crystals, whose percolation threshold is detected to lie between 10 ± 2 vol. % and 31 ± 2 vol. %. The crystallization kinetics underlying the precipitation of B2 crystals was also investigated. Our results show that the present glass-forming composites are promising candidates for the fabrication of ductile CuZr-based BMG composites.

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Fe-based bulk metallic glass matrix composite with large plasticity

Cited by 167 publications

References 32 publications

Relationship between composite structures and compressive properties in CuZr-based bulk metallic glass system

Relationship between composite structures and compressive properties in CuZr-based bulk metallic glass system

Kinetics and crystallization path of a Fe-based metallic glass alloy

Glass-Forming Ability and Early Crystallization Kinetics of Novel Cu-Zr-Al-Co Bulk Metallic Glasses

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