Microstructural tailoring and improvement of mechanical properties in CuZr-based bulk metallic glass composites

Liu, Zengqian; Li, Ran; Liu, Gang; Su, Wen-huang; Wang, Hui; Li, Yan; Shi, Minjie; Luo, Xiangang; Wu, Guo Qing; Zhang, Tao

doi:10.1016/j.actamat.2012.02.017

Cited by 155 publications

(89 citation statements)

References 63 publications

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“…The ternary Cu-Zr-Ag [6][7][8][9][10][11] and Cu-Zr-Al [12][13][14][15][16] and quaternary Cu-Zr-Ag-Al [17][18][19][20][21] systems have been recently studied regarding the bulk glass forming ability (BGFA); however, only a few studies have been focused on crystallization products that may occur during solidification in the Cu-Zr-Ag alloy system. There has been no standard definition of glass forming ability (GFA) up to date; generally, this parameter is derived from the properties of atomic components or those of the produced amorphous sample.…”

Section: Introductionmentioning

confidence: 99%

Solidification processes in Cu–Zr–Ag amorphisable alloy system

Janovszky

Sycheva

Tomolya

et al. 2014

Journal of Alloys and Compounds

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Abstract:The Cu-Zr-Ag system is one of Cu-Zr based bulk metallic glasses (BMG) that has been in the center of great interest for a long time. This work summarizes results on solidification in the Cu-Zr-Ag ternary alloys and relationship between the cooling rate and their microstructure. The alloys in a wide range of compositions were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and differential scanning calorimetry (DSC) techniques. The surface of stable liquidus miscibility gap has been presented by isothermal sections in this system. The central part of liquidus projection of the ternary Cu-Zr-Ag system is determined based on the harmonization of experimental results and the calculated phase diagrams. Due to the liquid separation, amorphous/crystalline composites could be obtained with a silver content up to 50 at%. The primary solidified phases were identified in different samples cooled with a controlled cooling rate (5 K/min), in the arc melting furnace (master alloys) and in a wedge shape mould. It has been shown that the m-phase (or AgCu 4 Zr) has the lowest and the (CuAg) 10 Zr 7 the highest driving force for nucleation in this system. It has been shown that the glass forming ability depends not only on the properties of atomic constituent but on the phases formed during the solidification of undercooled liquid.

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Section: Introductionmentioning

confidence: 99%

Solidification processes in Cu–Zr–Ag amorphisable alloy system

Janovszky

Sycheva

Tomolya

et al. 2014

Journal of Alloys and Compounds

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“…Recently, it has been found that, by introducing a shape memory ductile phase into the glassy matrix, the fabricated BMG composites show not only a pronounced tensile ductility but also a macroscopic work-hardening capability during deformation at room temperature [19][20][21][22][23][24][25][26][27]. Upon loading, besides the formation of multiple shear bands in the glassy matrix, ductile shape memory crystals experience the martensitic transformation (MT) from a cubic phase to monoclinic phases [19][20][21][22][23][24][25][26][27], which can provide the pronounced work hardening.…”

Section: Introductionmentioning

confidence: 99%

Deformation-Induced Martensitic Transformation in Cu-Zr-Zn Bulk Metallic Glass Composites

Song

Cao

et al. 2015

Metals

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Abstract:The microstructures and mechanical properties of (Cu0.5Zr0.5)100−xZnx (x = 0, 1.5, 2.5, 4.5, 7, 10, and 14 at. %) bulk metallic glass (BMG) composites were studied. CuZr martensitic crystals together with minor B2 CuZr and amorphous phases dominate the OPEN ACCESSMetals 2015, 5 2135 microstructures of the as-quenched samples with low Zn additions (x = 0, 1.5, and 2.5 at. %), while B2 CuZr and amorphous phases being accompanied with minor martensitic crystals form at a higher Zn content (x = 4.5, 7, 10, and 14 at. %). The fabricated Cu-Zr-Zn BMG composites exhibit macroscopically appreciable compressive plastic strain and obvious work-hardening due to the formation of multiple shear bands and the deformation-induced martensitic transformation (MT) within B2 crystals. The present BMG composites could be a good candidate as high-performance structural materials.

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“…(2) . Noting that reinforcement particles act both as nucleation sites as well as obstacles to shear band propagation, the spatial configuration of the crystalline phases at the percolation threshold will be dependent on details of the glass composition and structure, as well as, e.g., the shape and average length scale of the reinforcement phases [13,27,32].…”

Section: Discussionmentioning

confidence: 99%

“…Among these, the volume fraction is a structural parameter to effectively tune the composite's properties. It was found that, the plastic deformation exhibits a nonlinear enhancement as the volume fraction of crystalline phases increases above a critical value [13,27,32]. Lee et al [13] and Liu et al [32] have ascribed this phenomenon to percolation of shear banding, corresponding to a specific configuration of crystalline phases' distribution.…”

Section: Introductionmentioning

confidence: 99%

“…However, the presence of crystalline phases tends to decrease the global strength of composites as compared to pure matrix glasses. Therefore, sustained efforts have been made to optimize the strength and plasticity of composites by modifying the sizes, spacing, shape, distribution and volume fraction of crystalline phases [13,[24][25][26][27][28][29][30][31]. Among these, the volume fraction is a structural parameter to effectively tune the composite's properties.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tuning plasticity of in-situ dendrite metallic glass composites via the dendrite-volume-fraction-dependent shear banding

Liu

Chen

Jiang

et al. 2017

Materials Science and Engineering: A

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A B S T R A C TThis work performs a systematic investigation of identifying how the volume fraction of the in-situ dendrites affects the plasticity of metallic glass composites. The quasi-static uniaxial compressions show that the global plastic strain does not follows a linear rule-of-mixture with the dendrite volume faction, instead, a slow-fastslow enhancement behaviour is observed with increasing dendrite volume fraction. It is demonstrated that the nucleation and propagation of shear bands in these composites are dependent on the dendrite volume fraction. When the dendrite volume fraction exceeds a critical value, multiple shear bands emerge in a spherical plastic zone around a dendrite. It is further proposed that the percolation of these spherical plastic zones contributes to the fast increase in the plastic strain of the glass composites. Our findings offer important implications for the microstructural optimization of the metallic glass composites with desirable mechanical properties.

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Microstructural tailoring and improvement of mechanical properties in CuZr-based bulk metallic glass composites

Cited by 155 publications

References 63 publications

Solidification processes in Cu–Zr–Ag amorphisable alloy system

Solidification processes in Cu–Zr–Ag amorphisable alloy system

Deformation-Induced Martensitic Transformation in Cu-Zr-Zn Bulk Metallic Glass Composites

Tuning plasticity of in-situ dendrite metallic glass composites via the dendrite-volume-fraction-dependent shear banding

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